Get Climate control Guide for Mercedes B Class SUV Second Generation (2011-2017)

Overview of climate control systems

General notes

Observe the settings recommended on the fol-

lowing pages. The windows could otherwise fog

up.

To prevent the windows from fogging up:

switch off climate control only briefly

switch on air-recirculation mode only briefly

switch on the cooling with air dehumidifica-

tion function

switch on the defrost windshield function

briefly, if required

The dual-zone automatic climate control regu-

lates the temperature and the humidity in the

vehicle interior and filters undesirable substan-

ces out of the air.

Dual-zone automatic climate control is only

operational when the vehicle is ready to drive.

Optimum operation is only achieved with the

side windows closed.

Always keep the ventilation flaps behind the

side paneling in the cargo compartment clear.

Otherwise the vehicle will not be ventilated cor-

rectly.

Ventilate the vehicle for a brief period during

warm weather, e.g. using the convenience

opening feature (Y page 76). This will speed

up the cooling process and the desired inte-

rior temperature will be reached more

quickly.

The integrated filter filters out most parti-

cles of dust and soot and completely filters

out pollen. It also reduces gaseous pollutants

and odors. A clogged filter reduces the

amount of air supplied to the vehicle interior.

For this reason, you should always observe

the interval for replacing the filter, which is

specified in the Maintenance Booklet. As it

depends on environmental conditions, e.g.

heavy air pollution, the interval may be

shorter than stated in the Maintenance Book-

let.

It is possible that under certain circumstan-

ces the residual heat function may be activa-

ted automatically an hour after the SmartKey

has been removed in order to dry the auto-

matic climate control. The vehicle is then ven-

tilated for 30 minutes.

Control panel for dual-zone automatic climate control

Sets the temperature, left (Y page 101)

;

Sets climate control to automatic (Y page 101)

Defrosts the windshield (Y page 102)

Increases the airflow (Y page 102)

Sets the air distribution (Y page 102)

Overview of climate control systems

Climate control

Display

Switches air-recirculation mode on/off (Y page 104)

Activates/deactivates climate control (Y page 100)

Sets the temperature, right (Y page 101)

Activates or deactivates maximum cooling (Y page 103)

Switches cooling with air dehumidification on/off (Y page 100)

Reduces the airflow (Y page 102)

Switches the rear window defroster on/off (Y page 103)

Switches the ZONE function on/off (Y page 102)

Optimum use of 3-zone automatic cli-

mate control

Climate control system

The following contains instructions and recom-

mendations to enable you to get the most out of

your dual-zone automatic climate control.

Activate climate control using the Ã and

¿ buttons. The indicator lamps in the

Ã and ¿ buttons light up.

Set the temperature to 72 ‡ (22 †).

Only use the "Windshield defrosting" function

briefly until the windshield is clear again.

Only use air-recirculation mode briefly, e.g. if

there are unpleasant outside odors or when in

a tunnel. The windows could otherwise fog up,

since no fresh air is drawn into the vehicle in

air-recirculation mode.

Use the ZONE function to adopt the temper-

ature settings on the driver's side for the

front-passenger side as well. The indicator

lamp in the á button goes out.

If you change the settings of the climate con-

trol system, the climate status display

appears for approximately three seconds at

the bottom of the screen in the multimedia

system display; see separate operating

instructions. You will see the current settings

of the various climate control functions.

You can choose between various drive programs

with the program selector button (Y page 114).

If you have selected drive program E+:

the cooling output is reduced when cooling

heat output is reduced when heating

the time for which the rear window defroster

will run is reduced

If you have selected drive program E or S, the

current climate settings are maintained.

Operating the climate control sys-

tems

Activates/deactivates climate con-

trol

General notes

When the climate control is switched off, the air

supply and air circulation are also switched off.

The windows could fog up. Therefore, switch off

climate control only briefly

Dual-zone automatic climate control

Turn the SmartKey to position 2 in the ignition

lock (Y page 109).

To activate: press the Ã button.

The indicator lamp in the Ã button lights

up. Airflow and air distribution are set to auto-

matic mode.

Press the ^ button.

The indicator lamp in the ^ button goes

out. The previously selected settings are

restored.

To deactivate: press the ^ button.

The indicator lamp in the ^ button lights

up.

Activate climate control primarily using the

Ã button.

Switches cooling with air dehumidifi-

cation on/off

General notes

If you deactivate the "Cooling with air-dehumid-

ification" function, the air inside the vehicle will

not be cooled. The air inside the vehicle will also

100

Operating the climate control systems

Climate control

not be dehumidified. The windows can fog up

more quickly. Therefore, only deactivate the

"Cooling with air-dehumidification" function

briefly.

