2007-2013 Mercedes C Class 4 Door Safety User Manual
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USER MANUALS FOR EVERY MAKE & MODEL

Safety for Your Mercedes C Class 4 Door Second Generation (2007-2013)

Useful information .............................. 40
Panic alarm .......................................... 40
Occupant safety .................................. 40
Children in the vehicle ........................ 58
Driving safetysystems ....................... 64
Theft deterrent locking system ......... 71
39
Safety
Useful information
i
This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i
Read the information on qualified
specialist workshops: (Y page 25).
Panic alarm
X
To activate: press ! button : for
approximately one second.
An alarm sounds and the exterior lighting
flashes.
X
To deactivate: press ! button :
again.
or
X
Insert the SmartKey into the ignition lock.
or
X
Press the KEYLESS-GO Start/Stop button.
The KEYLESS-GO key must be in the
vehicle.
Occupant safety
Overview of occupant safety
In this section, you will learn the most
important facts about the restraint system
components of the vehicle.
The restraint system consists of:
R
seat belts
R
child restraint systems
R
LATCH-type (ISOFIX) child seat anchors
Additional protection is provided by:
R
SRS (Supplemental RestraintSystem)
R
NECK-PRO head restraints/NECK-PRO
luxury head restraints
R
air bag system components with:
-
PASSENGER AIRBAG OFF indicator lamp
-
front-passengerseat with Occupant
Classification System (OCS)
The differentair bag systems work
independently of each other. The protective
functions of the system work in conjunction
with each other. Not all air bags are always
deployed in an accident.
G
WARNING
Modifications to or work improperly
conducted on restraint system components
or their wiring, as well as tampering with
interconnected electronic systems, can lead
to the restraint systems no longer functioning
as intended.
Air bags or Emergency Tensioning Devices
(ETDs), for example, could deploy
inadvertently or fail to deploy in accidents
although the deceleration threshold for air
bag deploymentis exceeded. Therefore,
never modify the restraint systems. Do not
tamper with electronic components or their
software.
i
For information on infants and children
traveling with you in the vehicle restraint
systems for infants and children, see
"Children in the vehicle" (Y page 58).
40
Occupant safety
Safety
SRS (Supplemental Restraint System)
Introduction
SRS consists of:
R
The 6 SRS warning lamp
R
Air bags
R
Air bag control unit (with crash sensors)
R
Emergency Tensioning Devices
R
Belt force limiters
SRS reduces the risk of occupants coming
into contact with the vehicle's interior in the
event of an accident. It can also reduce the
effect of the forces to which occupants are
subjected during an accident.
SRS warning lamp
SRS functions are checked regularly when
you switch on the ignition and when the
engine is running. Therefore, malfunctions
can be detected in good time.
The 6 SRS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out no later than a few seconds
after the engine is started.
The SRS components are in operational
readiness when the 6 SRS warning lamp
goes out while the engine is running.
G
WARNING
The SRS self-checkhas detected a
malfunction if the 6 SRS indicator lamp:
R
does notlight up at all
R
does not go out after approximately four
seconds after the engine is started
R
comes on after the engine was started or
while driving.
For your safety, Mercedes-Benzstrongly
recommends thatyou have the system
checked as soon as possible at an authorized
Mercedes-Benz Center. SRS may otherwise
fail to activate when it is needed in the event
of an accident, which could lead to serious or
fatal injuries. SRS might also be activated
unexpectedly and unnecessarily, which could
also result in injury.
In addition, work carried out improperly on
SRS may render SRS inoperative or cause
unintended air bag deployment. Work on the
SRS system should only be carried out by
qualified specialist personnel. Consult an
authorized Mercedes-Benz Center.
If it is necessary to modify an air bag system
to accommodate a person with disabilities,
contact an authorized Mercedes-Benz Center
for details. USA only: for further information
contact our Customer Assistance center at
1-800-FOR-MERCedes (1-800-367-6372).
Safety guidelines for seat belts,
Emergency Tensioning Devices (ETDs)
and air bags
G
WARNING
R
Damaged seat belts or seat belts that have
been subjected to stress in an accident
must be replaced. Their anchoring points
must also be checked. Only use seat belts
installed or supplied by an authorized
Mercedes-Benz Center.
R
Air bags and pyrotechnic Emergency
Tensioning Devices (ETDs) contain
perchlorate material, which may require
special handling and regard for the
environment.Check your national disposal
guidelines. California residents, see
Perchlorate/.
R
Air bags and ETDs are designed to function
on a one-time-only basis. An air bag or ETD
that has deployed must be replaced.
R
Do not pass seat belts over sharp edges.
They could tear.
R
Do not make any modification that could
change the effectiveness of the seat belts.
R
Do not bleach or dye seat belts as this may
severely weaken them. In a crash they may
not be able to provide adequate protection.
R
No modifications of any kind may be made
to any components or wiring of the SRS.
Occupant safety
41
Safety
Z
R
Do not change or remove any component
or part of the SRS.
R
Do not install additional trim material, seat
covers, badges, etc. overthe steering
wheel hub, front-passenger front air bag
cover, outer sides of the seat backrests,
door trim panels, or door frame trims.
R
Do not install additional electrical/
electronic equipment on or near SRS
components and wiring.
R
Keep area between air bags and occupants
free of objects (e.g. packages, purses,
umbrellas, etc.).
R
Do not hang items such as coat hangers
from the coat hooks or handles over the
door. These items may be thrown around in
the vehicle and cause head and other
injuries when the window curtain air bag is
deployed.
R
Air bag system components will be hot after
an air bag has inflated. Do not touch them.
R
Never place your feet on the instrument
panel, dashboard, or on the seat. Always
keep both feet on the floor in front of the
seat.
R
Improper repair work on the SRS creates a
risk of rendering the SRS inoperative or
causing unintended air bag deployment.
Work on the SRS must therefore only be
performed by qualified technicians.
Contact an authorized Mercedes-Benz
Center.
R
For your protection and the protection of
others, when scrapping the air bag unit or
ETD, our safety instructions must be
followed. These instructions are available
from any authorized Mercedes-Benz
Center.
R
Given the considerable deployment speed,
required inflation volume, and the material
of the air bags, there is the possibility of
abrasions or other, potentially more serious
injuries resulting from air bag deployment.
If you sell your vehicle, Mercedes-Benz
strongly recommends that you inform the
subsequent owner that the vehicle is
equipped with SRS. Also, refer them to the
applicable section in the Operator's Manual.
Air bags
Important safety notes
G
WARNING
Air bags are designed to reduce the incidence
of injuries and fatalities in certain situations:
R
frontal impacts (driver's and front-
passenger front air bags and driver's knee
bag)
R
side impacts (side impact air bags, window
curtain air bags and pelvis air bags)
However, no system available today can
completely eliminate injuries and fatalities.
When the air bags are deployed, a small
amount of powder is released. The powder
generally does not constitute a health hazard
and does not indicate that there is a fire in the
vehicle. In order to prevent potential
breathing difficulties, you should leave the
vehicle as soon as it is safe to do so. If you
have any breathing difficulty but cannot get
out of the vehicle after the air bag inflates,
then get fresh air by opening a window or
door.
G
WARNING
In order to reduce the potential danger of
injuries caused during the deployment of the
front air bags, the driver and front passenger
must always be correctly seated and wear
their seat belts.
For maximum protection in the event of a
collision, you must always be in the normal
seat position with your back against the
backrest. Fasten your seat belt and make sure
that it is correctly positioned on your body.
42
Occupant safety
Safety
As the airbag inflates with considerable
speed and force, a proper seating position
and correct positioning of the hands on the
steering wheel will help to keep you at a safe
distance from the air bag. Occupants who are
notwearing their seat belt, are not seated
properly or are too close to the air bag can be
seriously injured or killed by an air bag, as it
inflates with great force instantaneously:
R
sit with the seat belt fastened correctly and
in a position that is as upright as possible
with your back against the backrest.
R
move the driver's seat as far back as
possible, still permitting proper operation
of vehicle controls. The distance from the
center of the driver's chest to the center of
the air bag cover on the steering wheel
must be at least 10 inches (25 cm). You
should be able to accomplish this by
adjusting the seat and steering wheel. If
you have any difficulties, please contact an
authorized Mercedes-Benz Center.
R
do not lean your head or chest close to the
steering wheel or dashboard.
R
only hold the steering wheel on the outside.
Placing hands and arms inside the rim can
increase the risk and potential severity of
hand/arm injury if the driver front air bag
inflates.
R
adjust the front-passenger seat as far back
as possible from the dashboard when the
seat is occupied.
R
occupants, especially children, should
never place their bodies or lean their heads
in the area of the door where the side
impact air bag inflates.This could result in
serious or fatal injuries should the side
impact air bag be deployed. Always sit as
upright as possible, wear the seat belt
properly and use an appropriately sized
infant restraint, toddler restraint or booster
seat recommended for the size and weight
of the child.
Failure to follow these instructions can result
in severe injuries to you or other occupants.
If you sell your vehicle, it is important that you
make the buyer aware of this safety
information. Be sure to give the buyer this
Operator's Manual.
G
WARNING
Accident research shows that the safest place
for children in an automobile is in a rear seat.
Aside impact air bag related injury may occur
if occupants, especially children, are not
properly seated or restrainedwhen next to a
side impact air bag which needs to deploy
rapidly in a side impact in order to do its job.
To help avoid the possibility of injury, please
follow these guidelines:
(1) Always sit as upright as possible
and use the seat belts properly.
Make sure that children 12 years
old and under use an appropriately
sized child restraint, infant
restraint, or booster seat
recommended for the size and
weight of the child.
