Get Climate control Guide for Mercedes B Class SUV Third Generation (2018-2026)

Overview of climate control systems

Notes on climate control

For the air-conditioning system, pollution level

monitoring and air ltration to function correctly,

an interior air lter must always be used. Make

sure that the lter is installed correctly. Use lters

recommended and approved by Mercedes-Benz.

Always have maintenance work carried out at a

qualied specialist workshop.

Overview of the air conditioning control panel

The indicator lamps on the buttons indicate that

the corresponding functions are activated.

Plug-in hybrid with THERMATIC air conditioning

control panel:

q Sets the temperature

A Calls up the air conditioning menu

H Sets the airow or switches o climate

control

Ã Sets climate control to automatic mode

(/ page 234)

¬ Defrosts the windscreen

¤ Switches the rear window heater on/o

g Switches air-recirculation mode on/o

(/ page 236)

¿ Switches the A/C function on/o

(/ page 234)

& Activates/deactivates "Immediate pre-

entry climate control" (/ page 239)

_ Sets the air distribution

Vehicles with THERMATIC air conditioning control

panel (without stationary heater):

q Sets the temperature

Button inoperative

H Sets the airow or switches o climate

control

Ã Sets climate control to automatic mode

(/ page 234)

¬ Demists the windscreen

¤ Switches the rear window heater on/o

Climate control

231

F247 0072 02

g Switches air-recirculation mode on/o

(/ page 236)

¿ Switches the A/C function on/o

(/ page 234)

Button inoperative

_ Sets the air distribution

Vehicles with THERMATIC air conditioning control

panel (with stationary heater):

q Sets the temperature

A Calls up the air conditioning menu

H Sets the airow or switches o climate

control

Ã Sets climate control to automatic mode

(/ page 234)

¬ Demists the windscreen

¤ Switches the rear window heater on/o

g Switches air-recirculation mode on/o

(/ page 236)

¿ Switches the A/C function on/o

(/ page 234)

& Switches the stationary heater on/o

(/ page 47)

_ Sets the air distribution

Plug-in hybrid with THERMOTRONIC air condition-

ing control panel:

q Sets the temperature on the driver's

side

A Calls up the air conditioning menu

H Sets the airow or switches o climate

control

Ã Sets climate control to automatic mode

(/ page 234)

¬ Demists the windscreen

¤ Switches the rear window heater on/o

g Switches air-recirculation mode on/o

(/ page 236)

Á Switches the A/C function on/o

(/ page 234)

232

Climate control

F247 0072 02

Switches residual heat on/o (/ page 236)

& Activates/deactivates "Immediate pre-

entry climate control" (/ page 239)

q Sets the temperature on the front

passenger side

Vehicles with THERMOTRONIC air conditioning

control panel (without stationary heater):

q Sets the temperature on the driver's

side

_ Sets the air distribution

H Sets the airow or switches o climate

control

Ã Sets climate control to automatic mode

(/ page 234)

¬ Demists the windscreen

¤ Switches the rear window heater on/o

g Switches air-recirculation mode on/o

(/ page 236)

Á Switches the A/C function on/o

(/ page 234)

Switches residual heat on/o (/ page 236)

0 Switches synchronisation on/o

(/ page 235)

q Sets the temperature on the front

passenger side

Vehicles with THERMOTRONIC air conditioning

control panel (with stationary heater):

q Sets the temperature on the driver's

side

A Calls up the air conditioning menu

H Sets the airow or switches o climate

control

Ã Sets climate control to automatic mode

(/ page 234)

¬ Demists the windscreen

¤ Switches the rear window heater on/o

g Switches air-recirculation mode on/o

(/ page 236)

Á Switches the A/C function on/o

(/ page 234)

Climate control

233

F247 0072 02

Switches residual heat on/o (/ page 236)

& Switches the stationary heater on/o

(/ page 47)

q Sets the temperature on the front

passenger side

Residual heat can be used only in vehicles

with a diesel engine or vehicles with a station-

ary heater in combination with the

THERMOTRONIC air conditioning control

panel.

Operating the climate control system

Switching climate control on/o

To switch on: set the airow to level 1 or

higher using the H button.

To switch o: set the airow to level 0 using

the H button.

If climate control is switched o, the windows

may mist up more quickly. Switch climate control

o only briey.