The "Cooling with air-dehumidification" function

is operational when the vehicle is ready to drive.

The air inside the vehicle is cooled and dehu-

midified according to the temperature selected.

Condensation may drip from the underside of

the vehicle when it is in cooling mode. This is

normal and not a sign that there is a malfunc-

tion.

Activating/deactivating

Press the ¿ button.

The indicator lamp in the ¿ button lights

up or goes out.

The indicator lamp in the button indicates that

the respective function is activated. The

"Cooling with air dehumidification" function

has a delayed switch-off feature.

Problems with the "Cooling with air dehumidification" function

Problem

Possible causes/consequences and MM Solutions

The indicator lamp in the

¿ button flashes

three times or remains

off. The "Cooling with air

dehumidification" func-

tion cannot be switched

on.

Cooling with air dehumidification has been deactivated due to a mal-

function.

Visit a qualified specialist workshop.

Setting climate control to automatic

General notes

In automatic mode, the set temperature is main-

tained automatically at a constant level. The

system automatically regulates the temperature

of the dispensed air, the airflow and the air dis-

tribution.

The "Cooling with air dehumidification" function

is activated automatically in automatic mode.

Setting climate control to automatic

Turn the SmartKey to position 2 in the ignition

lock (Y page 109).

Set the desired temperature.

To activate: press the Ã button.

The indicator lamp in the Ã button lights

up. Automatic air distribution and airflow are

activated.

To switch to manual mode:press the É

or Ë button.

Press the K or I button.

The indicator lamp in the Ã button goes

out. Automatic air distribution and airflow are

deactivated.

Setting the temperature

Different temperatures can be set for the driv-

er's and front-passenger sides. The set temper-

ature is automatically maintained at a constant

level.

Turn the SmartKey to position 2 in the ignition

lock (Y page 109).

To increase or decrease: turn control : or

E counter-clockwise or clockwise. Only

change the temperature setting in small

increments. Start at 72 ‡ (22 †).

Operating the climate control systems

101

Climate control

Setting the air distribution

Air distribution settings

Directs air through the defroster vents

Directs air through the center and side air

vents

Directs air through the footwell air vents

Directs air through the center, side and

footwell vents

Directs air through the defroster, center

and side air vents

Directs air through the defroster and

footwell vents

Directs air through the defroster, center,

side and footwell vents

Regardless of the air distribution setting,

airflow is always directed through the side air

vents. The side air vents can only be closed if

the adjusters are turned clockwise until they

engage.

Setting the air distribution

Turn the SmartKey to position 2 in the ignition

lock (Y page 109).

Press the É or Ë button repeatedly

until the desired symbol appears in the dis-

play.

Setting the airflow

Turn the SmartKey to position 2 in the ignition

lock (Y page 109).

To increase or reduce:press the K or

I button.

Switching the ZONE function on/off

To activate: press the á button.

The indicator lamp in the á button lights

up.

The temperature setting for the driver's side

is not adopted for the front-passenger side.

To deactivate: press the á button.

The indicator lamp in the á button goes

out.

The temperature setting for the driver's side

is adopted for the front-passenger side.

Defrosting the windshield

General notes

You can use this function to defrost the wind-

shield or to clear a fogged up windshield and

side windows.

You should only select the "Windshield

defrosting" function until the windshield is

clear again.

Switching the "Windshield defrosting"

function on or off

Turn the SmartKey to position 2 in the ignition

lock (Y page 109).

To activate: press the ¬ button.

The indicator lamp in the ¬ button lights

up.

The climate control system switches to the

following functions:

high airflow

high temperature

air distribution to the windshield and front

side windows

air-recirculation mode off

Vehicles with windshield heating: the

windshield heating is switched on automati-

cally using the "Windshield defrosting" func-

tion.

The "Windshield defrosting" function auto-

matically sets the blower output to the opti-

mum defrosting effect. As a result, the airflow

may increase or decrease automatically after

the ¬ button is pressed.

You can adjust the blower output manually

while the "Windshield defrosting" function is

in operation:

Press the ó or ô button.

To deactivate: press the ¬ button.

The indicator lamp in the ¬ button goes

out. The previously selected settings are

restored. Air-recirculation mode remains

deactivated.

Press the Ã button.

The indicator lamp in the ¬ button goes

out. Airflow and air distribution are set to

automatic mode.

102

Operating the climate control systems

Climate control

Turn temperature control : or E counter-

clockwise or clockwise (Y page 99).