(2) Always wear seat belts properly.
The air bags are only deployed if the air bag
control unit detects the need for deployment.
Only in the event of such a situation, will the
air bags provide their supplemental
protection.
If the driver and front passenger do not wear
their seat belts, it is not possible for the air
bags to provide their supplemental
protection.
In the event of other types of impacts and
impacts below air bag deployment
thresholds, the air bags will not deploy.The
driver and passenger will then be protected
to the extentpossible by a properly fastened
seat belt. Aproperly fastened seat beltis also
needed to provide the best possible
protection if the vehicle rolls over.
Air bags are not a substitute for seat belts.
Always wear your seat belt, regardless of
whether or not your vehicle is equipped with
air bags.
Occupant safety
43
Safety
Z
It is important to yoursafety and that of your
passenger to have deployed air bags replaced
and to have any malfunctioning air bags
repaired. This will help to make sure the air
bags will continue to provide supplemental
crash protection for occupants .
Front air bags
The frontair bags increase protection for the
driver's and front-passenger's head and
chest.
Driver's air bag : deploys in front of the
steering wheel; front-passenger front air
bag ; deploys in front of and above the glove
box.
They are deployed:
R
in the event of certain frontal impacts
R
if the system determines that air bag
deploymentcan offer additional protection
to that provided by the seat belt
R
if the seat belt is fastened
R
independently of other air bags in the
vehicle
Your vehicle has adaptive, two-stage frontair
bags. In the eventofacollision, the airbag
control unit evaluates the vehicle
deceleration. In the first deploymentstage,
the front airbag is filled with enough
propellantgas to reduce therisk of injuries.
The front air bag is fully deployed if a second
deploymentthreshold is exceeded within a
few milliseconds.
The deployment of the front-passenger front
air bag is also influenced by the weight
category of the front passenger, which is
determined by the Occupant Classification
System (OCS) (Y page 47).
The lighter the passenger-side occupant, the
higher the vehicle deceleration rate required
(predicted at the start of the impact) for
second stage inflation of the front-passenger
front air bag. In the second stage, the front
air bags are inflated with the maximum
amount of propellant gas available.
The front air bags are not deployed in
situations where a low impact severity is
predicted. You will then be protected by the
fastened seat belt.
The front-passenger front air bag will only be
deployed if:
R
the system, based on the OCS weight
sensor readings, detects that the front-
passenger seat is occupied
R
the 45 indicator lamp on the center
console is not lit (Y page 47)
R
the air bag control unit predicts a high-
impact severity.
Driver's knee bag
Driver's knee bag : increases the driver's
protection against:
R
knee injuries
R
thigh injuries
R
lower leg injuries
Driver's knee bag : deploys under the
steering column. If, during a frontal collision,
the system determines that air bag
deployment can offer additional protection to
44
Occupant safety
Safety
thatprovided by the seat belt, driver's knee
bag : is deployed along with the driver's air
bag.Driver's knee bag : operates best in
conjunction with correctly positioned and
fastened seat belts.
Side impact air bags
G
WARNING
The pressure sensors for side impact air bag
control are located in the doors. Do not
modify any components of the doors or door
trim panels including, for example, the
addition of door speakers.
Improper repair work on the doors or the
modification or addition of components to the
doors create a risk of rendering the side
impact air bags inoperative or causing
unintended air bag deployment. Work on the
doors must therefore only be performed by
qualified technicians. Contact an authorized
Mercedes-Benz Center.
G
WARNING
Only use seat covers which have been tested
and approved by Mercedes-Benz for your
vehicle model.Using seat covers or other seat
coverings can cause a malfunction of the side
impact air bags and/or the pelvis air bags.
Contact an authorized Mercedes-Benz Center
for availability.
When deployed, the side impact air bags offer
additional protection for the thorax of the
vehicle occupants on the side of the vehicle
on which the impact occurs. However, they
do not protect the:
R
head
R
neck
R
arms
Front side impact air bags : and rear side
impact air bags ; deploy next to the outer
seat cushions.
The side impact air bags are deployed:
R
on the side on which an impact occurs
R
at the start of an accident with a high rate
of lateral vehicle deceleration or
acceleration, e.g. in aside impact
R
independently of the use of the seat belt
R
independently of the front air bags
R
independently of the ETDs
Side impactair bags will not deploy in side
impacts which do not exceed the system's
presetdeployment thresholds for lateral
acceleration/deceleration.You will then be
protected by the fastened seat belt.
The side impact air bag on the front-
passenger side is not deployed in the
following situations:
R
OCS has detected that the front-passenger
seat is unoccupied.
R
the front-passenger seat belt is not
fastened.
The side impact air bag on the front-
passenger side will deploy if the front-
passenger seat belt is fastened, regardless of
whether the front-passenger seat is occupied
or not.
Pelvis air bags
Pelvis air bags are not available for AMG
vehicles.
Occupant safety
45
Safety
Z
G
WARNING
Only use seat covers which have been tested
and approved by Mercedes-Benz for your
vehicle model.Using seat covers or other seat
coverings can cause a malfunction of the side
impact air bags and/or the pelvis air bags.
Contact an authorized Mercedes-Benz Center
for availability.
Pelvis air bag deployment enhances the level
of protection of the vehicle occupants on the
side of the vehicle on which the impact
occurs.
Pelvis air bags : deploy next to and below
the outer seat cushions. They are deployed:
R
on the side on which an impact occurs
R
at the start of an accident with a high rate
of lateral vehicle deceleration or
acceleration, e.g. in aside impact
R
independently of the use of the seat belt
R
independently of the front air bags
R
independently of the ETDs
Pelvis air bags : will not deploy in side
impacts which do not exceed the system's
presetdeployment thresholds for lateral
acceleration/deceleration.You will then be
protected by the fastened seat belt.
The pelvis air bag on the front-passenger side
is not deployed in the following situations:
R
OCS has detected that the front-passenger
seat is unoccupied.
R
the front-passenger seat belt is not
fastened.
The pelvis air bag on the front-passenger side
will deploy if the front-passenger seat belt is
fastened, regardless of whether the front-
passenger seat is occupied or not.
Window curtain air bags
The window curtain air bags enhance the level
of protection for the head, but not chest or
arms, of the vehicle occupants on the side of
the vehicle on which the impact occurs.
The window curtain air bags are integrated
into the side of the roof frame and deploy in
the area from the A-pillar to the C-pillar.
Window curtain air bags : are deployed:
R
on the side on which an impact occurs
R
at the start of an accident with a high rate
of lateral vehicle deceleration or
acceleration, e.g. in aside impact
R
regardless of whether the front-passenger
seat is occupied
R
independently of the use of the seat belt
R
independently of the front air bags
Window curtain air bags : will not deploy in
the eventofimpacts which do not exceed the
system's preset deployment thresholds for
vehicle acceleration/deceleration. You will
then be protected by the fastened seat belt.
46
Occupant safety
Safety
Occupant Classification System
(OCS)
How the Occupant Classification
System works
The Occupant Classification System (OCS)
categorizes the occupant on the front-
passenger seat by means of a weight sensor.
The front-passenger frontair bag is
deactivated automatically for certain weight
categories. The 45 indicator lamp
shows you the current status. If the
45 indicator lamp lights up, the front-
passenger air bag is disabled.
The system does not deactivate:
R
the side impactair bag
R
the pelvis air bag
R
the window curtain air bag
R
the Emergency Tensioning Devices
To be classified correctly, the front passenger
must sit:
R
with the seat belt fastened correctly
R
in a position that is as upright as possible
with their back against the seat backrest
R
with their feet on the floor
If the front-passenger's weight is transferred
to another object in the vehicle (e.g.by
leaning on armrests), OCS may not be able to
approximate the occupant's weight category.
If the front-passenger seat, the seat cover or
the seat cushionare damaged, have the
necessary repair work carried out at an
authorized Mercedes-Benz Center.
For safety reasons, Mercedes-Benz
recommends that you only use seat
accessories that have been approved by
Mercedes-Benz.
Both the driverand the front passenger
should always observe the 45
indicator lamp to determine whetherornot
the front passenger is positioned correctly.
G
WARNING
If the 45 indicator lamp illuminates
when an adult or someone larger than a small
individual is in the front passenger seat, have
the front passenger reposition himself or
herself in the seat until the 45
indicator lamp goes out.
In the event of a collision, the air bag control
unit will not allow front passenger front air bag
deployment when the OCS has classified the
front passenger seat occupant as weighing as
much as or less than a typical 12-month-old
child in a standard child restraint or if the front
passenger seat is classified as being empty.
When the OCS senses that the front
passenger seat occupant is classified as
being up to or less than the weight of a typical
12-month-old child in a standard child
restraint, the 45 indicator lamp will
illuminate when the engine is started and
remain illuminated. This indicates that the
front passenger front air bag is deactivated.
When the OCS senses that the front
passenger seat is classified as being empty,
the 45 indicator lamp will illuminate
when the engine is started and remain
illuminated. This indicates that the front
passenger front air bag is deactivated.
When the OCS senses that the front
passenger seat occupant is classified as
being heavier than the weight of a typical 12-
month-old child seated in astandard child
restraint or as being a small individual (such
as a young teenager or asmall adult), the
45 indicator lamp will illuminate for
approximately 6seconds when the engine is
started. Depending on occupant weight
sensor readings from the seat, it will then
remain illuminated or go out. With the
45 indicator lamp illuminated, the
frontpassenger frontair bag is deactivated.
With the 45 indicator lamp out, the
front passenger front air bag is activated.
When the OCS senses that the front
passenger seat occupant is classified as an
adult or someone larger than a small
individual, the 45 indicator lamp will
illuminate for approximately six seconds
when the engine is started and thengo out.
