2014-2021 Mercedes C Class 4 Door Occupant safety User Manual
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Occupant safety for Your Mercedes C Class 4 Door Fourth Generation (2014-2021)

Occupant safety 35  
Reduced restraint system protection  
In order for the restraint system to provide the  
intended level of protection, each vehicle occu‐  
pant must observe the following information:  
Restraint system  
Protection provided by the restraint system  
&
WARNING Risk of injury or death due to  
modifications to the restraint system  
The restraint system includes the following com‐  
ponents:  
R
Fasten seat belts correctly.  
Vehicle occupants may no longer be protec‐  
ted as intended if alterations are made to the  
restraint system.  
R
Sit in an almost upright seat position with  
their back against the seat backrest.  
R
Seat belt system  
R
Airbags  
R
Sit with their feet resting on the floor, if pos‐  
sible.  
#
Never alter the parts of the restraint  
system.  
R
Child restraint system  
R
Always secure persons under 1.50 m tall in  
R
Child seat securing systems  
#
Never tamper with the wiring or any  
an additional restraint system suitable for  
Mercedes-Benz vehicles.  
The restraint system can help prevent the vehi‐  
cle occupants from coming into contact with  
parts of the vehicle interior in the event of an  
accident. In the event of an accident, the  
restraint system can also reduce the forces to  
which the vehicle occupants are subjected.  
A seat belt can only provide the best level of pro‐  
tection if it is worn correctly. Depending on the  
detected accident situation, seat belt tensioners  
and/or airbags supplement the protection  
offered by a correctly worn seat belt. Seat belt  
tensioners and/or airbags are not deployed in  
every accident.  
electronic component parts or their  
software.  
However, no system available today can com‐  
pletely eliminate injuries and fatalities in every  
accident situation. In particular, the seat belt  
and airbag generally do not protect against  
objects penetrating the vehicle from the outside.  
It is also not possible to completely rule out the  
risk of injury caused by the airbag deploying.  
If it is necessary to modify the vehicle to accom‐  
modate a person with disabilities, contact a  
qualified specialist workshop.  
Mercedes-Benz recommends that you use driv‐  
ing aids which have been approved for your vehi‐  
cle by Mercedes-Benz.  
Restraint system functionality  
When the ignition is switched on, a self-test is  
performed, during which the 6 restraint sys‐  
36 Occupant safety  
Function of the restraint system in an acci‐  
dent  
tem warning lamp lights up. It goes out no later  
than a few seconds after the vehicle is started.  
The components of the restraint system are then  
functional.  
only parts which are relatively easily deformed  
are affected and the rate of vehicle deceleration  
is not high. Conversely, an airbag may be  
deployed even though the vehicle suffers only  
minor deformation. If very rigid vehicle parts  
such as longitudinal members are hit, this may  
result in sufficiently high levels of vehicle decel‐  
eration.  
Depending on the detected deployment situa‐  
tion, the components of the restraint system can  
be activated or deployed independently of each  
other:  
How the restraint system works is determined by  
the severity of the impact detected and the type  
of accident anticipated:  
Malfunctioning restraint system  
R
Frontal impact  
A malfunction has occurred in the restraint sys‐  
tem if:  
R
Rear impact  
R
Side impact  
R
the 6 restraint system warning lamp does  
not light up when the ignition is switched on  
R
Only for certain countries: rollover  
The activation thresholds for the components of  
the restraint system are determined based on  
the evaluation of the sensor values measured at  
various points in the vehicle. This process is pre-  
emptive in nature. The triggering/deployment of  
the components of the restraint system must  
take place in good time at the start of the colli‐  
sion.  
Factors which can only be seen and measured  
after a collision has occurred do not play a deci‐  
sive role in the deployment of an airbag. Nor do  
they provide an indication of airbag deployment.  
R
the 6 restraint system warning lamp  
R
Front seat belt tensioner: frontal impact, rear  
lights up continuously or repeatedly during a  
journey  
impact, side impact, rollover1  
R
Rear seat belt tensioner: frontal impact, rear  
&
WARNING Risk of injury due to malfunc‐  
tions in the restraint system  
impact, rollover1  
R
Driver's airbag, front passenger airbag: fron‐  
tal impact  
Components in the restraint system may be  
activated unintentionally or not deploy as  
intended in an accident.  
R
Knee airbag: frontal impact  
R
Side airbag: side impact  
#
Have the restraint system checked and  
Window airbag: side impact, rollover1, frontal  
impact  
R
repaired immediately at a qualified spe‐  
cialist workshop.  
The vehicle may be deformed significantly with‐  
out an airbag being deployed. This is the case if  
1) Only for certain countries.  
Occupant safety 37  
The front passenger airbag can only be deployed If the seat belt tensioners are triggered or an air‐  
&
WARNING Risk of injury or death due to  
incorrectly fastened seat belt  
in an accident if the PASSENGER AIR BAG OFF  
indicator lamp is off. If the front passenger seat  
is occupied, make sure, both before and during  
the journey, that the status of the front  
bag is deployed, you will hear a bang, and a  
small amount of powder may also be released:  
If the seat belt is not worn correctly, it can‐  
not perform its intended protective function.  
In addition, an incorrectly fastened seat belt  
can also cause injuries, for example, in the  
event of an accident or when braking or  
changing direction suddenly.  
R
The bang will not generally affect your hear‐  
ing.  
passenger airbag is correct (/ page 46).  
R
In general, the powder released is not haz‐  
ardous to health but may cause short-term  
breathing difficulties to persons suffering  
from asthma or other pulmonary conditions.  
Provided it is safe to do so, leave the vehicle  
immediately or open the window in order to  
prevent breathing difficulties.  
&
WARNING Risk of burns from hot airbag  
components  
#
The airbag parts are hot after an airbag has  
been deployed.  
Always ensure that all vehicle occu‐  
pants have their seat belts fastened  
correctly and are sitting properly.  
#
Do not touch the airbag parts.  
#
Have a deployed airbag replaced at a  
qualified specialist workshop as soon  
as possible.  
Always observe the instructions about the cor‐  
rect driver's seat position and adjusting the seat  
(/ page 95).  
In order for the correctly worn seat belt to pro‐  
vide the intended level of protection, each vehi‐  
cle occupant must observe the following infor‐  
mation:  
Seat belts  
Protection provided by the seat belt  
Mercedes-Benz recommends that you have the  
vehicle towed to a qualified specialist workshop  
after an accident. Take this into account, partic‐  
ularly if a seat belt tensioner is triggered or an  
airbag deployed.  
Always fasten your seat belt correctly before  
starting a journey. A seat belt can only provide  
the best level of protection if it is worn correctly.  
R
The seat belt must not be twisted and must  
fit tightly and snugly across the body.  
38 Occupant safety  
R
The seat belt must be routed across the  
centre of the shoulder and as low down  
across the hips as possible.  
The shoulder section of the seat belt should  
not touch your neck nor be routed under  
your arm or behind your back.  
Avoid wearing bulky clothing, e.g. a winter  
coat.  
Push the lap belt down as far as possible  
securing objects, luggage or loads  
the shoulder belt is routed across the  
centre of your shoulder.  
(/ page 107).  
Also ensure that no objects, e.g. a cushion,  
are ever placed between a person and the  
seat.  
R
&
WARNING Risk of injury or death when  
additional restraint systems are not used  
for persons with a smaller stature  
If children are travelling in the vehicle, be sure to  
observe the instructions and safety notes on  
"Children in the vehicle" (/ page 51).  
R
Persons under 1.50 m tall cannot wear the  
seat belt correctly without a suitable addi‐  
tional restraint system.  
R
across your hips and pull tight with the shoul‐  
der section of the belt. Never route the lap  
belt across your abdomen.  
Limitations of the protection provided by the  
seat belt  
#
Always secure persons under 1.50 m  
tall in a suitable restraint system.  
Pregnant women must also take particular  
care with this.  
Never route the seat belt across sharp, poin‐  
ted, abrasive or fragile objects.  
&
WARNING Risk of injury or death due to  
an incorrect seat position  
&
WARNING Risk of injury or death due to  
damaged or modified seat belts  
R
The seat belt does not offer the intended  
level of protection if you have not moved the  
seat backrest to an almost vertical position.  
You could slip beneath the seat belt and  
injure yourself.  
Seat belts cannot provide protection in the  
following situations:  
R
Only one person should use each seat belt at  
R
the seat belt is damaged, has been modi‐  
fied, is extremely dirty, bleached or dyed  
the seat belt buckle is damaged or  
extremely dirty  
any one time. Never allow babies and chil‐  
dren to travel sitting on the lap of another  
vehicle occupant.  