Switching the A/C function on/o using the air

conditioning control panel

The A/C function heats, cools and dehumidies

the vehicle's interior air.

Press the ¿/Á button.

Switch o the A/C function only briey; other-

wise, the windows may mist up more quickly.

Condensation may drip from the underside of the

vehicle when cooling mode is active. This is not

indicative of a fault.

Calling up the air conditioning menu via the cli-

mate bar or the air conditioning control panel

The air conditioning menu can be called up via the

climate bar. The climate bar is always shown on

the lower edge of the media display.

Select the Climate menu entry in the air con-

ditioning bar.

Activating/deactivating the A/C function via the

air conditioning menu

Multimedia system:

Climate menu

First row of seats

Depending on the external conditions, support for

improved cooling and dehumidication of the inte-

rior air will be provided when the A/C function is

activated. If it is not possible to operate the A/C

function on the climate bar on the central display,

switch the function on or o in the climate menu

of the central display.

Select A/C (A/C).

Switch o the A/C function only briey; other-

wise, the windows may mist up more quickly.

Condensation may drip from the underside of the

vehicle when cooling mode is active. This is not

indicative of a fault.

Setting climate control to automatic mode

In automatic mode, the set temperature is con-

trolled and maintained at a constant level by the

air supply.

234

Climate control

F247 0072 02

Press button Ã.

To switch to manual mode: press the _ or

Ã button.

In automatic mode, you can choose between ve

dierent air quantities using the H button.

Automatic mode is retained.

Overview of the air distribution settings

The symbols on the display indicate which vents

the airow is being directed through:

Demister and side air vents

Centre and side air vents

Footwell and side air vents

Centre, side and footwell vents

Demister, footwell and side air vents

All vents

Demister, centre and side air vents

Automatic air distribution

Setting air distribution via the air conditioning

Multimedia system:

Climate menu

Select First row of seats or Second row of

seats

To set air distribution: select ¯, P or

Set the airow.

When the air conditioning system is switched

on, at least one zone is always active. How-

ever, several air distribution options can be

selected at the same time, for example to set

the climate control for the vehicle interior and

the footwells simultaneously. The ¯ cli-

mate control for the windscreen can only be

selected for the rst seat row. When auto-

matic mode is active, the buttons for setting

the air distribution are deactivated automati-

cally. If the air conditioning system is deacti-

vated, the buttons remain operable and the

last setting is saved.

Switching the synchronisation function on/o via

the air conditioning control panel

Requirements

The vehicle is not equipped with a stationary

heater.

Climate control can be set centrally using the syn-

chronisation function. The temperature and air

distribution settings for the driver's side will be

adopted automatically for the front passenger

side.

Press the 0 button.

The synchronisation function will switch o if the

settings for one of the other climate zones are

changed.

Switching the synchronisation function on/o via

the air conditioning menu

Multimedia system:

Climate menu

First row of seats

The synchronisation function controls the climate

control centrally. The driver's settings for temper-

Climate control

235

F247 0072 02

ature, airow and air distribution are automatically

adopted for each climate zone.

Select SYNC (SYNC).

Demisting the windows

Windows misted up on the inside

Press the Ã button.

If the windows remain misted up: press

the ¬ button.

Windows misted up on the outside

Switch on the windscreen wipers.

Press the Ã button.

Switching air-recirculation mode on/o

Press the g button.

The interior air will be recirculated.

Air-recirculation mode automatically switches to

fresh air mode aer a while.

If air-recirculation mode is switched on, the

windows may mist up more quickly. Switch on

air-recirculation mode only briey.

Switches residual heat on/o

Requirements

The vehicle is parked.

Residual heat can be used only in vehicles

with a diesel engine or vehicles with a station-

ary heater in combination with the

THERMOTRONIC air conditioning control

panel.

It is possible to make use of the residual heat

from the engine to continue heating or ventilating

the front compartment of the vehicle for approx-

imately 30 minutes, depending on the tempera-

ture set.

To activate: press the Á button.

Residual heat will be switched o automatically.

Pre-entry climate control via the key (plug-in

hybrid)

▌Function of pre-entry climate control via the

key (plug-in hybrid)

Before entering the vehicle, the driver's side or

the whole vehicle interior can be briey pre-

warmed or pre-cooled.