Occupant safety
47
Safety
Z
This indicates that the front passenger front
air bag is activated.
If the 45 indicator lamp is illuminated,
the front passenger front air bag is
deactivated and will not be deployed.
If the 45 indicator lamp is not
illuminated, the front passenger front air bag
is activated and will be deployed
R
in the event of certain frontal impacts
R
if the impact exceeds a predetermined
triggering threshold
R
independent of the side impact air bag or
pelvis air bag
If the front passenger front air bag is
deployed, the rate of inflation will be
influenced by
R
the rate of vehicle deceleration as assessed
by the air bag control unit
R
the front passenger's weight category as
identified by the OCS
For further information, see "Air bag display
messages" (Y page 223).
G
WARNING
According to accident statistics, children are
safer when properly restrained on the rear
seats than on the front-passenger seat. Thus,
we strongly recommend that children be
placed in the rear seats whenever possible.
Regardless of seating position, children 12
years old and under must be seated and
properly secured in an appropriate infant
restraint, toddler restraint, or booster seat
recommended for the size and weight of the
child.
The infant or child restraint must be properly
secured with the vehicle's seat belt, the seat
belt and Top Tether strap, or lower anchors
and Top Tether strap, fully in accordance with
the child seat manufacturer's instructions.
Occupants, especially children, should always
sit as upright as possible, wear the seat belt
properly and use an appropriately sized infant
restraint, toddler restraint, or booster seat
recommended for the size and weight of the
child.
Children can be killed or seriously injured by
an inflating air bag. Note the following
important information when circumstances
require you to place a child in the front-
passenger seat:
R
Your vehicle is equipped with air bag
technology designed to deactivate the
front-passenger front air bag in your vehicle
when the system senses the weight of a
typical 12-month-old child or less along
with the weight of a standard appropriate
child restraint on the front-passenger seat.
R
Achild in a rear-facing child restraint on the
front-passenger seat will be seriously
injured or even killed if the front-passenger
front air bag inflates in a collision which
could occur under some circumstances,
even with the air bag technology installed
in your vehicle. The only means to eliminate
this risk completely is never to place a child
in a rear-facing child restraint in the front-
passenger seat. We therefore strongly
recommend that you always place a child
in a rear-facing child restraint on the rear
seat.
R
If you install a rear-facing child restraint on
the front-passenger seat, make sure the
45 indicator lamp is illuminated,
indicating that the front-passenger front air
bag is deactivated. Should the 45
indicator lamp not illuminate or go out while
the restraint is installed, please check
installation. Periodically check the
45 indicator lamp while driving to
make sure that the 45 indicator
lamp is illuminated. If the 45
indicator lamp goes out or remains out, do
not transport a child on the front-passenger
seat until the system has been repaired.
Achild in a rear-facing child restraint on the
front-passenger seat will be seriously
injured or even killed if the front-passenger
front air bag inflates.
48
Occupant safety
Safety
R
If you place a child in a forward-facing child
restraint on the front-passenger seat:
-
move the seat as far back as possible
-
use the proper child restraint
recommended for the age, size and
weight of the child
-
secure child restraint with the vehicle's
seat belt according to the child seat
manufacturer's instructions
R
For children larger than the typical 12-
month-old child, the front-passenger front
air bag may or may not be activated.
If the driver's air bag deploys, this does not
mean that the front-passenger front air bag
will also deploy.
The OCS may have detected that the seat:
R
is either empty or occupiedby a person
with a weight up to that of a typical twelve-
month-old child seated in astandard child
restraint
R
is occupied by a small individual, such as a
young teenager or a small adult
R
is occupied by a child in a child restraint
system, whose weight is greaterthan that
of a typical twelve-month-old child.
These are examples of when the OCS
deactivates the front-passenger front air bag.
Deactivation takes place although the
collision fulfills the criteria for deploying the
driver's air bag.
If the SmartKey has been removed from the
ignition lock or is in position 0, the
45 indicator lamp : does not light
up.
G
WARNING
If the red 6 SRS warning lamp in the
instrument cluster and the 45
indicator lamp light up simultaneously, the
OCS is malfunctioning. The front passenger
front air bag will be deactivated in this case.
Have the system checked by qualified
technicians as soon as possible. Contact an
authorized Mercedes-BenzCenter.
Only have the seat repaired or replaced at an
authorized Mercedes-Benz Center.
In order to ensure proper operation of the air
bag system and OCS:
R
Sit with the seat belt properly fastened in a
position that is as upright as possible with
your back against the seat backrest.
R
When seated, a passenger should not
position him/herself in such a way as to
cause the passenger's weight to be lifted
from the seat cushion as this may result in
the OCS being unable to correctly
approximate the passenger's weight
category.
R
Read and observe all warnings in this
chapter.
System self-test
The 45 indicator lamp lights up if you:
R
turn the SmartKey to position 1 or 2 in the
ignition lock
R
on vehicles with KEYLESS-GO, press the
Start/Stop button once or twice
When an adult is sitting correctly on the front-
passenger seat and is categorized by the OCS
system as an adult, the 45 indicator
lamp lights up and goes off again after
approximately six seconds.
If the passenger seat is not occupied and the
OCS system detects this, the 45
indicator lamp remains lit and does not go off.
Occupant safety
49
Safety
Z
G
WARNING
If the 45indicator lamp does not
illuminate, the system is not functioning. You
must contact an authorized Mercedes-Benz
Center before seating any child on the front
passenger seat.
For further information, see "Problems with
the Occupant Classification System"
(Y page 51).
G
WARNING
Never place anything betweenseat cushion
and child seat (e.g. a pillow), since it reduces
the effectiveness of the OCS. The underside
and rear side child restraint system must be
placed entirely on the seat cushion and the
backrest of the front-passenger seat
backrest.
If necessary, adjust the tilt of the passenger
seat backrest.
An incorrectly mounted child seat could cause
injuries to the child in case of an accident,
instead of increasing protection for the child.
Follow the manufacturer's instructions for
installation of child restraint systems.
50
Occupant safety
Safety
Problems with the Occupant Classification System
Problem Possible causes/consequences and M Solutions
The 45
indicator lamp lights up
and stays on.
The person on the
front-passenger seat:
R
has the weight of a
typical adult
R
has been determined
by the system not to
be a child
The OCS is malfunctioning.
X
Have the OCS checked as soon as possible at an authorized
Mercedes-Benz Center.
X
Observe the additional display messages in the multifunction
display (Y page 223).
G
WARNING
If the 45 indicator lamp illuminates and remains illuminated when the weight of a typical
adult or someone larger than a small individual has been detected on the passenger seat, do not
allow any occupant to use the passenger seat until the system has been repaired.
Problem Possible causes/consequences and M Solutions
The 45
indicator lamp does not
light up and/or does
not stay on.
The front-passenger
seat is:
R
unoccupied
R
occupied with a
weight up to that of a
typical twelve-
month-old child in a
standard child
restraint system
The OCS is malfunctioning.
X
Make sure there is nothing between the seat cushion and the
child seat.
X
Check the installation of the child restraint system.
X
Make sure that no objectsare applying additional weight onto
the seat.
X
If the 45 indicator lamp remains off, have the OCS
system checked as soon as possible at an authorized Mercedes-
Benz Center. Do not transport a child on the front-passenger
seat as long as the OCS is not functioning.
X
Observe the additional display messages in the multifunction
display (Y page 223).
G
WARNING
If the 45 indicator lamp does not illuminate or remains out with the weight of a typical
12-month-old child in a standard child restraint or less, or is unoccupied, on the front-passenger
seat, do not transport achild on the front-passenger seat until the system has been repaired.
Occupant safety
51
Safety
Z
PRE-SAFE
®
(anticipatory occupant
protection system)
G
WARNING
The PRE-SAFE
®
system reduces the impact of
an accident on vehicle occupants, as long as
their seat belts have been fastened correctly.
Although your vehicle is equipped with a PRE-
SAFE
®
system, the possibility of injury in the
event of an accident cannot be ruled out. You
should therefore always drive carefully and
adapt your driving style to the prevailing road,
weather and traffic conditions.
PRE-SAFE
®
takes preemptive measures to
protect occupants in certain hazardous
situations.
PRE-SAFE
®
intervenes:
R
if BAS PLUS intervenes powerfully on
vehicles with DISTRONIC PLUS
R
if, on vehicles with DISTRONIC PLUS, the
radar sensor system detectsanimminent
dangerofcollision in certain situations
R
in critical driving situations, e.g. when
physical limits are exceeded and the
vehicle understeers or oversteers severely
PRE-SAFE
®
takes the following measures
depending on the hazardous situation
detected:
R
the front seat belts are pre-tensioned.
R
on vehicles with memory function for the
front-passenger seat: the front-passenger
seat is adjusted if it is in an unfavorable
position.
R
if the vehicle skids, the sliding sunroof,
panorama roof with power tilt/sliding
panel and the side windows are closed so
that only a small gap remains.
If the hazardous situation passes without
resulting in an accident, PRE-SAFE
®
slackens
the belt pre-tensioning. All settings made by
PRE-SAFE
®
can then be reversed.
If the seat belts are not released:
X
When the vehicle is stationary, move the
backrest or seat back slightly.
The seat belt pre-tensioning is reduced and
the locking mechanism is released.
G
WARNING
Make sure that nobody can become trapped
as you adjust the seat.
!
Make sure that there are no objects in the
footwell or behind the seats when resetting
the seats. There is a risk that the seats
and/or the objects could be damaged.
More information about seat belt adjustment,
a convenience function integrated into PRE-
SAFE
®
, can be found in the "Seat belt
adjustment" section (Y page 56).