R
#
Adjust the seat properly before com‐  
mencing your journey.  
Always ensure that the seat backrest is  
in an almost vertical position and that  
R
Never secure objects with a seat belt if the  
seat belt is also being used by one of the  
vehicle's occupants. Always observe the  
instructions for loading the vehicle when  
#
Occupant safety 39  
Releasing the rear centre seat belt  
R
modifications have been made to the seat  
belt tensioner, seat belt anchorage or  
seat belt retractor  
&
WARNING Risk of injury or death from  
deployed pyrotechnic seat belt tension‐  
ers  
If the left-hand rear seat backrest is folded down  
and back up again, it may not be possible to pull  
out the rear centre seat belt. The seat belt must  
be released.  
Pyrotechnic seat belt tensioners that have  
been deployed are no longer operational and  
are unable to perform their intended protec‐  
tive function.  
Seat belts may sustain non-visible damage in  
an accident, e.g. due to glass splinters.  
Modified or damaged seat belts could tear or  
fail in the event of an accident, for example.  
Modified seat belt tensioners could acciden‐  
tally trigger or fail to function as intended.  
#
Pull the seat belt out approximately 25 mm  
at the seat belt outlet on the seat backrest  
and then release it again.  
#
Therefore, have deployed pyrotechnic  
The seat belt is retracted and released.  
seat belt tensioners immediately  
replaced at a qualified specialist work‐  
shop.  
#
Never modify the seat belt system, for  
Fastening and adjusting seat belts  
example the seat belt, seat belt buckle,  
seat belt tensioner, seat belt anchorage  
and seat belt retractor.  
If the seat belt is pulled quickly or sharply, the  
seat belt retractor locks. The seat belt strap can‐  
not be pulled out any further.  
Mercedes-Benz recommends that you have the  
vehicle towed to a qualified specialist workshop  
after an accident.  
#
Make sure that the seat belts are  
undamaged, not worn and clean.  
NOTE Damage caused by trapping the  
seat belt  
*
#
Always have the seat belts checked  
immediately after an accident at a  
qualified specialist workshop.  
If an unused seat belt is not fully retracted, it  
may become trapped in the door or in the  
seat mechanism.  
Mercedes-Benz recommends that you use seat  
belts which have been approved for your vehicle  
by Mercedes-Benz.  
#
Always ensure that an unused seat belt  
is fully retracted.  
40 Occupant safety  
Vehicles with automatic front passenger air‐  
bag shutoff:  
also deploy in the event of an accident along  
with other systems.  
#
Only one person should use each seat  
belt at any one time.  
NOTE Deployment of the seat belt ten‐  
sioner and side impact airbag when the  
front passenger seat is unoccupied  
*
Seat belt adjustment function  
If the seat belt tongue is engaged in the seat  
belt buckle of the unoccupied front  
passenger seat, the seat belt tensioner and  
the side impact airbag may also deploy in the  
event of an accident along with other sys‐  
tems.  
Vehicles with PRE-SAFE®: if the front seat belt  
is not pulled tightly across your body, the seat  
belt adjustment may automatically apply a cer‐  
tain tightening force. Do not hold the seat belt  
tightly while it is adjusting.  
You can activate and deactivate the seat belt  
adjustment function using the multimedia sys‐  
tem (/ page 41).  
#
Only one person should use each seat  
belt at any one time.  
Vehicles without automatic front passenger  
airbag shutoff:  
#
Always engage seat belt tongue 2 of the  
seat belt into seat belt buckle 1 of the cor‐  
Releasing a seat belt  
responding seat.  
NOTE Deployment of the seat belt ten‐  
sioner when the front passenger seat is  
unoccupied  
*
#
#
Press and hold the seat belt outlet release  
Press the release button in the seat belt  
and slide seat belt outlet 3 into the desired  
buckle and guide the seat belt back with the  
seat belt tongue.  
position.  
If the seat belt tongue is engaged in the seat  
belt buckle of the unoccupied front  
passenger seat, the seat belt tensioner may  
#
Let go of the seat belt outlet release and  
ensure that seat belt outlet 3 locks into  
position.  
Occupant safety 41  
Activating/deactivating seat belt adjustment  
via the multimedia system  
Airbags  
Overview of airbags  
Multimedia system:  
4
5
Vehicle  
î Vehicle settings  
5
Belt adjustment  
#
Activate O or deactivate ª the function.  
Seat belt warning function for the driver and  
front passenger  
When the ignition is switched on, the rear seat  
belt status display informs you for a certain  
amount of time which rear seat belt is not fas‐  
tened.  
The ü seat belt warning lamp in the instru‐  
ment display is a reminder that all vehicle occu‐  
pants must wear their seat belts correctly.  
1
2
3
4
5
Knee airbag  
In addition, a warning tone may sound.  
As soon as the driver and front passenger fasten  
their seat belts, the seat belt warning goes out.  
You can immediately dismiss the rear seat belt  
status display using the back button on the left-  
hand side of the steering wheel (/ page 245).  
If a vehicle occupant unfastens a seat belt in the  
rear while the vehicle is motion, the rear seat  
belt status display appears again.  
In addition, a warning tone may sound. In this  
case, the rear seat belt status display cannot be  
hidden using the back button on the left-hand  
side of the steering wheel.  
Driver's airbag  
Front passenger airbag  
Window airbag  
Side airbag  
Function of the rear seat belt status display  
The installation location of an airbag is identified  
by the AIRBAG symbol.  
When enabled, an airbag can provide additional  
protection for the respective vehicle occupant.  
The rear seat belt status display is only available  
for certain countries.  
42 Occupant safety  
Potential protection provided by each airbag:  
FRONT AIRBAG in front of it, this can result in  
DEATH or SERIOUS INJURY to the child.  
NOTE Important points to remember if  
the front passenger seat is unoccupied  
*
R
Knee airbag: thigh, knee and lower leg  
R
Driver's airbag, front passenger airbag: head  
In an accident, the components of the  
restraint system may deploy unnecessarily  
on the front passenger side if:  
When fitting a child restraint system to the front  
passenger seat, observe the vehicle-specific  
information (/ page 65). Also, always observe  
the notes on rearward-facing or forward-facing  
child restraint systems on the front passenger  
seat.  
and ribcage  
R
Window airbag: head  
Side airbag: ribcage, also pelvis for front seat  
occupants  
R
R
There are heavy objects on the front  
passenger seat.  
R
The seat belt tongue is engaged in the  
seat belt buckle of the front passenger  
seat and the front passenger seat is  
unoccupied.  
NOTE Mercedes-AMG vehicles  
*
Information on automatic front passenger  
airbag shutoff  
#
Observe the notes in the Supplement.  
You could otherwise fail to recognise  
dangers.  
The front passenger airbag can only be deployed  
in an accident if the PASSENGER AIR BAG OFF  
indicator lamp is off. If the front passenger seat  
is occupied, make sure, both before and during  
the journey, that the status of the front  
passenger airbag is correct (/ page 46).  
#
#
Stow objects in a suitable place.  
Only one person should use each seat  
belt at any one time.  
&
WARNING Risk of injury or fatal injuries  
if the front passenger airbag is enabled  
Depending on the detected accident situation,  
the window airbag on the front passenger side  
may deploy. The airbag is deployed regardless of  
whether the front passenger seat is occupied.  
If the front passenger airbag is enabled, a  
child on the front passenger seat may be  
struck by the front passenger airbag during  
an accident.  
NEVER use a rearward facing child restraint  
system on a seat protected by an ENABLED  
Occupant safety 43  
Protection provided by the airbags  
R
To avoid the risks resulting from the deployment  
of an airbag, each vehicle occupant must  
Always stow and secure objects correctly.  
Depending on the accident situation, an airbag  
may supplement the protection provided by a  
correctly fastened seat belt.  
Objects in the vehicle interior may prevent an  
airbag from functioning correctly. Each vehicle  
occupant must always make sure of the follow‐  
ing in particular:  
observe the following information in particular:  
R
Before starting your journey, adjust your seat  
correctly; the driver's seat and front  
passenger seat should be moved as far back  
as possible.  
&
WARNING Risk of injury or death due to  
an incorrect seat position  
R
There are no people, animals or objects  
between the vehicle occupants and an air‐  
bag.  
There are no objects between the seat, door  
and door pillar (B-pillar).  
There are no hard objects, e.g. coat hangers,  
hanging on the grab handles or coat hooks.  
There are no accessory parts, such as mobile  
navigation devices, mobile phones or cup  
holders, attached to the vehicle within the  
deployment area of an airbag, e.g. on the  
cockpit, on the door, on the side window or  
on the side wall trim.  