When pre-cooling, the following functions are acti-

vated as needed:

Automatic climate control

Blower

When pre-heating, the following functions are acti-

vated as needed:

Automatic climate control

Blower

Seat heating

Steering wheel heater

Mirror heater

Rear window heater

236

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F247 0072 02

▌Setting pre-entry climate control when the vehi-

cle is unlocked in the multimedia system

Multimedia system:

Climate menu

Pre-entry climate ctrl

Activate or deactivate the function.

Selecting seats

Select Driver, Passenger, Rear left or Rear

right

The seat-specic functions of pre-entry cli-

mate control (e.g. seat heating) will be per-

formed for the selected seats.

When pre-entry climate control is enabled, an LED

on the climate bar of the media display will light

up blue for a cooled vehicle and red for a heated

vehicle.

▌Activating/deactivating pre-entry climate con-

trol via the key (plug-in hybrid)

Requirements:

The high-voltage battery is charged su-

ciently.

The function has been activated via the multi-

media system.

To switch on: unlock the vehicle.

The climate control functions are activated for

up to ve minutes for pre-heating and pre-

cooling.

Pre-entry climate control via the key cannot be

activated more than twice when the vehicle is

switched o.

To switch o: push the & button up or

down.

The following functions will remain active once the

vehicle has been started:

Seat heating

Pre-entry climate control for departure time (plug-

in hybrid)

▌Function of pre-entry climate control for depar-

ture time (plug-in hybrid)

WARNING Risk of fatal injury due to expo-

sure to extreme heat or cold in the vehicle

If persons, particularly children, are subjected

to prolonged exposure to intense heat or cold,

there is a risk of severe injury or even death.

Never leave persons, particularly chil-

dren, unattended in the vehicle.

The vehicle interior can be air conditioned when

the vehicle is parked.

When the vehicle is connected to power supply

equipment, priority is given to charging the high-

voltage battery to a specied minimum charge.

The running time of pre-entry climate control may

be reduced under the following conditions:

The vehicle is not connected to power supply

equipment.

Climate control

237

F247 0072 02

The high-voltage battery is not charged su-

ciently.

With active pre-entry climate control, the charge

level of the high-voltage battery may be reduced,

even if the charging cable connector is connec-

ted.

For cooling, the following functions are activated

as needed:

Automatic climate control

Blower

For heating, the following functions are activated

as needed:

Automatic climate control

Blower

Seat heating

Steering wheel heater

Mirror heater

Rear window heater

▌Setting pre-entry climate control for departure

time via the multimedia system

Multimedia system:

Climate menu

Pre-entry climate ctrl

Setting the departure time

Select Edit departure time ´ .

Select a departure time or set a new depar-

ture time.

Setting the repeat days

Select Edit departure time ´ .

Set the desired departure time and select the

corresponding weekdays on which this depar-

ture time is to apply.

Press OK to conrm.

Selecting seats

Select Driver, Passenger, Rear left or Rear

right

Pre-entry climate control will take place for

the selected seats.

▌Activating/deactivating pre-entry climate con-

trol for departure time (plug-in hybrid)

WARNING Risk of fatal injury due to expo-

sure to extreme heat or cold in the vehicle

If persons, particularly children, are subjected

to prolonged exposure to intense heat or cold,

there is a risk of severe injury or even death.

Never leave persons, particularly chil-

dren, unattended in the vehicle.

Requirements:

The high-voltage battery is charged su-

ciently.

The function has been activated via the multi-

media system.

To activate: set the departure time

(/ page 238).

Pre-entry climate control for departure time

will switch on a maximum of 55 minutes

before the selected departure time. It will

remain active for another ve minutes if depar-

ture is delayed.

238

Climate control

F247 0072 02

To deactivate: press the & button up or

down.

The following functions will remain active once the

vehicle has been started:

Seat heating

Activating/deactivating immediate pre-entry cli-

mate control

WARNING Risk of fatal injury due to expo-

sure to extreme heat or cold in the vehicle

If persons, particularly children, are subjected

to prolonged exposure to intense heat or cold,

there is a risk of severe injury or even death.

Never leave persons, particularly chil-

dren, unattended in the vehicle.

Air conditioning of the vehicle interior can con-

tinue for up to 50 minutes, e.g. if the journey is

interrupted.