NECK-PRO head restraints/NECK-
PRO luxury head restraints (except
AMG vehicles)
NECK-PRO head restraints/NECK-PRO luxury
head restraints increase protection of the
driver's and front-passenger's head and
neck. In the event of a rear collision of a
certain severity, the NECK-PRO head
restraints/NECK-PRO luxury head restraints
on the driver's and the front-passenger seats
are moved forwards and upwards. This
provides better head support.
G
WARNING
Do not attach any objects (e.g. a coat hanger)
to the NECK-PRO head restraints/NECK-PRO
luxury head restraints. Otherwise, the NECK-
PRO head restraints/NECK-PRO luxury head
restraints may not function properly and in
the event of a rear-end collision may not offer
the protection they are designed to provide.
G
WARNING
Seat or head restraint covers can cause a
malfunction when the NECK-PRO head
restraints/NECK PRO luxury head restraints
are activated or when the side impact air bags
52
Occupant safety
Safety
or pelvis air bags are deployed, or they can
prevent this completely. The NECK-PRO head
restraints/NECK PRO luxury head restraints
or side impact air bags/pelvis air bags can
therefore not provide the intended protection.
Do not use any seat or head restraint covers.
If the NECK-PRO head restraints/NECK-PRO
luxury head restraints have been triggered in
an accident, reset the NECK-PRO head
restraints/NECK-PRO luxury head restraints
on the driver's and front-passenger seats
(Y page 53). Otherwise, the additional
protection will not be available in the event of
another rear-end collision. NECK-PRO head
restraints/NECK-PRO luxury head restraints
that have been triggered are moved forwards
and can no longer be adjusted.
G
WARNING
For your protection, drive only with properly
positioned head restraints.
Adjust the head restraint so that it is as close
to the head as possible and the center of the
head restraint supports the back of the head
at eye level. This will reduce the potential for
injury to the head and neck in the event of an
accident or similar situation.
Resetting triggered NECK-PRO head
restraints/NECK-PRO luxury head
restraints
Important safety notes
G
WARNING
For reasons of safety, have the NECK-PRO
head restraints/NECK-PRO luxury head
restraints checked at an authorized
Mercedes-Benz Center after a rear-end
collision.
G
WARNING
When pushing back the NECK-PRO head
restraint cushion, make sure your fingers do
not become caught between the head
restraint cushion and the cover. Failure to
observe this could result in injuries.
NECK-PRO head restraints
i
Resetting the NECK-PRO head restraints
requires a lot of strength. If you have
difficulty resetting the NECK-PRO head
restraints, have this work carried out at a
qualified specialist workshop, e.g. an
authorized Mercedes-Benz Center.
X
Tilt the top of the NECK-PRO head restraint
cushion forwards in the direction of
arrow :.
X
Push the NECK-PRO head restraint cushion
down in the direction of arrow ; as far as
it will go.
X
Firmly push the NECK-PRO head restraint
cushion back in the direction of arrow =
until the cushion engages.
X
Repeat this procedure for the second
NECK-PRO head restraint.
NECK-PRO luxury head restraints
i
If you have difficulty resetting the NECK-
PRO luxury head restraints, have this work
carried out at a qualified specialist
workshop, e.g. an authorized Mercedes-
Benz Center.
Occupant safety
53
Safety
Z
X
Remove resetting tool : from the vehicle
documentwallet.
X
Slide resetting tool : into guide ;
between the NECK-PRO luxury head
restraint and the rear cover of the head
restraint.
X
Push resetting tool : downwards until you
hear the head restraint deployment
mechanism engage.
X
Pull out resetting tool :.
X
Firmly press the NECK-PRO luxury head
restraint cushion back = until it engages.
X
Repeat this procedure for the second
NECK-PRO luxury head restraint.
X
Put resetting tool : back into the vehicle
documentwallet.
Seat belts
Important safety notes
The use of infant or child restraints is required
by law in all 50 states, the District of
Columbia, all U.S. territories and all Canadian
provinces.
Even where this is notthe case, all vehicle
occupants should have their seat belts
fastened when the vehicle is in motion.
i
See "Children in the vehicle"
(Y page 58) for further information on
infants and children traveling in the vehicle
as well as on child restraint systems.
G
WARNING
Always fasten your seat belt before driving off.
Always make sure all of your passengers are
properly restrained. You and your passengers
should always wear seat belts.
Failure to wear and properly fasten and
position your seat belt greatly increases your
risk of injuries and their likely severity in an
accident.
If you are ever in an accident, your injuries can
be considerably more severe without your
seat belt properly buckled. Without your seat
belt buckled, you are much more likely to hit
the interior of the vehicle or be ejected from
it. You can be seriously injured or killed.
In the same crash, the possibility of injury or
death is lessened if you are properly wearing
your seat belt. The air bags can only protect
as intended if the occupants are properly
wearing their seat belts.
G
WARNING
Never ride in a moving vehicle with the seat
backrest in an excessively reclined position as
this can be dangerous. You could slide under
the seat belt in a collision. If you slide under
it, the seat belt would apply force at the
abdomen or neck.That could cause serious
or even fatal injuries. The seat backrest and
seat belt provide the best restraint when the
wearer is in a position that is as upright as
possible and the seat belt is properly
positioned on the body.
G
WARNING
Never let more people ride in the vehicle than
there are seat belts available. Make sure
everyone riding in the vehicle is correctly
restrained with a separate seat belt. Never
use a seat belt for more than one person at a
time.
G
WARNING
Damaged seat belts or seat belts that have
been subjected to stress in an accident must
54
Occupant safety
Safety
be replaced and their anchoring points must
also be checked.
Only use seat belts which have been approved
by Mercedes-Benz.
Do not make any modifications to the seat
belts. This can lead to unintended activation
of the ETDs or to their failure to activate when
necessary.
Do not bleach or dye seat belts as this may
severely weaken them. In a crash they may
not be able to provide adequate protection.
Have all work carried out only by qualified
technicians. Contact an authorized
Mercedes-Benz Center.
Correct use of the seat belts
G
WARNING
USE SEAT BELTS PROPERLY
R
Seat belts can only work when used
properly. Never wear seat belts in any other
way than as described in this section, as
that could result in serious injuries in the
event of an accident.
R
Each occupant should wear their seat belt
at all times, because seat belts help reduce
the likelihood of and potential severity of
injuries in accidents, including rollovers.
The integrated restraint system includes
SRS (driver frontair bag, driver's side knee
bag, front-passengerfront air bag, side
impact air bags, pelvis air bags, window
curtain air bags for the side windows),
Emergency Tensioning Devices, seat belt
force limiters, and front seat knee bolsters.
The system is designed to enhance the
protection offered to properly belted
occupants in certain frontal (front air bags,
driver's side knee bag, and ETDs) and side
(side impact air bags, pelvisair bags,
window curtain air bags, and ETDs) impacts
which exceed presetdeployment
thresholds.
R
Never wear the shoulder belt under your
arm, across your neck or off your shoulder.
In a frontal crash, your body would move
too far forward. That would increase the
chance of head and neck injuries. The seat
belt would also apply too much force to the
ribs or abdomen, which could severely
injure internal organs such as your liver or
spleen.
Adjust the seat belt so that the shoulder
section is located as close as possible to
the middle of the shoulder. It should not
touch the neck.Never pass the shoulder
portion of the seat belt under your arm.
R
Position the lap belt as low as possible on
your hips and not across the abdomen. If
the lap belt is positioned across your
abdomen, it could cause serious injuries in
a crash.
R
Never wear seat belts over rigid or
breakable objects in or on your clothing,
such as eyeglasses, pens, keys etc., as
these might cause injuries.
R
Make sure the seat belt is always fitted
snugly. Take special care of this when
wearing loose clothing.
R
Never use a seat belt for more than one
person at a time. Do not fasten a seat belt
around a person and another person or
other objects at the same time.
R
Seat belts should not be worn twisted. In a
crash, you would not have the full width of
the seat belt to distributeimpact forces.
The twisted seat belt against yourbody
could cause injuries.
R
Pregnant women should also always use a
lap-shoulder belt. The lap belt portion
should be positioned as low as possible on
the hips to avoid any possible pressure on
the abdomen.
R
Place the seat backrest in a position that is
as upright as possible.
R
Check your seat belt during travel to make
sure it is properly positioned.
R
Never place your feet on the instrument
panel, dashboard, or on the seat. Always
Occupant safety
55
Safety
Z
keep both feet on the floor in front of the
seat.
R
Whenusing a seat belt to secure infant
restraints, toddler restraints, or children in
booster seats, always follow the child seat
manufacturer's instructions.
G
WARNING
Do not pass seat belts over sharp edges. They
could tear.
Do not allow the seat belt to get caught in the
door or in the seat adjustment mechanism.
This could damage the seat belt.
Never attempt to make modifications to seat
belts. This could impair the effectiveness of
the seat belts.
Fastening seat belts
G
WARNING
According to accident statistics, children are
safer when properly restrained on the rear
seats than on the front-passenger seat. Thus,
we strongly recommend that children be
placed in the rear seat whenever possible.
Regardless of seating position, children 12
years old and under must be seated and
properly secured in an appropriately sized
child restraint system or booster seat
recommended for the size and weight of the
child. For additional information, see the
"Children in the vehicle" section.
Achild's risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and/
or the child is not properly secured in the child
restraint.
X
Adjust the seat and move the backrest to
an almost vertical position (Y page 94).
X
Pull the seat belt smoothly through belt
sash guide :.
X
Without twisting it, guide the shoulder
section of the seat belt across the middle
of your shoulder and the lap section across
your pelvis.