In addition, no connecting cables, tensioning  
straps or retaining straps must be routed or  
attached to the vehicle within the deploy‐  
ment area of an airbag. Always comply with  
the accessory manufacturer's installation  
When doing so, always observe the informa‐  
tion on the correct driver's seat position  
(/ page 95).  
If you deviate from the correct seat position,  
the airbag cannot perform its intended pro‐  
tective function.  
Each vehicle occupant must make sure of the  
following:  
R
R
Only hold the steering wheel by the steering  
R
wheel rim. This allows the airbag to be fully  
deployed.  
R
Fasten seat belts correctly. Pregnant  
R
R
Always lean against the seat backrest when  
women must take particular care to  
ensure that the lap belt never lies across  
the abdomen.  
the vehicle is in motion. Do not lean forwards  
or against the door or side window. You may  
otherwise be in the deployment area of the  
airbags.  
R
Adopt the correct seat position and keep  
as far away as possible from the airbags.  
R
Always keep your feet on the floor. Do not  
R
Observe the following information.  
put your feet on the cockpit, for example.  
Your feet may otherwise be in the deploy‐  
ment area of the airbag.  
#
Always make sure that there are no  
objects between the airbag and vehicle  
occupant.  
R
If children are travelling in the vehicle,  
observe the additional notes (/ page 51).  
44 Occupant safety  
instructions and, in particular, the notes on  
suitable places for installation.  
There are no heavy, sharp-edged or fragile  
objects in the pockets of your clothing. Store  
such objects in a suitable place.  
#
Always have work on the doors or door  
trim carried out at a qualified specialist  
workshop.  
&
WARNING Risk of injury or death due to  
the use of unsuitable seat covers  
R
Due to unsuitable seat covers, the airbags  
cannot protect vehicle occupants as inten‐  
ded.  
In addition, the operation of the automatic  
front passenger airbag shutoff could be  
restricted.  
&
WARNING Risk of injury due to deployed  
airbag  
Limited protection provided by airbags  
A deployed airbag no longer offers any pro‐  
tection.  
&
WARNING Risk of injury due to modifi‐  
cations to the cover of an airbag  
#
#
Have the vehicle towed to a qualified  
specialist workshop in order to have the  
deployed airbag replaced.  
You should only use seat covers that  
have been approved for the correspond‐  
ing seats by Mercedes-Benz.  
If you modify the cover of an airbag or affix  
objects such as stickers to it, the airbag may  
no longer function correctly.  
Have deployed airbags replaced immediately.  
&
WARNING Risk of injury due to malfunc‐  
tioning sensors in the door  
#
Never modify the cover of an airbag and  
do not affix objects to it.  
Status of the front passenger front airbag  
The function of the airbags can be impaired  
due to modifications or incorrect work per‐  
formed on the doors or door trim, or if the  
doors are damaged.  
Function of the automatic front passenger  
airbag shutoff  
The automatic front passenger front airbag shut‐  
off is able to detect whether the front passenger  
seat is occupied by a person or a child restraint  
system. The front passenger airbag is enabled or  
disabled accordingly.  
The installation location of an airbag is identified  
by the AIRBAG symbol (/ page 41).  
#
Never modify the doors or parts of the  
doors.  
Occupant safety 45  
When fitting a child restraint system to the front  
passenger seat, always make sure of the follow‐  
ing:  
A person on the front passenger seat must  
&
WARNING Risk of injury or death due to  
objects between the seat surface and  
the child restraint system  
observe the following information:  
R
Fasten seat belts correctly (/ page 37).  
R
Ensure that the child restraint system is posi‐  
tioned correctly (/ page 55).  
R
Sit in an almost upright seat position with  
their back against the seat backrest.  
Objects between the sitting surface and the  
child restraint system could affect the func‐  
tion of the automatic front passenger airbag  
shutoff.  
R
Always comply with the child restraint sys‐  
tem manufacturer's installation instructions.  
R
Sit with their feet resting on the floor, if pos‐  
sible.  
R
Never place objects (e.g. cushions) under or  
behind the child restraint system.  
#
Do not place any objects between the  
sitting surface and the child restraint  
system.  
The entire base of the child restraint  
system must always rest on the sitting  
surface of the front passenger seat.  
The front passenger airbag may otherwise be  
disabled by mistake, for example, in the follow‐  
ing situations:  
R
R
Fully retract the seat cushion length adjust‐  
ment.  
The entire base of the child restraint system  
must always rest on the sitting surface of the  
front passenger seat.  
#
R
The front passenger transfers their weight by  
supporting themselves on a vehicle armrest.  
R
The front passenger sits in such a way that  
#
The backrest of the forward-facing child  
their weight is raised from the sitting sur‐  
face.  
R
R
restraint system must, as far as possi‐  
ble, be resting on the seat backrest of  
the front passenger seat.  
The backrest of the forward-facing child  
restraint system must, as far as possible, be  
resting on the seat backrest of the front  
passenger seat.  
The child restraint system must not touch the  
roof or be put under strain by the head  
restraints. Adjust the seat backrest inclina‐  
tion and the head restraint setting accord‐  
ingly.  
&
WARNING Risk of injury or death due to  
a disabled front passenger airbag  
#
Always comply with the child restraint  
system manufacturer's installation  
instructions.  
The front passenger airbag is disabled when  
the PASSENGER AIR BAG OFF indicator lamp  
is lit.  
46 Occupant safety  
Always observe the notes on the function of the  
PASSENGER AIR BAG indicator lamps  
(/ page 46).  
side of the cockpit on the front passenger side  
A person in the front passenger seat could  
then, for example, come into contact with  
the vehicle interior, especially if the person is  
sitting too close to the cockpit.  
If the front passenger seat is occupied,  
always ensure that:  
(/ page 65).  
Self-test of automatic front passenger airbag  
shutoff  
When the ignition is switched on, a self-test is  
performed during which the two PASSENGER  
AIR BAG ON and OFF indicator lamps light up  
simultaneously.  
The status of the front passenger airbag is dis‐  
played via the PASSENGER AIR BAG indicator  
lamps after the self-test:  
Function of the PASSENGER AIR BAG indica‐  
tor lamps  
R
the classification of the person in the  
front passenger seat is correct and the  
front passenger airbag is enabled or disa‐  
bled in accordance with the person in the  
front passenger seat.  
R
R
the front passenger seat has been moved  
as far back as possible.  
ON is lit: the front passenger airbag may  
deploy during an accident.  
R
the person is seated correctly.  
The indicator lamp goes out after approx‐  
imately 60 seconds.  
ON and OFF are not lit: the front passenger  
airbag may deploy during an accident.  
OFF is lit: the front passenger airbag is disa‐  
#
Both before and during the journey,  
ensure that the status of the front  
passenger airbag is correct.  
R
R
If the front passenger seat is occupied, the clas‐  
sification of the person or child restraint system  
on the front passenger seat takes place after the  
front passenger airbag shutoff self-test. The  
PASSENGER AIR BAG indicator lamps display the  
status of the front passenger airbag.  
bled. It will then not be deployed in the event  
of an accident.  
Vehicles without automatic front passenger air‐  
bag shutoff have a special sticker affixed to the  
If the PASSENGER AIR BAG ON indicator lamp is  
off, only the PASSENGER AIR BAG OFF indicator  
lamp shows the status of the front passenger  
Occupant safety 47  
airbag. The PASSENGER AIR BAG OFF indicator  
lamp may be lit continuously or be off.  
not fit the rearward-facing child restraint system  
to the front passenger seat.  
Instead, fit the rearward-facing child restraint  
system to a suitable rear seat.  
After fitting a forward-facing child restraint  
system to the front passenger seat: depend‐  
ing on the child restraint system and the stature  
of the child, PASSENGER AIR BAG OFF may be lit  
continuously or be off. Always observe the fol‐  
lowing information.  
&
WARNING Risk of injury or death when  
using a rearward-facing child restraint  
system while the front passenger airbag  
is enabled  
If the PASSENGER AIR BAG OFF indicator lamp  
and the 6 restraint system warning lamp  
light up simultaneously, the front passenger seat  
may not be used. Also in this case, do not fit a  
child restraint system to the front passenger  
seat. Have the automatic front passenger airbag  
shutoff checked and repaired immediately at a  
qualified specialist workshop.  
If you secure a child in a rearward-facing  
child restraint system on the front passenger  
seat and the PASSENGER AIR BAG OFF indi‐  
cator lamp is off, the front passenger airbag  
can deploy in the event of an accident.  