The colours of the indicator lamp have the follow-

ing meanings:

Blue: cooling is activated.

Red: heating is activated.

Yellow: the departure time has been preselec-

ted.

Set the desired temperature using the w

button.

Press button 1 .

The red or blue indicator lamp on button

will light up or go out.

Stationary heater/ventilation

▌Stationary heater/ventilation function

The following function is equipment-depend-

ent.

The air inside the vehicle is heated or ventila-

ted to the set temperature.

The air inside the vehicle cannot be cooled

down to temperatures below the outside tem-

perature.

If the outside temperature changes, ventilation

mode will automatically switch to heating

mode or heating mode will automatically

switch to ventilation mode.

The stationary heater and the exhaust gas outlet

are situated in front of the right front wheel.

Climate control

239

F247 0072 02

▌Switching the stationary heater/ventilation

on/o via the operating unit

DANGER Risk of fatal injury due to poison-

ous exhaust gases

If the tailpipe is blocked or sucient ventila-

tion is not possible, poisonous exhaust gases

such as carbon monoxide may enter the vehi-

cle. This is the case in enclosed spaces or if

the vehicle gets stuck in snow, for example.

Always switch the stationary heater o in

enclosed spaces without an air extrac-

tion system, e.g. in garages.

Keep the tailpipe and the area around

the vehicle free from snow when the

engine or the stationary heater is run-

ning.

Open a window on the side of the vehicle

facing away from the wind to ensure an

adequate supply of fresh air.

WARNING Risk of re due to hot station-

ary heater components and exhaust gases

Flammable materials such as leaves, grass or

twigs may ignite.

When the stationary heater is switched

on, make sure that:

hot vehicle parts do not come into

contact with ammable materials.

the exhaust gas can ow out of the

stationary heater exhaust pipe unhin-

dered.

the exhaust gas does not come into

contact with ammable materials.

NOTE Battery discharge caused by sta-

tionary heater or stationary ventilation

operation

Operating the stationary heater or stationary

ventilation drains the battery.

Aer heating or ventilating the vehicle

twice, drive for a longer period of time.

Requirements

The fuel tank is at least Õ full.

Set the desired temperature using the w

button.

Press button 1.

The red or blue indicator lamp on button

will light up or go out.

240

Climate control

F247 0072 02

The colours of the indicator lamp have the follow-

ing meanings:

Blue: stationary ventilation is switched on.

Red: the stationary heater is switched on.

Yellow: the departure time is preselected.

The stationary heater/ventilation will switch o

automatically aer 50 minutes.

▌Setting the stationary heater/ventilation via the

multimedia system

Requirements

The vehicle is tted with the stationary heater

equipment.

Multimedia system:

Climate menu

Stationary heater

Selecting the departure time

Select Time A, Time B or Time C.

Setting the departure time

Select Time A, Time B or Time C.

Select the pen beside the time.

Set a time.

Air vents

▌Adjusting the front air vents

WARNING Risk of burns or frostbite due to

being too close to the air vents

Very hot or very cold air can ow from the air

vents.

Make sure that all vehicle occupants

always maintain a sucient distance

from the air vents.

If necessary, direct the airow to another

area of the vehicle interior.

To guarantee the ow of fresh air through the air

vents into the vehicle interior, note the following:

Always keep the vents and ventilation grilles in

the vehicle interior clear.

Keep the air inlet free of residue build-up

(/ page 554).

To open or close: hold the centre of air

vent 1 and turn it to the le (open) or right

(closed) as far as it will go.

To set the airow direction: hold the centre of

air vent 1 and move it up or down or to the

le or right.

▌Adjusting the rear air vents

WARNING Risk of burns or frostbite due to

being too close to the air vents

Very hot or very cold air can ow from the air

vents.

Climate control

241

F247 0072 02

Make sure that all vehicle occupants

always maintain a sucient distance

from the air vents.

If necessary, direct the airow to another

area of the vehicle interior.

To open or close: hold the centre of air

vent 1 and turn it to the le or right as far as

it will go.

To set the airow direction: hold the centre of

air vent 1 and move it up or down or to the

le or right.

242

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F247 0072 02

Climate control for Your Mercedes B Class SUV Third Generation (2018-2026)

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