X
Engage belt tongue ; in buckle =.
X
If necessary, adjust the seat belt to the
appropriate height (Y page 57).
X
If necessary, pull upwards on the shoulder
section of the seat belt to tighten the belt
across your body.
All seat belts except the driver's seat belt are
equipped with a special seat belt retractor to
securely fasten child restraint systems in the
vehicle. For further information on special
seat belt retractors, see (Y page 61).
For more information about releasing the seat
belt with release button ?, see "Releasing
seat belts" (Y page 57).
Seat belt adjustment
The seat-belt adjustment function adjusts the
driver's and front-passenger seat belt to the
upper body of the occupants.
56
Occupant safety
Safety
The belt strap is tightened slightly when:
R
you engage the belt tongue in the belt
buckle and you then turn the SmartKey to
position 2 in the ignition lock.
The seat-belt adjustmentisanintegral part of
the PRE-SAFE
®
convenience function. More
information about PRE-SAFE
®
can be found
in the "PRE-SAFE
®
(anticipatory occupant
protection system)" section(Ypage 52).
Belt height adjustment
You can adjust the seat belt height on the
driver's seat and the front-passenger seat.
Adjust the height so that the upper part of the
seat belt is routed across the center of your
shoulder.
X
To raise: slide the belt sash guide upwards.
The belt sash guide engages in various
positions.
X
To lower: press and hold belt sash guide
release :.
X
Slide the belt sash guide downwards.
X
Release belt sash guide release : and
make sure that the belt sash guide has
engaged.
Releasing seat belts
X
Press release button ?(Y page 56) and
guide belt tongue ; back towards belt
sash guide :.
!
Make sure that the seat belt is fully rolled
up. Otherwise, the seat belt or belt tongue
will be trapped in the door or in the seat
mechanism. This could damage the door,
the door trim panel and the seat belt.
Damaged seat belts can no longer fulfill
their protective function and must be
replaced. Visit a qualified specialist
workshop.
Belt warning for the driver and front
passenger
Regardless of whether the driver's and front-
passenger seat belts have already been
fastened, the 7 seat belt warning lamp
lights up for six seconds each time the engine
is started. It then goes out if the driver and
the frontpassenger have already fastened
their seat belts.
If the driver's seat belt is notfastened when
the engine is started, an additional warning
tone will sound. This warning tone stops after
a maximum of six seconds or once the
driver's seat belt is fastened.
If after six seconds the driver or front
passenger have notfastened their seat belts
and the doors are closed, the 7 seat belt
warning lamp lights up:
R
until the driver's or frontpassenger's seat
belt is fastened
R
if a vehicle speed of 15 mph (25 km/h) is
exceeded, a warning tone also sounds with
increasing intensity for a maximum of
60 seconds or until the driver or front-
passenger seat belt has been fastened.
If the driver/front passenger unfasten their
seat belt while the vehicle is in motion, the
7 seat belt warning lamp lights up and a
warning tone sounds again.
The warning tone ceases evenifthe driver or
front-passenger seat belt has still not been
fastened after 60 seconds. The 7 seat belt
warning lamp stops flashing but remains
illuminated.
After the vehicle comes to a standstill, the
warning tone is reactivated and the 7 seat
Occupant safety
57
Safety
Z
belt warning lamp flashes again if the vehicle
speed again exceeds 15 mph (25 km/h).
The 7 seat belt warning lamp only goes
out if:
R
both the driver and the frontpassenger
have fastened their seat belts.
or
R
the vehicle is stationary and a door is open.
i
For more information on the 7 seat
belt warning lamp, see "Warning and
indicator lamps in the instrument cluster,
seat belts" (Y page 242).
Emergency Tensioning Devices, seat
belt force limiters
The seat belts for the frontseats and rear
outer seats are equipped with ETDs and seat
belt force limiters.
The ETDs tighten the seat belts in an accident,
pulling them close against the body.
The ETDs do not correct incorrect seat
positions or incorrectly fastened seat belts.
The ETDs do not pull vehicle occupants back
towards the backrest.
When triggered, the seat belt force limiters
help to reduce the peak force exerted by the
seat belt on the vehicle occupant.
The seat belt force limiters for the frontseats
are synchronized with the frontair bags.
These take on a part of the deceleration force.
They take on a part of the deceleration force,
resulting in the force exerted on the occupant
being distributed over a greater area.
The ETDs can only be activated when:
R
the ignition is switched on
R
the restraint systems are operational; see
"SRS warning lamp" (Y page 41).
R
the belt tongue is engaged in the buckle on
each of the lap-shoulder belts in the front
R
the front-passenger seat is occupied and
the belt tongue is engaged in the buckle on
the front-passenger side
The ETDs on the outside seats in the rear
compartmentare triggered independently of
the lock status of the seat belts.
The Emergency Tensioning Devices are
triggered depending on the type and severity
of an accident, if:
R
in the event of a head-on or rear-end
collision, the vehicle decelerates or
accelerates rapidly in a longitudinal
direction during the initialstages of the
impact
R
in the event of a side impact, the vehicle
decelerates or accelerates rapidly in a
lateral directiononthe side opposite the
impact
If the ETDs are deployed, you will hear a bang,
and a small amount of powder may also be
released. Only in rare cases will the bang
affect your hearing. The powder that is
released generally does not constitute a
health hazard. The 6 SRS warning lamp
lights up.
G
WARNING
Pyrotechnic ETDs that were activated must be
replaced.
For your safety, when disposing of the
pyrotechnic ETDs always follow our safety
instructions. These are available at any
authorized Mercedes-BenzCenter.
!
If the front-passenger seat is not
occupied, do not engage the seat belt
tongue in the buckle on the front-
passenger seat. Otherwise, the Emergency
Tensioning Device could be triggered in the
event of an accident.
Children in the vehicle
Child restraint systems
Important safety notes
We recommend that all infants and children
be properly secured in an infantorchild
58
Children in the vehicle
Safety
restraint system at all times while the vehicle
is in motion.
The use of seat belts and infant and child
restraint systems is required by law in all 50
states, the District of Columbia, the U.S.
territories and all Canadian provinces.
Infants and small children must be seated in
an appropriate infant or child restraint system
recommended for the size and weight of the
child.The infant or child restraint system
must be properly secured in accordance with
the manufacturer's instructions. All infant or
child restraint systems must comply with the
U.S. Federal Motor Vehicle Safety Standards
213 and 225 and Canadian Motor Vehicle
Safety Standards 213 and 210.2.
Confirmation that the child restraint system
corresponds to the standards can be found
on an instruction label on the child restraint
system. This confirmation can also be found
in the installation instructions that are
included with the child restraint system.
Always read and follow the manufacturer's
instructions when using an infant or child
restraint system or booster seat.
Observe all warning signs in the vehicle
interior and on the infant or child restraint.
G
WARNING
According to accident statistics, children are
safer when properly restrained in the rear
seating positions than in the front seating
position. Thus, we strongly recommend that
children be placed in the rear seats whenever
possible. Regardless of seating position,
children 12 years old and under must be
seated and properly secured in an appropriate
infant restraint, toddler restraint, or booster
seat recommended for the size and weight of
the child.
The infant or child restraint must be properly
secured with the vehicle's seat belt, the seat
belt and top tether strap, or lower anchors and
top tether strap, fully in accordance with the
child seat manufacturer's instructions.
Occupants, especially children, should always
sit as upright as possible, wear the seat belt
properly and use an appropriately sized infant
restraint, toddler restraint, or booster seat
recommended for the size and weight of the
child.
Children can be killed or seriously injured by
an inflating air bag. Note the following
important information when circumstances
require you to place a child in the front
passenger seat:
R
Your vehicle is equipped with air bag
technology designed to deactivate the front
passenger front air bag in your vehicle
when the system senses the weight of a
typical 12-month-old child or less along
with the weight of a standard appropriate
child restraint on the front passenger seat.
R
For children larger than the typical
12-month-old child, the front passenger
front air bag may or may not be activated.
Always make sure the 45indicator
lamp is illuminated, indicating that the front
passenger front air bag is deactivated.
R
Achild in a rear-facing child restraint on the
front passenger seat will be seriously
injured or even killed if the front passenger
front air bag inflates in a collision which
could occur under some circumstances,
even with the air bag technology installed
in your vehicle. The only means to
completely eliminate this risk is to never
place a child in a rear-facing child restraint
in the front seat. We therefore strongly
recommend that you always place a child
in a rear-facing child restraint in a backseat.
R
If you must install a rear-facing child
restraint on the front passenger seat
because circumstances require you to do
so, make sure the 45indicator
lamp is illuminated, indicating that the front
passenger front air bag is deactivated.
Should the 45indicator lamp not
illuminate or go out while the restraint is
installed, please checkinstallation.
Periodically check the 45indicator
lamp while driving to make sure the 4
5 indicator lamp is illuminated. If the
Children in the vehicle
59
Safety
Z
45indicator lamp goes out or
remains out, do not transport a child on the
front passenger seat until the system has
been repaired.
Achild in a rear-facing child restraint on the
front passenger seat will be seriously
injured or even killed if the front passenger
front air bag inflates.
R
If you have to place a child in a forward-
facing child restraint on the front passenger
seat, move the seat as far back as possible,
use the proper child restraint
recommended for the age, size and weight
of the child, and secure child restraint with
the vehicle's seat belt according to the
child seat manufacturer's instructions.
G
WARNING
Infants and small children should never share
a seat belt with another occupant. In the event
of an accident, they could be crushed
between the occupant and seat belt.
Achild's risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and/
or the child is not properly secured in the child
restraint.
Children that are too large for a child restraint
must travel in seats using normal seat belts.