The child could be struck by the airbag.  
Status display  
Always ensure that the front passenger air‐  
bag is disabled. The PASSENGER AIR BAG  
OFF indicator lamp must be lit.  
NEVER use a rearward-facing child restraint  
system on a seat with an ENABLED FRONT  
AIRBAG; DEATH or SERIOUS INJURY to the  
CHILD can occur.  
&
WARNING Risk of injury or death due to  
incorrect positioning of the forward-  
facing child restraint system  
If the front passenger seat is occupied, ensure,  
both before and during the journey, that the sta‐  
tus of the front passenger airbag is correct for  
the current situation.  
After fitting a rearward-facing child restraint  
system to the front passenger seat:  
PASSENGER AIR BAG OFF must be lit continu‐  
ously.  
If you secure a child in a forward-facing child  
restraint system on the front passenger seat  
that is positioned too close to the cockpit, in  
the event of an accident, the child could:  
R
come into contact with the vehicle inte‐  
When fitting a child restraint system to the front  
passenger seat, observe the vehicle-specific  
information (/ page 65).  
Depending on the child restraint system and the  
stature of the child, the PASSENGER AIR BAG  
OFF indicator lamp may be off. In this case, do  
rior if the PASSENGER AIR BAG OFF indi‐  
cator lamp is lit, for example  
R
be struck by the airbag if the PASSENGER  
AIR BAG OFF indicator lamp is off.  
48 Occupant safety  
-
A person on the front passenger seat must  
always observe the following information:  
If the PASSENGER AIR BAG OFF indicator  
lamp is lit continuously: the person of  
smaller stature should not use the front  
passenger seat.  
#
Always move the front passenger seat  
as far back as possible and fully retract  
the seat cushion length adjustment.  
While doing so, always make sure that  
the shoulder belt strap is correctly  
routed from the seat belt outlet of the  
vehicle to the shoulder belt guide on  
the child restraint system. The shoulder  
belt strap must be routed forwards and  
downwards from the seat belt outlet. If  
necessary, adjust the seat belt outlet  
and the front passenger seat accord‐  
ingly.  
R
If the front passenger seat is occupied by an  
adult or a person with a stature correspond‐  
ing to that of an adult, the PASSENGER AIR  
BAG OFF indicator lamp must be off. This  
indicates that the front passenger airbag is  
enabled.  
&
WARNING Risk of injury or death when  
the PASSENGER AIR BAG OFF indicator  
lamp is lit  
If the PASSENGER AIR BAG OFF indicator  
lamp remains lit after the self-test, the co-  
driver airbag is disabled.  
If the co-driver seat is occupied, always  
ensure that:  
If the PASSENGER AIR BAG OFF indicator  
lamp is lit continuously, an adult or person  
with a build corresponding to that of an adult  
should not use the front passenger seat.  
Instead, they should use a rear seat.  
#
Always comply with the child restraint  
system manufacturer's installation  
instructions.  
R
The classification of the person in the co-  
R
If the front passenger seat is occupied by a  
driver seat is correct, and the co-driver  
airbag is enabled or disabled as is appro‐  
priate for the person in the co-driver seat.  
person of smaller stature (e.g. a teenager or  
small adult), the PASSENGER AIR BAG OFF  
indicator lamp either lights up continuously  
or remains off, depending on the classifica‐  
tion.  
When fitting a child restraint system to the front  
passenger seat, observe the vehicle-specific  
information (/ page 65).  
If a person is sitting on the front passenger  
seat: PASSENGER AIR BAG OFF may be lit con‐  
tinuously or be off, depending on the person's  
stature.  
R
The person is seated properly with a cor‐  
rectly fastened seat belt.  
-
If the PASSENGER AIR BAG OFF indicator  
lamp is off: move the front passenger  
seat as far back as possible, or the per‐  
son of smaller stature should use a rear  
seat.  
Be sure to also observe the following further  
related subjects:  
R
Securing the child restraint system on the  
front passenger seat (/ page 65)  
Occupant safety 49  
Function of PRE-SAFE® PLUS (anticipatory  
occupant protection plus)  
PRE-SAFE® Sound: provided that the multi‐  
media system is switched on, generates a  
brief noise signal to stimulate the innate pro‐  
tective mechanism of a person's hearing.  
R
R
Suitable positioning of the child restraint sys‐  
tem (/ page 55)  
PRE-SAFE® PLUS can detect certain impacts,  
particularly an imminent rear impact, and take  
pre-emptive measures to protect the vehicle  
occupants. These measures cannot necessarily  
prevent an imminent impact.  
PRE-SAFE® PLUS can implement the following  
measures independently of each other:  
PRE-SAFE® system  
PRE-SAFE® (anticipatory occupant protec‐  
tion)  
NOTE Damage caused by objects in the  
footwell or behind the seat  
*
PRE-SAFE® is able to detect certain critical driv‐  
ing situations and implement pre-emptive meas‐  
ures to protect the vehicle occupants.  
PRE-SAFE® can implement the following meas‐  
ures independently of each other:  
The automatic adjustment of the seat posi‐  
tion may result in damage to the seat and/or  
the object.  
R
Tightening the seat belts on the driver's seat  
and front passenger seat.  
#
Stow objects in a suitable place.  
R
Activating the rear hazard warning lights at a  
higher flashing frequency.  
Reversing the PRE-SAFE® system measures  
R
Tightening the seat belts on the driver's seat  
and front passenger seat.  
Closing the side windows.  
Vehicles with sliding sunroof: close the  
sliding sunroof.  
Vehicles with memory function: move the  
front passenger seat to a more favourable  
seat position.  
Vehicles with multicontour seat: increase  
R
Increasing brake pressure when the vehicle  
If an accident did not occur, the pre-emptive  
measures that were taken are reversed.  
You will need to perform certain settings your‐  
self.  
R
is stationary. This brake application is cancel‐  
led automatically when the vehicle pulls  
away.  
R
R
If an accident did not occur, the pre-emptive  
measures that were taken are reversed.  
#
If the seat belt pre-tensioning is not reduced,  
move the seat backrest back slightly.  
The locking mechanism releases.  
R
the air pressure in the seat side bolsters of  
the seat backrest.  
50 Occupant safety  
System limits  
The generic term child restraint system  
dren are travelling in the vehicle  
(/ page 51).  
The system will not initiate any action in the fol‐  
lowing situations:  
The generic term child restraint system is used  
in this Owner's Manual. A child restraint system  
is, for example:  
Be diligent  
R
when reversing  
Bear in mind that negligence when securing a  
child in the child restraint system may have seri‐  
ous consequences. Always be diligent in secur‐  
ing a child carefully before every journey.  
To improve protection for children younger than  
twelve years old or under 1.50 m in height,  
Mercedes-Benz recommends you observe the  
following information:  
R
a baby car seat  
or  
R
a rearward-facing child seat  
R
when the vehicle is towing a trailer and there  
is a risk of a rear impact  
R
a forward-facing child seat  
R
a child booster seat with a backrest and seat  
belt guide  
The system will not initiate any braking applica‐  
tion in the following situations:  
Mercedes-Benz recommends using a child  
booster seat with a backrest.  
R
whilst driving  
R
Always secure the child in a child restraint  
system suitable for this Mercedes-Benz vehi‐  
cle.  
The child restraint system must be appropri‐  
ate to the age, weight and size of the child.  
or  
The child restraint system must be appropriate  
to the age, weight and size of the child.  
R
when entering or exiting a parking space  
while using Active Parking Assist  
R
Observe laws and legal requirements  
Always observe the legal requirements when  
using a child restraint system in the vehicle.  
Make sure that the child restraint system is  
approved in accordance with the valid test speci‐  
fications and guidelines. Further information can  
be obtained at a qualified specialist workshop.  
Mercedes-Benz recommends that you use a  
Mercedes-Benz Service Centre for this purpose.  
Safely transporting children in the vehicle  
Always observe when children are travelling  
in the vehicle  
R
The vehicle seat must be suitable for fitting a  
child restraint system (/ page 55).  
Accident statistics show that children secured  
on the rear seats are generally safer than chil‐  
dren secured on the front seats. For this reason,  
Mercedes-Benz strongly advises that you fit a  
child restraint system to a rear seat.  
% Also strictly observe the safety notes for the  
specific situation. In this way you can recog‐  
nise potential risks and avoid dangers if chil‐  
Occupant safety 51  
Only use approved child restraint systems  
Always secure a child restraint system cor‐  
rectly  
Simply attaching to the securing rings on the  
vehicle can reduce the risk of fitting the child  
restraint system incorrectly.  