MAX COOL maximum cooling

The MAX COOL function is only available in vehi-

cles for the USA.

The MAX COOL function only works when the

vehicle is ready to drive.

To activate: press the Ù button.

The indicator lamp in the button lights up.

To deactivate: press the Ù button.

The indicator lamp goes out. The previously

selected settings are restored.

When you activate MAX COOL, climate control

switches to the following functions:

maximum cooling

maximum airflow

air-recirculation mode on

Defrosting the windows

Windows fogged up on the inside

Activate the ¿ "Cooling with air dehumid-

ification" function.

Activate automatic mode Ã.

If the windows continue to fog up, activate the

¬ "Windshield defrosting" function.

You should only select this setting until the

windshield is clear again.

Windows fogged up on the outside

Activate the windshield wipers.

Set the air distribution to P or O.

You should only select this setting until the

windshield is clear again.

Rear window defroster

General notes

The rear window defroster has a high current

draw. You should therefore switch it off as soon

as the rear window is clear. Otherwise, the rear

window defroster switches off automatically

after several minutes.

If the battery voltage is too low, the rear window

defroster may switch off.

Activating/deactivating

Turn the SmartKey to position 2 in the ignition

lock (Y page 109).

Press the ¤ button.

The indicator lamp in the ¤ button lights

up or goes out.

Problems with the rear window defroster

Problem

Possible causes/consequences and MM Solutions

The rear window

defroster has deactiva-

ted prematurely or can-

not be activated.

The battery has not been sufficiently charged.

Switch off any consumers that are not required, e.g. reading lamps,

interior lighting or the seat heating.

When the battery is sufficiently charged, the rear window defroster

can be activated again.

Operating the climate control systems

103

Climate control

Switching air-recirculation mode

on/off

General notes

You can deactivate the flow of fresh air if

unpleasant odors are entering the vehicle from

outside. The air already inside the vehicle will

then be recirculated.

If you switch on air-recirculation mode, the win-

dows can fog up more quickly, in particular at

low temperatures. Only use air-recirculation

mode briefly to prevent the windows from fog-

ging up.

Activating/deactivating

Turn the SmartKey to position 2 in the ignition

lock (Y page 109).

To activate: press the e button.

The indicator lamp in the e button lights

up.

Air-recirculation mode switches on automati-

cally:

at high outside temperatures

at high levels of pollution

When air-recirculation mode is activated auto-

matically, the indicator lamp in the e button

is not lit. Outside air is added after about

30 minutes.

To deactivate: press the e button.

The indicator lamp in the e button goes

out.

i Air-recirculation mode deactivates auto-

matically:

after approximately five minutes at outside

temperatures below approximately 45 ‡

(7 †)

after approximately five minutes if the

"Cooling with air dehumidification" func-

tion is deactivated

after approximately 30 minutes at outside

temperatures above approximately 45 ‡

(7 †) if the cooling with air dehumidifica-

tion function is activated

Convenience opening or closing using

the air-recirculation button

WARNING

When using the convenience closing feature,

parts of the body could be trapped in the clos-

ing area when a side window is being closed.

There is a risk of injury.

Observe the complete closing procedure

when the convenience closing feature is oper-

ating. Make sure that no body parts are in

close proximity during the closing procedure.

WARNING

During convenience opening parts of the body

could be drawn in or become trapped

between the side window and window frame.

There is a risk of injury.

Make sure that nobody touches the side win-

dow during the opening procedure. If some-

one becomes trapped, immediately press

the W switch in the door to stop the move-

ment of the side windows. To continue closing

the side window, pull on the W switch.

Convenience closing feature: press and

hold the e button until the side windows

start to close automatically.

The indicator lamp in the e button lights

up. Air-recirculation mode is activated.

If parts of the body are in the closing area during

convenience closing, proceed as follows:

Press the W button to stop the side win-

dows.

The side window stops.

To then open the side window, press the W

button again.

Press and hold the e button again for at

least two seconds.

The side windows move in the opposite direc-

tion.

Convenience opening feature: press and

hold the e button until the side windows

start to open automatically.

The indicator lamp in the e button goes

out. Air-recirculation mode is deactivated.

104

Operating the climate control systems

Climate control

Notes on the automatic reversing feature for the

side windows (Y page 75).

If you open the side windows manually after

closing them with the convenience closing

feature, they will remain in this position when

opened using the convenience opening fea-

ture.

Pre-entry climate control via Smart-

Key

General notes

Before getting in, the vehicle interior can be

briefly warmed or ventilated in advance. In addi-

tion, the air from the air vent can be pre-cooled.