Position the shoulder belt across the chest
and shoulder, not the face or neck.Abooster
seat may be necessary to achieve proper seat
belt positioning for children over 41 lbs
(18 kg) until they reach a height where alap/
shoulder belt fits properly without a booster
seat.
When the child restraint is notinuse, remove
it from the vehicle or secure it with the seat
belt to prevent the child restraint from
becoming a projectile in the event of an
accident.
If an infant or child is traveling in the vehicle:
X
Secure the infant or child with an
appropriate infant or child restraint
recommended for the child's age and
weight.
X
Make sure that the infant or child is
properly secured at all times while the
vehicle is in motion.
G
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unattended in the
vehicle, even if they are secured in a child
restraint system, or with access to an
unlocked vehicle. Achild's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. The children
could:
R
injure themselves on parts of the vehicle
R
be seriously or fatally injured through
excessive exposure to extreme heat or cold
R
injure themselves or cause an accident with
vehicle equipment that can be operated
even if the SmartKey is removed from the
ignition lock or removed from the vehicle,
such as seat adjustment, steering wheel
adjustment, or the memory function
If children open a door, they could injure other
persons or get out of the vehicle and injure
themselves or be injured by following traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and the child could be burned on these
parts.
G
WARNING
Do not carry heavy or hard objects in the
passenger compartmentortrunk unless they
are firmly secured in place.
Unsecured or improperly positioned cargo
increases a child's risk of injury in the event
of
R
strong braking maneuvers
R
sudden changes of direction
R
an accident
60
Children in the vehicle
Safety
Special seat belt retractor
All seat belts except the driver's seat belt are
equipped with a special seat belt retractor.
When activated, the special seat belt
retractor ensures that the seat belt will not
slacken once the child restraint system has
been secured.
Installing a child restraint system:
X
Always comply with the manufacturer's
installation instructions.
X
Pull the seat belt smoothly from the seat
belt retractor.
X
Engage the seat belt tongue in the belt
buckle.
Activating the special seat belt retractor:
X
Pull the seat belt out fully and let the seat
belt retractor retract it again.
While the seat belt is retracting, you should
hear a ratcheting sound. The special seat
belt retractor is activated.
X
Push down on the child restraint system to
take up any slack.
Removing a child restraint system/
deactivating the special seat belt retractor:
X
Always comply with the manufacturer's
installation instructions.
X
Press the seat belt release button and
guide the belt tongue to the belt outlet.
The special seat belt retractor is
deactivated.
G
WARNING
Never release the seat belt buckle while the
vehicle is in motion, since the special seat belt
retractor will be deactivated.
LATCH-type (ISOFIX) child seat anchors
in the rear
G
WARNING
Children that are too large for a child restraint
must travel in seats using normal seat belts.
Position shoulder belt across the chest and
shoulder, not face or neck.
Abooster seat may be necessary to achieve
proper seat belt positioning for children over
41 lb (18 kg) until they reach a height where
a lap/shoulder belt fits properly without a
booster.
Install the child restraint system in
accordance with the manufacturer's
instructions.
Attach the child restraint system to both
securing rings.
An incorrectly installed child restraint system
could come loose during an accident and
seriously or even fatally injure the child.
Child restraint systems or child seat securing
rings that are malfunctioning or damaged as
the result of a collision must be replaced.
LATCH-type (ISOFIX) is a standardized
securing system for specially designed child
restraint systems on the rear seats. Securing
rings for two LATCH-type (ISOFIX) child
restraint systems are installed on the left and
right of the rear seats.
Secure non-LATCH-type (ISOFIX) child
restraint systems using the vehicle's seat belt
system. When installing child restraint
systems, you must observe the
manufacturer's installation instructions.
!
When installing the child restraint system,
make sure that the seat belt for the middle
seat does not get trapped. The seat belt
could otherwise be damaged.
Vehicles without rear-seat through-loading facility
Installation instructions : indicate the
installation location of securing rings =.
Children in the vehicle
61
Safety
Z
X
Pull protective caps ; from securing rings
= in the direction of the arrow.
Vehicles with rear-seat through-loading facility
X
Install the LATCH-type (ISOFIX) child
restraint system. Comply with the
manufacturer's instructions when
installing the LATCH-type (ISOFIX) child
restraint system.
Top Tether
G
WARNING
Always lock the rear seat backrests in their
upright position when the rear seats are
occupied by passengers. Lock the rear seat
backrests in their upright position before
installing the Top Tether straps or when the
cargo compartment is not in use. Make sure
that rear seat backrestsare secured properly
by pushing and pulling on the seat backrests.
If the seat backrest is not locked properly, the
seat backrest could fold forward. The child
restraint system is no longer supported
properly or held in position and can no longer
fulfill its function. This could cause serious or
even fatal injuries.
Top Tether provides an additional connection
between a child restraint system, secured
with a LATCH-type (ISOFIX) child seat mount,
and the rear seat. This helps reduce the risk
of injury even further.
The Top Tether anchorages are located in the
rear compartment behind the head restraints.
X
Move head restraint : upwards.
X
Fold up cover ; of Top Tether anchorage
=.
X
Route Top Tether belt A under head
restraint : between the two head restraint
bars.
X
Hook Top Tether hook ? into Top Tether
anchorage =.
X
Make sure that Top Tether belt A is not
twisted.
X
Fold downcover ; of Top Tether
anchorage =.
X
Move head restraint : back down again
slightly if necessary (Y page 98). Make
sure that you do not interfere with the
correctrouting of Top Tether belt A.
X
Install the LATCH-type (ISOFIX) child
restraint system with Top Tether. Comply
with the manufacturer's installation
instructions when doing so. Make sure that
Top Tether belt A is tight.
62
Children in the vehicle
Safety
Child-proof locks
Important safety notes
G
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lockthe vehicle.
Do not leave children unattended in the
vehicle, even if they are secured in a child
restraint system, or with access to an
unlocked vehicle. Achild's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. The children
could:
R
injure themselves on parts of the vehicle
R
be seriously or fatally injured through
excessive exposure to extreme heat or cold
R
injure themselves or cause an accident with
vehicle equipment that can be operated
even if the SmartKey is removed from the
ignition lock or removed from the vehicle,
such as seat adjustment, steering wheel
adjustment, or the memory function
If children open a door, they could injure other
persons or get out of the vehicle and injure
themselves or be injured by following traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and the child could be burned on these
parts.
Child-proof locks for the rear doors
G
WARNING
Children could open a rear door from inside
the vehicle. This could result in serious
injuries or an accident. Therefore, when
children ride in the rear always secure the rear
doors with the child-proof locks.
You secure each door individually with the
child-proof locks on the rear doors. Adoor
secured with a child-proof lock cannot be
opened from inside the vehicle. When the
vehicle is unlocked, the door can be opened
from the outside.
X
To activate: press the child-proof lock
lever up in the direction of arrow :.
X
Make sure that the child-proof locks are
working properly.
X
To deactivate: press the child-proof lock
lever down in the direction of arrow ;.
Override feature for the rear side
windows
G
WARNING
When children ride on the vehicle's rear seats,
activate the override switch. Otherwise, the
children could be injured, e.g. by trapping
themselves in the rear side window.
X
To activate/deactivate: press button ;.
If indicator lamp : is lit, operation of the
rear side windows is disabled. Operation is
only possible using the switches in the
driver's door. If indicator lamp : is off,
Children in the vehicle
63
Safety
Z
operation is possible using the switches in
the rear compartment.
Driving safety systems
Overview of driving safety systems
In this section, you will find information about
the following driving safety systems:
R
ABS (Anti-lock Braking System)
R
BAS (Brake Assist System)
R
BAS PLUS (Brake Assist System Plus)
R
ESP
®
(Electronic Stability Program)
R
EBD (Electronic Brake force Distribution)
R
ADAPTIVE BRAKE
R
PRE-SAFE
®
Brake
Important safety notes
If you fail to adapt your driving style or
become distracted, the driving safety
systems can neither reduce the risk of
accident nor override the laws of physics.
Driving safety systems are merely aids
designed to assist driving. You are
responsible for the distance to the vehicle in
front, for vehicle speed and for braking in
good time. Always adapt your driving style to
suit the prevailing road and weather
conditions and maintain asafe distance from
the vehicle in front. Drive carefully.
i
The driving safety systems described only
work as effectively as possible when there
is adequate contact between the tires and
the road surface. Please pay special
attention to the noteson tires,
recommended minimumtire tread depths,
etc. (Y page 310).
In wintry driving conditions, always use
winter tires (M+S tires) and if necessary,
snow chains. Only in this way will the
driving safety systems described in this
section work as effectively as possible.
ABS (Anti-lock Braking System)
Important safety notes
i
Observe the "Importantsafety notes"
section(Ypage 64).
G
WARNING
If ABSis faulty, the wheels could lock when
braking. The steerability and braking
characteristics may be severely impaired.
Additionally, further driving safety systems
are deactivated. There is an increased danger
of skidding and accidents.
Drive on carefully. Have ABS checked
immediately at a qualified specialist
workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp (Y page 244) and
display messages which may be shown in the
instrument cluster (Y page 217).
ABS regulates brake pressure in such a way
that the wheels do not lock when you brake.
This allows you to continue steering the
vehicle when braking.
ABS works from a speed of about 5 mph
(8 km/h) upwards, regardless of road-surface
conditions. ABS works on slippery surfaces,
even if you only brake gently.
The yellow ! ABS warning lamp in the
instrument cluster lights up when the ignition
is switched on. It goes out when the engine is
running.
Braking
X
If ABS intervenes: continue to depress the
brake pedal vigorously until the braking
situation is over.