When securing a child with the integrated seat  
belt of the ISOFIX or i-Size child restraint sys‐  
tem, always comply with the permissible gross  
weight for the child and child restraint system  
(/ page 58).  
Only child restraint systems that meet the fol‐  
lowing UNECE standards are permitted for use in  
the vehicle:  
&
WARNING Risk of injury or death due to  
incorrect installation of the child  
restraint system  
R
UN-R44  
R
UN-R129 (i-Size child restraint systems)  
The child can then not be protected or  
restrained as intended.  
Information on child restraint system approval  
categories and details on the approval label on  
the child restraint system (/ page 55).  
#
Be sure to comply with the manufactur‐  
Advantage of a rearward-facing child  
restraint system  
It is preferable to transport a baby or a small  
child in a suitable rearward-facing child restraint  
system. In this case, the child sits in the oppo‐  
site direction to the direction of travel and faces  
backwards.  
Babies and small children have comparatively  
weak neck muscles in relation to the size and  
weight of their head. The risk of injury to the cer‐  
vical spine during an accident can be reduced in  
a rearward-facing child restraint system.  
er's installation instructions for the  
child restraint system and its correct  
use.  
Detecting risks, avoiding danger  
#
Make sure that the entire base of the  
Securing systems for child restraint systems  
in the vehicle  
child restraint system always rests on  
the sitting surface of the seat.  
Only use the following securing systems for child  
restraint systems:  
#
Never place objects (e.g. cushions)  
under or behind the child restraint sys‐  
tem.  
R
the ISOFIX or i-Size mounting brackets  
R
the vehicle's seat belt system  
#
#
Use child restraint systems only with  
the original cover designed for them.  
Always replace damaged covers with  
genuine covers.  
R
the Top Tether anchorages  
Fitting an ISOFIX or an i-Size child restraint sys‐  
tem is preferred.  
52 Occupant safety  
-
Securing the child restraint system with  
the seat belt on the front passenger seat  
(/ page 66). Observe the specific  
instructions for the rearward-facing and  
forward-facing child restraint systems  
(/ page 65).  
If the front passenger seat is occupied,  
ensure, both before and during the jour‐  
ney, that the status of the front  
#
Only affix accessories which have been  
specially approved for this child  
restraint system by the child restraint  
system's manufacturer.  
&
WARNING Risk of injury or death due to  
unsecured child restraint systems in the  
vehicle  
If the child restraint system is incorrectly fit‐  
ted or not secured, it can come loose.  
The child restraint system could be flung  
around and hit vehicle occupants.  
Mercedes‑Benz recommends Mercedes-Benz  
care products for cleaning child restraint sys‐  
tems recommended by Mercedes-Benz.  
#
Always install child restraint systems  
correctly, even when not in use.  
Always comply with the child restraint  
system manufacturer's installation  
instructions.  
Only use child restraint systems which are in  
proper working condition  
passenger airbag is correct for the cur‐  
rent situation (/ page 46).  
#
R
R
Observe the warning labels in the vehicle  
interior and on the child restraint system.  
Also secure Top Tether if present.  
&
WARNING Risk of injury or death caused  
by the use of damaged child restraint  
systems  
R
Always observe the child restraint system  
manufacturer's installation and operating  
instructions as well as the vehicle-specific  
information:  
Child restraint systems or their retaining sys‐  
tems that have been subjected to stress in  
an accident may not be able to perform their  
intended protective function.  
It may be the case that the child cannot be  
properly restrained.  
Do not modify the child restraint system  
&
WARNING Risk of injury due to modifi‐  
cations to the child restraint system  
-
Fitting the ISOFIX or i-Size child restraint  
system to the rear seat (/ page 58).  
Securing the child restraint system with  
the seat belt on the rear seat  
(/ page 63).  
The child restraint system can no longer  
function properly. This poses an increased  
risk of injury.  
-
#
Always immediately replace child  
restraint systems that have been dam‐  
aged or involved in an accident.  
#
Never modify a child restraint system.  
Occupant safety 53  
#
#
#
#
#
Have the securing systems for the child  
restraint systems checked at a qualified  
specialist workshop before installing a  
child restraint system again.  
Never leave children unattended in the  
vehicle.  
Never leave children unattended in the  
vehicle.  
When leaving the vehicle, always take  
the key with you and lock the vehicle.  
Observe when stopping or parking  
Keep the key out of reach of children.  
&
Avoid direct sunlight  
WARNING Risk of accident and injury  
due to children left unattended in the  
vehicle  
This also applies to the Digital Vehicle Key  
sticker.  
&
WARNING Risk of burns when the child  
seat is exposed to direct sunlight  
If children are left unsupervised in the vehi‐  
cle, they could, in particular:  
If the child restraint system is exposed to  
direct sunlight or heat, parts could heat up.  
Children could suffer burns from these parts,  
particularly on the metallic parts of the child  
restraint system.  
&
WARNING Risk of fatal injury due to  
exposure to extreme heat or cold in the  
vehicle  
R
open doors, thereby endangering other  
persons or road users.  
get out and be struck by oncoming traf‐  
fic.  
operate vehicle equipment and become  
trapped, for example.  
R
If people –particularly children – are exposed  
to extreme temperatures over an extended  
period of time, there is a risk of serious or  
even fatal injury!  
#
Always make sure that the child  
restraint system is not exposed to  
direct sunlight.  
Protect the child restraint system, e.g.  
with a blanket.  
If the child restraint system has been  
exposed to direct sunlight, allow it to  
cool before securing a child in it.  
R
#
Never leave anyone – particularly chil‐  
dren – unattended in the vehicle.  
Never leave animals in the vehicle unat‐  
tended.  
In addition, the children could also set the  
vehicle in motion, for example by:  
#
#
R
releasing the parking brake.  
changing the transmission position.  
starting the vehicle.  
#
R
R
54 Occupant safety  
Overview of recommended child restraint  
systems  
Category I (9 to 18 kg and between approx.  
9 months and 4 years)  
Category I (9 to 18 kg and from approx‐  
imately 9 months to 4 years)  
DUO plus  
DUO plus  
% Further information on the correct child  
restraint system can be obtained at a quali‐  
fied specialist workshop. Mercedes-Benz  
recommends that you use a Mercedes-Benz  
Service Centre for this purpose.  
Type1  
Type1  
Size category  
Approval  
B1  
Approval  
E1 04 301 133  
Order number2  
E1 04 301 133  
A 000 970 43 02  
2 With colour code 9H95.  
A 000 970 43 02  
2 With colour code 9H95.  
Order number2  
1 Manufacturer: Britax Römer.  
Securing with ISOFIX  
1 Manufacturer: Britax Römer.  
Category II/III (15 to 36 kg and from approx‐  
imately 4 to 12 years)  
Category 0+ (up to 13 kg and approx.  
15 months)  
Securing with the vehicle seat belt  
Type1  
Type1  
KIDFIX XP  
BABY SAFE plus  
Category 0 (up to 10 kg and approx.  
6 months) and category 0+ (up to 13 kg and  
approx. 15 months)  
Approval  
Order number2  
Type1  
E1 04 301 304  
A 000 970 49 02  
AMG KIDFIX XP  
Size category  
Approval  
E
E1 04 301 146  
B6 6 86 8224  
2 With colour code 9H95.  
Type1  
BABY SAFE plus II  
Order number2  
Approval  
E1 04 301 146  
1 Manufacturer: Britax Römer.  
Approval  
E1 04 301 304  
Order number2  
A 000 970 38 02  
2 With colour code 9H95.  
Order number2  
A 000 970 33 02  
2 With colour code 9H95.  
1 Manufacturer: Britax Römer.  
1 Manufacturer: Britax Römer.  
Occupant safety 55  
Overview of suitable seats in the vehicle for  
fitting a child restraint system  
is correct for the current situation  
There may be further information such as the  
ISOFIX size categories, depending on the  
approval category of the child restraint system.  
(/ page 46).  
R
Observe the notes on automatic front  
passenger airbag shutoff (/ page 44)  
Left/right rear seat  
Approval categories in accordance with UN-  
R44  
Preferred securing system:  
® ISOFIX child seat securing system  
(/ page 57)  
Centre rear seat  
Securing system:  
Vehicle seat belt (/ page 62)  
7
or  
° i-Size child seat securing system  
(/ page 58)  
¯ Also secure Top Tether if present  
(/ page 60)  
Approval categories for child restraint sys‐  
tems  
Only use approved child restraint systems  
Alternative securing system:  
Only child restraint systems that meet the fol‐  
lowing UNECE standards are permitted for use in  
the vehicle:  
Vehicle seat belt (/ page 62)  
7
Front passenger seat  
R
UN-R44  
Securing system:  
R
UN-R129 (i-Size child restraint systems)  
Vehicle seat belt (/ page 62)  
7
Identification on the child restraint system  
Information about the approval category, weight  
category and approval number, for example, is  
on the approval label on the child restraint sys‐  
tem.  