The high-voltage battery must be sufficiently

charged before the "Pre-entry climate control

via key" function can be activated.

Activating/deactivating

When the vehicle is unlocked using the Smart-

Key or KEYLESS-GO, the climate control func-

tions are activated.

The pre-cooling and pre-heating climate control

functions last 5 minutes.

When the vehicle is pre-cooled, the following

functions are activated as necessary:

Climate control system

Cooling with air dehumidification

Blower

When the vehicle is pre-heated, the following

functions are activated as necessary:

Climate control system

Blower

Seat heating

Windshield heating

Rear window defroster

Pre-entry climate control is automatically

switched off when operational readiness mode

is requested.

Activating or deactivating

You can activate and deactivate the pre-entry

climate control (via SmartKey) function using

the on-board computer in the

E-CELLE-CELL submenu

(Y page 164).

If the condition of charge of the high-voltage

battery is below the specified minimum con-

dition of charge, pre-entry climate control will

not be activated even if it has been set.

Pre-entry climate control at departure

time and immediate pre-entry climate

control

Important safety notes

WARNING

If persons, particularly children are subjected

to prolonged exposure to extreme heat or

cold, there is a risk of injury, possibly even

fatal. Never leave children unattended in the

vehicle.

General notes

Using the "Pre-entry climate control at depar-

ture time" function, you can cool or heat the

vehicle interior prior to the desired departure

time.

When using the "Pre-entry climate control at

departure time" function, the condition of

charge of the high-voltage battery must be

higher than the specified minimum condition of

charge.

The running time of the climate control may be

reduced if:

the vehicle is not connected to an electric

power supply

the high-voltage battery is not fully charged

With active "Pre-entry climate control at depar-

ture time" the condition of charge of the high-

voltage battery can be reduced, even if the

charge cable connector is connected.

In certain situations, the desired interior tem-

perature cannot be reached.

When the vehicle is cooled, the following func-

tions are activated as necessary:

Climate control system

Cooling with air dehumidification

Blower

When the vehicle is heated, the following func-

tions are activated as necessary:

Climate control system

Blower

Operating the climate control systems

105

Climate control

Seat heating

Windshield heating

Rear window defroster

"Immediate pre-entry climate control" is auto-

matically switched off when operational readi-

ness mode is requested.

Setting the departure time

You can set a departure time for the "Pre-entry

climate control at departure time". Your vehicle

will then be cooled or heated until the desired

temperature is reached in time for the set depar-

ture time. "Pre-entry climate control at depar-

ture time" will be activated a maximum of

35 minutes before departure. If the departure is

delayed, the vehicle will be heated or cooled for

a further five minutes.

You can set the desired departure time in the E-E-

CELL

CELL submenu on the on-board computer

(Y page 163).

Activating immediate pre-entry climate

control

You can activate "Immediate pre-entry climate

control" even if the vehicle interior is already at

the desired temperature. This means that the

vehicle interior continues to be cooled or

heated, e.g. if the journey is interrupted for up to

50 minutes, and the interior temperature is kept

constant. You can only set the desired temper-

ature using the climate control unit. If you do not

pre-select a temperature, the last temperature

set will be automatically adopted.

To activate/deactivate "Immediate pre-

entry climate control"

Press button : in the center console.

The blue or red indicator lamp in the button

lights up or goes out.

The colors of the indicator lamps in the button

have the following meanings:

RedHeating activated

Blue Cooling activated

Yellow Pre-entry climate control at departure is

preselected

Air vents

Important safety notes

WARNING

Very hot or very cold air can flow from the air

vents. This could result in burns or frostbite in

the immediate vicinity of the air vents. There

is a risk of injury.

Make sure that all vehicle occupants always

maintain a sufficient distance to the air out-

lets. If necessary, redirect the airflow to

another area of the vehicle interior.

In order to ensure the direct flow of fresh air

through the air vents into the vehicle interior,

please observe the following notes:

keep the air inlet between the windshield and

the hood free of blockages, such as ice, snow

or leaves.

never cover the air vents or air intake grilles in

the vehicle interior.

For optimal climate control in the vehicle,

open the air vents completely and set the

adjusters to the central position.

Setting the air vents

Side window defroster vent

;

Side air vent

106

Air vents

Climate control

To open a side air vent: turn the adjuster in

side air vent ; to the left.

To close a side air vent: turn the adjuster in

side air vent ; clockwise as far as it will go.

The center and rear air vents are adjusted in

the same way.

Air vents

107

Climate control

Climate control for Your Mercedes B Class SUV Second Generation (2011-2017)

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