X
To make a full brake application:
depress the brake pedal with full force.
If ABS intervenes when braking, you will feel
a pulsing in the brake pedal.
The pulsating brake pedal can be an
indication of hazardous road conditions, and
64
Driving safety systems
Safety
functions as a reminder to take extra care
while driving.
BAS (Brake Assist System)
i
Observe the "Important safety notes"
section (Y page 64).
G
WARNING
If BAS is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is a risk of an accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
BAS operates in emergency braking
situations. If you depress the brake pedal
quickly, BAS automatically boosts the braking
force, thus shortening the stopping distance.
X
Keep the brake pedal depressedfirmly until
the emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will function as usual once you
release the brake pedal. BASis deactivated.
BAS PLUS (Brake AssistSystem
PLUS)
i
Observe the "Important safety notes"
section (Y page 64).
BAS PLUS is only available in vehicles
equipped with DISTRONIC PLUS.
For BAS PLUS to assist you when driving, the
radar sensor system must be:
R
activated (Y page 211)
R
operational
With the help of the radar sensor system, BAS
PLUS can detect obstacles that are in the
path of yourvehicle for an extended period of
time.
If the radar sensor system is malfunctioning,
BASPLUS will not be available. The brake
system is still available with complete brake
boosting effect and BAS.
BAS PLUS provides braking assistance in
hazardous situations at speeds greater than
4 mph (7 km/h).
At speeds of up to approximately 40 mph
(70 km/h), BAS PLUS can also detect
stationary objects. Examples of stationary
objects are stopped or parked vehicles.
To prevent a front-end collision, BAS PLUS
calculates the brake force necessary if:
R
you approach an obstacle, and
R
BAS PLUS has detected arisk of collision
At aspeedless than 20 mph(30 km/h): if
you depress the brake pedal, BASPLUS is
activated. Braking is performed as late as
possible.
At a speed greater than 20 mph
(30 km/h):ifyou depress the brake pedal
sharply, BAS PLUS automatically raises the
brake pressure to a value adapted to the
traffic situation.
If BAS PLUS demands particularly high
braking force, preventative passenger
protection measures (PRE-SAFE
®
) are
activated simultaneously.
X
Keep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
BAS PLUS is deactivated and the brakes
function as usual, if:
R
you release the brake pedal.
R
there is no longer any danger of a rear-end
collision.
R
no obstacle is detected in front of your
vehicle.
G
WARNING
BAS PLUS cannot always clearly identify
objects and complex traffic situations. BAS
PLUS cannot intervene in these cases. There
is a risk of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
Driving safety systems
65
Safety
Z
In particular, the detection of obstacles can
be impaired if there is:
R
dirt on the sensors or anything else
covering the sensors
R
snow or heavy rain
R
interference by other radarsources
R
there are strong radar reflections, for
example in parking garages
R
a narrow vehicle traveling in front, e.g. a
motorbike
R
a vehicle traveling in front on a different line
relative to the center of your vehicle
G
WARNING
BAS PLUS does not react:
R
to people or animals
R
to oncoming vehicles
R
to crossing traffic
R
when cornering
As aresult, BAS PLUS may not intervene in all
critical situations. There is a risk of an
accident.
Always pay careful attention to the traffic
situation and be ready to brake.
Following damage to the frontend of the
vehicle, have the configurationand operation
of the radarsensors checked at a qualified
specialist workshop. This also applies to
collisions at low speeds where there is no
visible damage to the frontofthe vehicle.
ESP
®
(Electronic Stability Program)
General notes
i
Observe the "Important safety notes"
section (Y page 64).
ESP
®
monitors driving stability and traction,
i.e. power transmission between the tires and
the road surface.
If ESP
®
detects that the vehicle is deviating
from the direction desired by the driver, one
or more wheels are braked to stabilize the
vehicle. The engine output is also modified to
keep the vehicle on the desired course within
physical limits. ESP
®
assists the driver when
pulling away on wet or slippery roads. ESP
®
can also stabilize the vehicle during braking.
ETS/4ETS (Electronic Traction System)
i
Observe the "Important safety notes"
section (Y page 64).
ETS/4ETS traction control is part of ESP
®
.
Traction control brakes the drive wheels
individually if they spin. This enables you to
pull away and accelerate on slippery surfaces,
for example if the road surface is slippery on
one side. In addition, more drive torque is
transferred to the wheel or wheels with
traction.
Traction control remains active, even if you
deactivate ESP
®
.
Important safety notes
i
Observe the "Important safety notes"
section (Y page 64).
G
WARNING
If ESP
®
is malfunctioning, ESP
®
is unable to
stabilize the vehicle. Additionally, further
driving safety systems are deactivated. This
increases the risk of skidding and an accident.
Drive on carefully. Have ESP
®
checked at a
qualified specialist workshop.
!
When testing the electric parking brake
on a braking dynamometer, switch off the
ignition. Application of the brakes by
ESP
®
may otherwise destroy the brake
system.
Vehicles without 4MATIC: observe the notes
on ESP
®
(Y page 305) when towing the
vehicle with a raised rear axle.
!
Vehicles with 4MATIC: function or
performance tests may only be carried out
on a 2-axle dynamometer. Before you
operate the vehicle on such a
dynamometer, please consult a qualified
66
Driving safety systems
Safety
workshop.You could otherwise damage
the drive train or the brake system.
ESP
®
is deactivated if the å warning lamp
in the instrument cluster lights up
continuously when the engine is running.
If the ÷ warning lamp and the å
warning lamp are lit continuously, ESP
®
is not
available due to a malfunction.
Observe the information on warning lamps
(Y page 246) and display messages which
may be shown in the instrument cluster
(Y page 217).
i
Only use wheels with the recommended
tire sizes. Only then will ESP
®
function
properly.
Characteristics of ESP
General information
ESP
®
is activated automatically when the
engine is started.
If ESP
®
intervenes, the ÷ ESP
®
warning
lamp flashes in the instrument cluster.
If ESP
®
intervenes:
X
Do not deactivate ESP
®
under any
circumstances.
X
Only depress the accelerator pedal as far
as necessary when pulling away.
X
Adapt your driving style to suit the
prevailing road and weather conditions.
Vehicles with the ECO start/stop function
The ECO start/stop function switches the
engine off automatically when the vehicle
stops moving. The engine starts
automatically when the driver wants to pull
away again. ESP
®
remains in its previously
selected status. Example: if ESP
®
was
deactivated before the engine was switched
off, ESP
®
remains deactivated when the
engine is switched on again.
Deactivating/activating ESP
®
(except
AMG vehicles)
Important safety notes
i
Observe the "Important safety notes"
section (Y page 64).
You can select between the following
statuses of ESP:
R
ESP
®
is activated.
R
ESP
®
is deactivated.
G
WARNING
If you deactivate ESP
®
, ESP
®
no longer
stabilizes the vehicle. There is an increased
risk of skidding and an accident.
Only deactivate ESP
®
in the situations
described in the following.
It may be best to deactivate ESP
®
in the
following situations:
R
when using snow chains
R
in deep snow
R
on sand or gravel
i
Activate ESP
®
as soon as the situations
described above no longer apply.ESP
®
will
otherwise not be able to stabilize the
vehicle if the vehicle starts to skid or a
wheel starts to spin.
Deactivating/activating ESP
®
You can activate and deactivate ESP
®
using
the on-board computer.
X
To deactivate:(Y page 207).
The å ESP
®
OFF warning lamp in the
instrument cluster lights up.
X
To activate: (Y page 207).
The å ESP
®
OFF warning lamp in the
instrument cluster goes out.
Characteristics when ESP
®
is deactivated
If ESP
®
is deactivated and one or more wheels
startto spin, the ÷ ESP
®
warning lamp in
the instrument cluster flashes. In such
situations, ESP
®
will not stabilize the vehicle.
Driving safety systems
67
Safety
Z
If you deactivate ESP
®
:
R
ESP
®
no longer improves driving stability.
R
the engine's torque is no longer limited and
the drive wheels are able to spin. The
spinning of the wheels results in a cutting
action, which provides better grip.
R
traction control is still activated.
R
ESP
®
still provides support when you
brake.
Deactivating/activating ESP
®
(AMG
vehicles)
Important safety notes
You can select betweenthe following
statuses of ESP:
R
ESP
®
is activated.
R
SPORT handling mode is activated.
R
ESP
®
is deactivated.
G
WARNING
When SPORT handling mode is activated,
there is a greater risk of skidding and
accidents.
Only activate SPORT handling mode in the
situations described in the following.
G
WARNING
If you deactivate ESP
®
, ESP
®
no longer
stabilizes the vehicle. There is an increased
risk of skidding and an accident.
Only deactivate ESP
®
in the situations
described in the following.
In the following situations, it may be better to
activate SPORT handling mode or deactivate
ESP
®
:
R
when using snow chains
R
in deep snow
R
on sand or gravel
R
on designated roads when the vehicle's
own oversteering and understeering
characteristics are desired
Driving in SPORT handling mode or without
ESP
®
requires an extremely qualified and
experienced driver.
i
Activate ESP
®
as soon as the situations
described above no longer apply.ESP
®
will
otherwise not be able to stabilize the
vehicle if the vehicle starts to skid or a
wheel starts to spin.
Deactivating/activating ESP
®
X
To activate SPORT handling mode:
briefly press button :.
The M SPORT handling mode warning
lamp in the instrument cluster lights up.
The
SPORT handling mode
message
appears in the multifunction display.
X
To deactivate SPORT handling mode:
briefly press button :.
The M SPORT handling mode warning
lamp in the instrument cluster goes out.