Be sure to observe:  
R
If the front passenger seat is occupied,  
Example of an approval label  
ensure, both before and during the journey,  
that the status of the front passenger airbag  
R
Universal: child restraint systems in the  
"Universal" category are approved for instal‐  
56 Occupant safety  
Approval categories in accordance with UN-  
R129  
lation in vehicles. They can be used, in  
accordance with overviews of the suitability  
of seats for securing child restraint systems,  
on seats labelled U, UF or IUF.  
The identification IUF refers to ISOFIX child  
restraint systems in the "Universal" category.  
These child restraint systems must also be  
secured using Top Tether or support points.  
suitability of seats for securing child restraint  
systems, on seats labelled i‑U.  
The identification i‑U refers to i‑Size child  
restraint systems in the "Universal" category.  
These child restraint systems must also be  
secured using Top Tether or support points.  
Observe the suitability of vehicle seats  
Depending on the approval category, there are  
forward-facing and rearward-facing child  
restraint systems. Their use can be restricted for  
certain vehicle seats:  
R
Semi-Universal: child restraint systems in  
the "Semi-Universal" category may only be  
used if the vehicle and vehicle seat are listed  
in the child restraint system manufacturer's  
vehicle model list.  
R
Suitability of the seats for attaching ISOFIX  
child restraint systems (/ page 57)  
R
Vehicle-specific: child restraint systems in  
R
Suitability of seats for securing i‑Size child  
restraint systems (/ page 58).  
the "vehicle-specific" category may only be  
used if the vehicle and vehicle seat are listed  
in the child restraint system manufacturer's  
vehicle model list.  
R
Suitability of seats for attaching belt-secured  
child restraint systems (/ page 62)  
Example of an approval label  
R
i‑Size: child restraint systems in the "i‑Size"  
category are approved for installation in vehi‐  
cles with i‑Size mounting brackets. They can  
be used, in accordance with overviews of the  
Occupant safety 57  
Fitting an ISOFIX or i-Size child restraint sys‐  
tem on the rear seat  
Weight group 0 (up to 10 kg and up to  
approx. 6 months)  
Size class –  
Equipment  
Left/right rear seat  
Size class –  
Equipment  
Left/right rear seat  
Overview of suitability of the seats for  
attaching ISOFIX child restraint systems  
C – ISO/R3  
IL (1)  
ISOFIX is a standardised securing system for  
specially designed restraint systems.  
® The symbol indicates seats suitable for  
attaching an ISOFIX child restraint system  
in accordance with UN R44 (/ page 55).  
IL Suitable for ISOFIX child restraint systems according to the  
table in "Overview of the recommended child restraint systems",  
or if the vehicle and the seat are listed on the child restraint sys‐  
tem manufacturer's vehicle model list.  
E – ISO/R1  
IL  
IL Suitable for ISOFIX child restraint systems according to the  
table in "Overview of the recommended child restraint systems",  
or if the vehicle and the seat are listed on the child restraint sys‐  
tem manufacturer's vehicle model list.  
(1) When using a child restraint system of size class (ISO/R3),  
move the front seat into the highest position. Make sure that the  
seat backrest of the front seat does not rest against the child  
restraint system.  
Attach only child restraint systems that  
are approved in accordance with UN R44  
as per the following ISOFIX tables.  
Weight group 0+ (up to 13 kg and up to  
approx. 15 months)  
Carry cot  
Size class –  
Equipment  
Left/right rear seat  
Weight group 1 (9–18 kg and approx. 9  
months to 4 years)  
Size class –  
Equipment  
Left/right rear seat  
Size class –  
Equipment  
Left/right rear seat  
E – ISO/R1  
D – ISO/R2  
IL  
IL  
F – ISO/L1  
G – ISO/L2  
X
X
D – ISO/R2  
C – ISO/R3  
B – ISO/F2  
IL  
X Not suitable for an ISOFIX child restraint system in this weight  
group and/or size class.  
IL (1)  
IUF  
58 Occupant safety  
Fitting an ISOFIX or i‑Size child restraint sys‐  
tem on the rear seat  
in accordance with UN R129  
Size class –  
Equipment  
Left/right rear seat  
(/ page 55).  
Child restraint systems that are permitted  
in accordance with UN R44 as per the  
ISOFIX tables (/ page 57) or UN R129 as  
per the following i‑Size tables may be  
attached.  
&
WARNING Risk of accident if the rear  
bench seat, rear seat and seat backrest  
are not engaged  
B1 – ISO/F2X  
A – ISO/F3  
IUF  
IUF  
The rear bench seat, rear seat and seat back‐  
rest may fold forwards, even while the vehi‐  
cle is in motion.  
IL Suitable for ISOFIX child restraint systems according to the  
table in "Overview of the recommended child restraint systems",  
or if the vehicle and the seat are listed on the child restraint sys‐  
tem manufacturer's vehicle model list.  
i‑Size child restraint systems (ISO/R2, ISO/  
F2X, ISO/B2, ISO/B3)  
R
As a result, the vehicle occupant will be  
Front passenger  
seat  
Left/right rear seat  
pressed into the seat belt with increased  
force. The seat belt will not be able to  
protect as intended and could cause  
additional injury.  
IUF Suitable for forward-facing ISOFIX child restraint systems of  
the "Universal" category in this weight group.  
X
i‑U  
(1) When using a child restraint system of size class (ISO/R3),  
move the front seat into the highest position. Make sure that the  
seat backrest of the front seat does not rest against the child  
restraint system.  
X Not suitable for an i-Size  
child restraint system in the  
"Universal" category.  
i-U Suitable for forward-facing  
and rearward-facing i-Size  
child restraint systems in the  
"Universal" category.  
R
Objects or loads in the boot or load com‐  
partment cannot be restrained by the  
seat backrest.  
#
Make sure that the rear bench seat, the  
Overview of suitability of the seats for  
attaching i‑Size child restraint systems  
rear seat and the seat backrest are  
engaged before every trip.  
i‑Size is a standardised securing system for spe‐  
cially designed restraint systems.  
If the left and right seat backrests are not  
engaged and locked in place, this will be shown  
° The symbol indicates seats suitable for  
attaching an i‑Size child restraint system  
Occupant safety 59  
on the multifunction display on the instrument  
cluster.  
If the centre seat backrest is not engaged and  
locked in place, the red lock verification indica‐  
tor will be visible.  
Always comply with the information about the  
mass of the child restraint system:  
Always comply with the manufacturer's  
installation and operating instructions for  
the child restraint system used.  
Make sure that the child's feet do not touch  
the front seat. If necessary, move the front  
seat slightly forwards.  
O
O
R
in the manufacturer's installation and operat‐  
ing instructions for the child restraint system  
used  
R
on a label on the child restraint system, if  
present  
&
WARNING Risk of injury or death if the  
permissible gross mass of the child and  
child restraint system is exceeded.  
®When fitting an ISOFIX child restraint sys‐  
tem, also observe the following:  
Regularly check that the permissible gross mass  
of the child and child restraint system is still  
complied with.  
When fitting a child restraint system, observe  
the following:  
When using a Group 0/0+ baby car seat  
O
Too much load may be placed on the ISOFIX  
or i‑Size child restraint systems and the child  
may not be restrained correctly in the event  
of an accident, for example.  
and a Group 1 rearward-facing child  
restraint system on a rear seat: adjust  
the front seat so that the seat does not  
touch the child restraint system.  
Always observe the correct use of the seats  
and consider their suitability for attaching a  
child restraint system.  
O
#
If the child and the child restraint sys‐  
When using a Group 1 forward-facing  
child restraint system: remove the head  
restraint from the respective seat, if possi‐  
ble. In addition, the backrest of the child  
restraint system must lie as flat as possible  
against the backrest of the vehicle seat.  
After the child restraint system has been  
removed, replace the head restraint immedi‐  
ately and adjust all head restraints cor‐  
rectly.  
O
tem together weigh more than 33 kg,  
use only an ISOFIX or i‑Size child  
restraint system that secures the child  
using the vehicle seat belt.  
ISOFIX child seat securing system  
(/ page 57)  
or  
i‑Size child seat securing system  
(/ page 58)  
#
Also secure the child restraint system  
with the Top Tether belt, if available.  
60 Occupant safety  
For certain child restraint systems in weight  
group 2 or 3, there may be restrictions on  
the maximum size setting, e.g. due to possi‐  
ble contact with the roof.  
The child restraint system must not be ten‐  
sioned between the roof and the seat cush‐  
ion and/or be fitted facing the wrong direc‐  
tion. Where possible, adjust the seat cush‐  
ion inclination accordingly.  
After the child restraint system has been  
system is engaged correctly in both mounting  
O
removed, replace the head restraint immedi‐ brackets in the vehicle.  
ately and adjust all head restraints cor‐  
NOTE Damage to the seat belt for the  
centre seat during installation of the  
child restraint system  
rectly.  
*
O
#
Make sure that the seat belt is not trap‐  
ped.  
#
Attach the ISOFIX or i‑Size child restraint sys‐  
tem to both mounting brackets in the vehicle.  
The child restraint system must not be put  
under strain by the head restraint. Adjust  
the head restraints accordingly.  
O
Securing a Top Tether  
° When fitting an i‑Size child restraint sys‐  
tem, also observe the following:  
&
WARNING Risk of injury or death if the  
rear seat backrests are not locked after  
fitting Top Tether belts  
When using a rearward-facing child  
restraint system: adjust the front seat so  
that it does not touch the child restraint sys‐  
tem.  
O
The rear seat backrests may fold forwards  
when driving.  
In this case, child restraint systems may no  
longer perform their intended protective  
function. Additional injuries may also be  
caused.  
When using a forward-facing child  
restraint system: remove the head  
O
1
2
ISOFIX mounting bracket  
i‑Size mounting bracket  
restraint from the respective seat, if possi‐  
ble. In addition, the backrest of the child  
restraint system must lie as flat as possible  
against the backrest of the vehicle seat.  
Before every journey, make sure that the ISOFIX  
child restraint system or the i‑Size child restraint  
Occupant safety 61  
#
#
Always lock rear seat backrests after  
fitting Top Tether belts.  
Pay attention to the lock verification  
indicator.  
If the left and right seat backrests are not  
engaged and locked in place, this will be shown  
on the multifunction display on the instrument  
cluster.  
If the centre seat backrest is not engaged and  
locked in place, the red lock verification indica‐  
tor will be visible.  
¯ If the child restraint system is equipped  
with a Top Tether belt:  
#
#
#
Guide Top Tether belt 4 under head  
restraint 1 between the two head restraint  
bars.  
Hook Top Tether hook 5 of Top Tether belt  
4 into Top Tether anchorage 3 without  
twisting.  
Tension Top Tether belt 4. In doing so, com‐  
ply with the child restraint system manufac‐  
turer's installation instructions.  
The risk of injury can be reduced by a Top  
Tether. The Top Tether belt enables an  
additional connection between the child  
restraint system attached with ISOFIX or  
i‑Size and the vehicle.  
#
#
#
If necessary, slide head restraint 1 upwards  
(/ page 101).  
Fold up cover 2 of Top Tether anchorage  
3.  
#
#
Fold down cover 2 of Top Tether anchorage  
3.  
Fit the ISOFIX or i‑Size child restraint system  
with Top Tether. In doing so, comply with the  
child restraint system manufacturer's instal‐  
lation instructions.  
If necessary, slide head restraint 1 down‐  
wards (/ page 101). Make sure that you do  
62 Occupant safety  
Notes on child restraint systems on the front  
passenger seat  
not interfere with the correct routing of Top  
Weight category II: 15 to 25 kg  
Left/right rear seat  
Tether belt 4.  
R
If it is absolutely necessary for you to fit a  
U, L  
U, L  
child restraint system to the front passenger  
seat, be sure to observe the information on  
child restraint systems on the front  
passenger seat (/ page 66).  
Securing the child restraint system with the  
seat belt  
Centre rear seat1  
Weight category III: 22 to 36 kg  
Left/right rear seat  
Notes on the suitability of seats for attach‐  
ing belt-secured child restraint systems  
R
U, L  
U, L  
Observe the specific instructions for the  
rearward-facing and forward-facing child  
restraint systems. If the front passenger seat  
is occupied, ensure, both before and during  
the journey, that the status of the front  
passenger airbag is correct for the current  
situation (/ page 46).  
Rear seats  
Centre rear seat1  
Weight category 0: up to 10 kg  
1 Child restraint systems with a supporting bracket  
are not suitable for this seat.  
Left/right rear seat  
U, L  
U, L  
Centre rear seat1  
U Suitable for child restraint systems of the "Univer‐  
sal" category in this weight category.  
Front passenger seat  
Weight category 0+: up to 13 kg  
Left/right rear seat  
L Suitable for semi-universal child restraint systems  
according to the table in "Recommended child  
restraint systems", or if the vehicle and the seat are  
listed in the child restraint system manufacturer's  
vehicle model list.  
Weight category 0: up to 10 kg  
U, L  
U, L  
Front passenger airbag enabled1  
Front passenger airbag disabled1, 2  
Weight category 0+: up to 13 kg  
X
Centre rear seat1  
U, L  
Weight category I: 9 to 18 kg  
Left/right rear seat  
U, L  
U, L  
Front passenger airbag enabled 1  
X
Centre rear seat1  
Occupant safety 63  
Securing the child restraint system with the  
seat belt on the rear seat  
2 The vehicle is equipped with automatic front  
passenger airbag shutoff. The PASSENGER AIR BAG  
OFF indicator lamp must be lit.  
Front passenger airbag disabled1, 2  
U, L  
Weight category I: 9 to 18 kg  
&
WARNING Risk of accident if the rear  
bench seat, rear seat and seat backrest  
are not engaged  
Front passenger airbag enabled 1  
Front passenger airbag disabled1, 2  
Weight category II: 15 to 25 kg  
UF, L  
U, L  
X Not suitable for children in this weight category.  
U Suitable for child restraint systems of the "Univer‐  
sal" category in this weight category.  
The rear bench seat, rear seat and seat back‐  
rest may fold forwards, even while the vehi‐  
cle is in motion.  
L Suitable for semi-universal child restraint systems  
according to the table in "Recommended child  
restraint systems", or if the vehicle and the seat are  
listed in the child restraint system manufacturer's  
vehicle model list.  
Front passenger airbag enabled 1  
Front passenger airbag disabled1, 2  
Weight category III: 22 to 36 kg  
UF, L  
U, L  
R
As a result, the vehicle occupant will be  
pressed into the seat belt with increased  
force. The seat belt will not be able to  
protect as intended and could cause  
additional injury.  
Front passenger airbag enabled1  
Front passenger airbag disabled1, 2  
UF, L  
U, L  
R
Objects or loads in the boot or load com‐  
UF Suitable for forward-facing child restraint systems  
of the "Universal" category in this weight category.  
partment cannot be restrained by the  
seat backrest.  
1 Adjust the seat cushion inclination so that the front  
edge of the seat cushion is in the highest position and  
the rear edge of the seat cushion is in the lowest posi‐  
tion.  
#
Make sure that the rear bench seat, the  
rear seat and the seat backrest are  
engaged before every trip.  
If the left and right seat backrests are not  
engaged and locked in place, this will be shown  
64 Occupant safety  
on the multifunction display on the instrument  
cluster.  
If the centre seat backrest is not engaged and  
locked in place, the red lock verification indica‐  
tor will be visible.  
restraint from the respective seat, if possi‐  
ble.  
After the child restraint system has been  
removed, replace the head restraint immedi‐  
ately and adjust all head restraints cor‐  
rectly.  
The backrest of the forward-facing child  
restraint system must, as far as possible, be  
resting on the seat backrest of the rear  
seat.  
For certain child restraint systems in weight  
category II or III, there may be restrictions  
on the maximum size setting, e.g. due to  
possible contact with the roof.  
The child restraint system must not be put  
under strain between the roof and the seat  
cushion and/or be fitted facing the wrong  
direction. Where possible, adjust the seat  
cushion inclination accordingly.  
The child restraint system must not be put  
under strain by the head restraint. Adjust  
the head restraints accordingly.  
Make sure that the child's feet do not touch  
the front seat. If necessary, move the front  
seat slightly forwards.  
O
#
Install the child restraint system.  
The entire base of the child restraint system  
must always rest on the sitting surface of the  
rear seat.  
Always make sure that the shoulder belt  
strap is correctly routed from the seat belt  
outlet of the vehicle to the shoulder belt  
guide on the child restraint system.  
The shoulder belt strap must be routed for‐  
wards and downwards from the seat belt out‐  
let.  
When fitting a belt-secured child restraint  
system, observe the following:  
O
O
O
Always comply with the manufacturer's  
installation and operating instructions for  
the child restraint system used.  