X
To deactivate ESP
®
: press button : until
the å ESP
®
OFF warning lamp lights up
in the instrument cluster.
The ÷
OFF message appears in the
multifunction display.
X
To activate ESP
®
: briefly press button :.
The å ESP
®
OFF warning lamp in the
instrument cluster goes out. The ÷
ESP
®
ON
message appears in the
multifunction display.
68
Driving safety systems
Safety
Characteristics of activated SPORT
handling mode
If SPORT handling mode is activated and one
or more wheels start to spin, the ÷ ESP
®
warning lamp in the instrument cluster
flashes. ESP
®
only stabilizes the vehicle to a
limited degree.
When SPORT handling mode is activated:
R
ESP
®
only improves driving stability to a
limited degree.
R
traction control is still activated.
R
the engine's torque is restricted to a limited
degree and the drive wheels can spin in a
controlled manner. The spinning of the
wheels results in a cuttingaction, which
provides bettergrip.
R
ESP
®
still provides support when you
brake.
Characteristics when ESP
®
is deactivated
If ESP
®
is deactivated and one or more wheels
start to spin, the ÷ ESP
®
warning lamp in
the instrument cluster does not flash. In such
situations, ESP
®
will not stabilize the vehicle.
If you deactivate ESP
®
:
R
ESP
®
no longer improves driving stability.
R
the engine's torque is no longer limited and
the drive wheels are able to spin without
restriction. The spinning of the wheels
results in a cutting action, which provides
better grip.
R
traction control is still activated.
R
PRE-SAFE
®
is no longer available; nor is it
activated if you brake with assistance from
ESP
®
.
R
PRE-SAFE
®
Brake is no longer available;
nor is it activated if you brake with
assistance from ESP
®
.
R
ESP
®
still provides support when you
brake.
EBD (electronic brake force
distribution)
i
Observe the "Important safety notes"
section (Y page 64).
G
WARNING
If EBD has malfunctioned, the rear wheels can
still lock, e.g. under full braking. This
increases the risk of skidding and an accident.
You should therefore adapt yourdriving style
to the different handling characteristics. Have
the brake system checked at a qualified
specialist workshop.
Observe informationregarding indicator and
warning lamps (Y page 244) as well as
display messages (Y page 218).
EBD monitors and controls the brake
pressure on the rear wheels to improve
driving stability while braking.
ADAPTIVE BRAKE
ADAPTIVE BRAKE enhances braking safety
and offers increased braking comfort. In
addition to the braking function, ADAPTIVE
BRAKE also has the HOLD function
(Y page 176) and hill start assist
(Y page 144). For further information, see
"Driving tips" (Y page 162).
PRE-SAFE
®
Brake
i
Observe the "Important safety notes"
section (Y page 64).
PRE-SAFE
®
Brake is only available in vehicles
with DISTRONIC PLUS.
If PRE-SAFE
®
Brake is to aid you, the radar
sensor system must be:
R
activated (Y page 211)
R
operational
With the help of the radar sensor system,
PRE-SAFE
®
Brake can detect obstacles that
are in front of your vehicle for an extended
period of time.
Driving safetysystems
69
Safety
Z
PRE-SAFE
®
Brake can help you to minimize
the risk of a collision with a vehicle ahead or
reduce the effects of such a collision. If PRE-
SAFE
®
Brake has detected a risk of collision,
you will be warned visually and acoustically
as well as by automatic braking. PRE-SAFE
®
Brake cannot prevent a collision without your
intervention.
Starting at a speed of around
4 mph (7 km/h), this function warns you if
you very quickly approach a vehicle in front.
An intermittent warning tone will then sound
and the · distance warning lamp will light
up in the instrument cluster.
X
Brake immediately in order to increase the
distance from the vehicle in front.
or
X
Take evasive action provided it is safe to do
so.
From a speed of approximately
4 mph (7 km/h), if the driver and front
passenger have fastened their seat belts,
PRE-SAFE
®
Brake can brake the vehicle
automatically at speeds up to approximately
124 mph (200 km/h).
Due to the nature of the system, particularly
complicated driving conditions may cause
unnecessary warnings or the unnecessary
intervention of PRE-SAFE
®
Brake.
You can prevent the intervention of the PRE-
SAFE
®
Brake at any time by:
R
depressing the accelerator pedal further
R
activating kickdown
R
releasing the brake pedal
The braking action of PRE-SAFE
®
Brake is
ended automatically if:
R
you maneuver to avoid the obstacle.
R
there is no longer any danger of a rear-end
collision.
R
there is no longer an obstacle detected in
front of your vehicle.
At speeds of up to approximately 40 mph
(70 km/h), PRE-SAFE
®
Brake can also detect
stationary objects. Examples of stationary
objects are stopped or parked vehicles.
If you approach an obstacle and PRE-SAFE
®
Brake detects a risk of a collision, the system
will alert you both visually and acoustically. If
you do not brake or take evasive action, the
system will warn you by automatically braking
the vehicle gently. If there is an increased risk
of collision, preventative passenger
protection measures (PRE-SAFE
®
) are
activated (Y page 52). If the risk of collision
with the vehicle in frontremains and you do
not brake, take evasive action or accelerate
significantly, automatic braking may be
performed up to a level of emergency braking.
Automatic emergency braking is not
performed until immediately prior to an
accidentthat can no longer be avoided.
G
WARNING
PRE-SAFE
®
Brake will initially brake your
vehicle by a partial application of the brakes
if a danger of collision is detected. There may
be a collision unless you also brake.
Automatic emergency braking cannot prevent
a collision. There is a risk of an accident.
Always apply the brakes yourself and try to
take evasive action.
G
WARNING
PRE-SAFE
®
Brake cannot always clearly
identify objects and complex traffic
conditions.
In these cases, PRE-SAFE
®
Brake may:
R
give an unnecessary warning and then
brake the vehicle
R
not give a warning or intervene
There is a risk of an accident.
Always pay particular attention to the traffic
situation and be ready to brake, especially if
PRE-SAFE
®
Brake warns you. Terminate the
intervention in a non-critical driving situation.
70
Driving safety systems
Safety
In particular, the detection of obstacles can
be impaired if:
R
dirt on the sensors or anything else
covering the sensors
R
snow or heavy rain
R
interference by other radarsources
R
there are strong radar reflections, for
example in parking garages
R
a narrow vehicle traveling in front, e.g. a
motorbike
R
a vehicle traveling in front on a different line
relative to the center of your vehicle
G
WARNING
PRE-SAFE
®
Brake does not react:
R
to people or animals
R
to oncoming vehicles
R
to crossing traffic
R
when cornering
As a result, PRE-SAFE
®
Brake may neither
give warnings nor intervene in all critical
situations. There is a risk of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
In order to maintain an appropriate distance
from the vehicle in front and thus prevent a
collision, you must apply the brakes yourself.
X
To activate/deactivate: activate or
deactivate PRE-SAFE
®
Brake in the on-
board computer (Y page 207).
When PRE-SAFE
®
Brake is activated, the
Ä symbol appears in the multifunction
display as long as the HOLD function is
deactivated (Y page 176).
On vehicles with Parking Guidance, the
Ä symbol is displayed when position P
is engaged or you are driving faster than
22 mph (35 km/h).
Following damage to the front end of the
vehicle, have the configuration and operation
of the radar sensors checked at a qualified
specialist workshop. This also applies to
collisions at low speeds where there is no
visible damage to the front of the vehicle.
Theft deterrent locking system
Immobilizer
The immobilizer prevents your vehicle from
being started without the correct SmartKey.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. The
engine can be started by anyone with a valid
SmartKey that is left inside the vehicle.
X
To activate with the SmartKey: remove
the SmartKey from the ignition lock.
X
To activate with KEYLESS-GO: switch the
ignition off and open the driver's door.
X
To deactivate: switch on the ignition.
i
The immobilizer is always deactivated
when you start the engine.
In the event that the engine cannot be
started when the starter battery is fully
charged, the immobilizer may be faulty.
Contact an authorized Mercedes-Benz
Center or call 1-800-FOR-MERCedes (in the
USA) or 1-800-387-0100 (in Canada).
ATA (anti-theft alarm system)
Avisual and audible alarm is triggered if the
alarm system is armed and you open:
R
a door
R
the vehicle with the mechanical key
R
the trunk lid
R
the hood
The alarm is not switched off, even if you
close the open door that triggered it, for
example.
Theft deterrent locking system
71
Safety
Z
i If the alarm stays on for more than
30 seconds, the mbrace emergency call
system (USA only) or the Tele Aid system
(Canada only) initiates a call to the
Customer Assistance Center
automatically. The Tele Aid system will
initiate the call provided that:
R
you have subscribed to the Tele Aid
service.
R
the Tele Aid service has been activated
properly.
R
the required mobile phone, powersupply
and GPS are available.
X
To arm: lockthe vehicle with the SmartKey
or KEYLESS-GO.
Indicator lamp : flashes. The alarm
system is armed after approximately
15 seconds.
X
To disarm: unlock the vehicle with the
SmartKey or KEYLESS-GO.
X
To stop the alarm using the SmartKey:
insert the SmartKey into the ignition lock.
The alarm is switched off.
or
X
Press the % or & button on the
SmartKey.
The alarm is switched off.
X
To stop the alarm using KEYLESS-GO:
grasp the outside door handle. The
SmartKey must be outside the vehicle.
The alarm is switched off.
or
X
Press the Start/Stop button on the
dashboard. The SmartKey must be inside
the vehicle.
The alarm is switched off.
72
Theft deterrent locking system
Safety

Related Topics

Useful information Panic alarm Occupant safety Children in the vehicle Driving safety systems Theft deterrent locking system

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