For a child restraint system in the "Univer‐  
sal" or "Semi-Universal" category, make  
sure that the system has been approved for  
the vehicle seat.  
O
O
#
Observe the notes under "Suitability of  
seats for attaching belt-secured child  
restraint systems" (/ page 62).  
When using a category 0/0+ baby car  
seat and a category I rearward-facing  
child restraint system on a rear seat:  
adjust the front seat so that the seat does  
not touch the child restraint system.  
O
O
O
When using a category I forward-facing  
child restraint system: remove the head  
Occupant safety 65  
Notes on vehicles without automatic front  
passenger airbag shutoff  
Notes on rearward-facing and forward-facing  
child restraint systems on the front  
passenger seat  
Make sure you observe the following informa‐  
tion:  
R
Never fit a rearward-facing child restraint  
system to the front passenger seat  
&
WARNING Risk of injury or death when  
using a rearward-facing child restraint  
system while the front passenger airbag  
is enabled  
R
Always fit a rearward-facing child restraint  
system to a suitable rear seat  
-
Suitability of seats for attaching belt-  
secured child restraint systems  
If you secure a child in a rearward-facing  
child restraint system on the front passenger  
seat and the PASSENGER AIR BAG OFF indi‐  
cator lamp is off, the front passenger airbag  
can deploy in the event of an accident.  
(/ page 62).  
-
Secure the child restraint system with the  
seat belt on the rear seat (/ page 63).  
R
Notes on rearward-facing and forward-facing  
child restraint systems on the front  
passenger seat (/ page 65).  
The child could be struck by the airbag.  
Always ensure that the front passenger air‐  
bag is disabled. The PASSENGER AIR BAG  
OFF indicator lamp must be lit.  
NEVER use a rearward-facing child restraint  
system on a seat with an ENABLED FRONT  
AIRBAG; DEATH or SERIOUS INJURY to the  
CHILD can occur.  
Sticker visible when the front passenger door  
is open  
Vehicles without automatic front passenger air‐  
bag shutoff have a special sticker affixed to the  
side of the cockpit on the front passenger side.  
66 Occupant safety  
Observe the specific instructions for the rear‐  
ward-facing and forward-facing child restraint  
systems (/ page 66).  
passenger airbag must always be disabled.  
This is only the case if the PASSENGER AIR  
BAG OFF indicator lamp is lit continuously  
(/ page 46).  
When using a forward-facing child restraint  
system in category I: remove the head  
restraint from the respective seat, if possi‐  
ble.  
O
R
If the PASSENGER AIR BAG OFF indicator  
lamp is off, the front passenger airbag is ena‐  
bled. The front passenger airbag may deploy  
during an accident.  
After the child restraint system has been  
removed, replace the head restraint immedi‐  
ately and adjust all head restraints cor‐  
rectly.  
The backrest of the forward-facing child  
restraint system must, as far as possible, be  
resting on the seat backrest of the front  
passenger seat.  
For certain child restraint systems in weight  
category II or III, there may be restrictions  
on the maximum size setting, e.g. due to  
possible contact with the roof.  
The child restraint system must not be put  
under strain between the roof and the seat  
cushion and/or be fitted facing the wrong  
direction.  
The child restraint system must not be put  
under strain by the head restraint. Adjust  
the head restraints accordingly.  
O
O
O
O
Securing the child restraint system with the  
seat belt on the front passenger seat  
When fitting a belt-secured child restraint sys‐  
tem on the front passenger seat, always observe  
the following:  
Warning notice on the front passenger sun visor  
Observe the child restraint system manufac‐  
turer's installation and operating instruc‐  
tions.  
O
Always observe the status of the front passenger  
airbag on the PASSENGER AIR BAG OFF indica‐  
tor lamp:  
For a child restraint system in the "Univer‐  
sal" or "Semi-Universal" category, make  
sure that the system has been approved for  
the vehicle seat.  
O
R
If it is absolutely necessary to fit a child  
restraint system to the front passenger seat,  
always observe the information on automatic  
front passenger airbag shutoff (/ page 44).  
Observe the notes under "Suitability of  
seats for attaching belt-secured child  
restraint systems" (/ page 62).  
R
When using a rearward-facing child restraint  
system on the front passenger seat, the front  
Occupant safety 67  
Never place objects (e.g. cushions) under or  
behind the child restraint system.  
outlet of the vehicle to the shoulder belt  
guide on the child restraint system.  
The shoulder belt strap must be routed for‐  
wards and downwards from the seat belt out‐  
let.  
If necessary, adjust the seat belt outlet and  
the front passenger seat accordingly.  
O
R
operate vehicle equipment and become  
trapped, for example.  
#
Set the front passenger seat as far back as  
possible and move the seat into the highest  
position if possible.  
Fully retract the seat cushion length adjust‐  
ment.  
Adjust the seat cushion inclination so that  
the front edge of the seat cushion is in the  
highest position and the rear edge of the  
seat cushion is in the lowest position.  
Set the seat backrest to the most vertical  
position possible.  
In addition, the children could also set the  
vehicle in motion, for example by:  
R
releasing the parking brake.  
changing the transmission position.  
starting the vehicle.  
#
#
#
R
R
Child safety locks  
#
Never leave children unattended in the  
vehicle.  
When leaving the vehicle, always take  
the key with you and lock the vehicle.  
Activating or deactivating the child safety  
lock for the rear doors  
#
#
#
&
WARNING Risk of accident and injury  
due to children left unattended in the  
vehicle  
#
Keep the key out of reach of children.  
Fit the child restraint system.  
The entire base of the child restraint system  
must always rest on the sitting surface of the  
front passenger seat.  
This also applies to the Digital Vehicle Key  
sticker.  
If children are left unsupervised in the vehi‐  
cle, they could, in particular:  
&
WARNING Risk of fatal injury due to  
exposure to extreme heat or cold in the  
vehicle  
#
R
open doors, thereby endangering other  
Always make sure that the shoulder belt  
strap is correctly routed from the seat belt  
persons or road users.  
R
get out and be struck by oncoming traf‐  
fic.  
If people –particularly children – are exposed  
to extreme temperatures over an extended  
68 Occupant safety  
#
#
period of time, there is a risk of serious or  
even fatal injury!  
Never leave children unattended in the  
vehicle.  
When leaving the vehicle, always take  
the key with you and lock the vehicle.  
#
Never leave anyone – particularly chil‐  
dren – unattended in the vehicle.  
#
Never leave animals in the vehicle unat‐  
tended.  
This also applies to the Digital Vehicle Key  
sticker.  
Vehicles for the United Kingdom: observe the  
important safety notes in the "Notes on the addi‐  
tional door lock" section.  
There are child safety locks for the rear doors  
and the rear side windows.  
The child safety lock on the rear doors secures  
each door separately. The doors can no longer  
be opened from the inside.  
&
WARNING Risk of accident and injury  
due to children left unattended in the  
vehicle  
If children are travelling in the vehicle, they  
could, in particular:  
R
open doors, thereby endangering other  
persons or road users.  
#
#
Press the lever in direction 1 (activate) or  
2 (deactivate).  
R
get out and be struck by oncoming traf‐  
fic.  
Make sure that the child safety locks are  
working properly.  
R
operate vehicle equipment and become  
trapped, for example.  
#
Always activate the installed child  
safety locks if children are travelling in  
the vehicle.  
Occupant safety 69  
Activating or deactivating the child safety  
lock for the rear side windows  
R
indicator lamp 1 is off: via the switch on  
the corresponding rear door or driver's  
door  
#
#
Never leave animals in the vehicle unat‐  
tended.  
Always correctly secure animals while  
driving, e.g. using a suitable animal car‐  
rier.  
Notes on pets in the vehicle  
&
WARNING Risk of accident and injury  
due to animals left unsecured or unat‐  
tended in the vehicle  
If you leave animals in the vehicle unatten‐  
ded or unsecured, they could possibly press  
down buttons or switches.  
Thereby an animal may:  
R
activate vehicle equipment and become  
trapped, for example  
R
switch systems on or off and endanger  
other road users  
#
To activate/deactivate: press button 2.  
Unsecured animals may be thrown around in  
the vehicle in the event of an accident or  
sudden steering and braking manoeuvres  
and injure vehicle occupants in the process.  
The rear side window can be opened or  
closed in the following cases:  
R
indicator lamp 1 is lit: via the switch on  
the driver's door  

Related Topics

Restraint system Seat belts Airbags PRE-SAFE? system Safely transporting children in the vehicle Notes on pets in the vehicle

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