2015 MERCEDES-BENZ S-Class lock

Setting the rear compartment airflow
using the front control panel X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 189).
X Press the top or bottom section of the t
rocker switch.
The COMAND climate control menu opens.
X Select "Rear adjustment" in the air-condi-
tioning setting bar (see the separate
COMAND operating instructions).
You can control the rear-compartment cli-
mate control using the front control panel
or COMAND.
X To increase/reduce: press theK
rocker switch on the front control panel up or down.
or
X Set the airflow using COMAND (see the
separate operating instructions).
Setting the rear compartment airflow
using the rear control panel X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 189).
X To increase/reduce: press rocker switch
K up or down (Y page 165). Switching the synchronization func-
tion on/off
Climate control can be set centrally using the synchronization function. The settings for
temperature, air distribution and airflow on
the driver's side are adopted for the front-
passenger side and the rear compartment
(vehicles with rear-compartment air condi-
tioning).
X To activate/deactivate: switch the syn-
chronization function on or off using COMAND (see the separate operating
instructions).
Vehicles with rear-compartment air condi-
tioning: the
SYNC SYNCdisplay appears on the
rear-compartment display.
The synchronization function is deactivated:
R if the settings for the front-passenger side
are changed
R vehicles with rear-compartment air condi-
tioning: the settings for the rear compart-
ment are changed Defrosting the windshield
You can use this function to defrost the wind-
shield or to clear a fogged up windshield or
front side windows on the inside.
Switch off the "Windshield defrosting" func-
tion as soon as the windshield is clear again.
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 189).
X To activate: press the¬rocker switch
on the front control unit up or down.
The indicator lamp in the ¬rocker
switch lights up.
The climate control system switches to the
following functions:
R high airflow
R high temperature
R air distribution to the windshield and
front side windows
R air-recirculation mode off
R windshield heating on
X To deactivate: press the¬rocker
switch up or down.
The indicator lamp in the ¬rocker
switch goes out. The previously selected
settings are restored. Air-recirculation
mode remains deactivated.
or
X Press the Ãrocker switch up or down. Operating the climate control systems
175Climate control

or
X Use the trocker switch to call up the
COMAND climate control menu. Defrosting the windows
Windows fogged up on the inside X
Activate the "Cooling with air dehumidifi-
cation" function with the Árocker
switch.
or X Activate the "Cooling with air dehumidifi-
cation" function via COMAND (see the sep- arate operating instructions).
X Switch on automatic mode using the Ã
rocker switch.
X If the windows continue to fog up, activate
the "Windshield defrosting" function using
the ¬ rocker switch. The windshield
heating is switched on.
i You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside X
Activate the windshield wipers.
X Switch on automatic mode using the Ã
rocker switch.
i If you clean the windows regularly, they
do not fog up so quickly. 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 auto-
matically after several minutes.
If the battery voltage is too low, the rear win-
dow defroster may switch off. Activating/deactivating X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 189).
X Press the ¤rocker switch up or down.
The indicator lamp in the ¤rocker
switch lights up or goes out. 176
Operating the climate control systemsClimate control

Problems with the rear window defroster
Problem
Possible causes/consequences and
M
MSolutions The rear window
defroster has deactiva-
ted prematurely or can-
not be activated. The battery has not been sufficiently charged.
X 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. Activating/deactivating air-recircula-
tion mode
General notes You can also temporarily deactivate the flow
of fresh air manually if unpleasant odors are
entering the vehicle from outside. The air
already inside the vehicle will then be recir-
culated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
Activating/deactivating X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 189).
X To activate: press thegrocker switch
up or down.
The indicator lamp in the grocker
switch lights up.
Air-recirculation mode is automatically acti-
vated at high levels of pollution or at high out- side temperatures. The indicator lamp in the
g rocker switch is not lit when automatic
air-recirculation mode is activated. Outside
air is added after about 30 minutes.
X To deactivate: press thegrocker
switch up or down.
The indicator lamp in the grocker
switch goes out. Air-recirculation mode deactivates automati-
cally:
R after approximately five minutes at outside
temperatures below approximately 41 ‡
(5 †)
R after approximately five minutes if cooling
with air dehumidification is deactivated
R after approximately 30 minutes at outside
temperatures above approximately 41 ‡
(5 †) if the "Cooling with air dehumidifica-
tion" function is activated Activating/deactivating the residual
heat function
General notes Vehicles with rear-compartment climate
control:
once the engine is switched off, it is
possible to make use of the residual heat of
the engine to continue heating or ventilating
the rear and front compartment of the vehicle
for approximately 15 minutes. If the "Residual
heat" function is set for only the front or only
the rear compartment, it is possible to con-
tinue heating or ventilating for approximately
30 minutes.
Vehicles without rear-compartment cli-
mate control: once the engine is switched
off, it is possible to make use of the residual
heat of the engine to continue heating or ven- tilating the front compartment of the vehicle
for approximately 30 minutes.
The heating or ventilation time depends on
the temperature that has been set. Operating the climate control systems
177Climate control

Front control panel
X
Turn the SmartKey to position 0in the igni-
tion lock or remove it (Y page 189).
X To activate: press theÁrocker switch
up or down.
The indicator lamp in the Árocker
switch lights up.
The blower will run at a low speed regardless
of the airflow setting.
If you activate the residual heat function at
high temperatures, only the ventilation will be activated. The blower runs at medium speed.
X To deactivate: press theÁrocker
switch up or down.
The indicator lamp in the Árocker
switch goes out.
Rear control panel X
Turn the SmartKey to position 0in the igni-
tion lock or remove it (Y page 189).
REST appears in the rear compartment dis-
play.
X To activate: press rocker switch Lup or
down (Y page 165).
The indicator lamp in rocker switch L
lights up.
X To deactivate: press rocker switch Lup
or down (Y page 165).
The indicator lamp in rocker switch Lgoes
out. REST goes out on the rear compart-
ment display.
i If you do not activate the residual heat
function, REST goes out automatically after
five minutes on the rear compartment dis-
play.
Residual heat is deactivated automatically:
R after approximately 30 minute sif the resid-
ual heat function is activated in the front or
rear compartment
R after approximately 15 minutes if the resid-
ual heat function is activated in the front
and rear compartments R
when the ignition is switched on
R if the battery voltage drops perfume atomizer
Operating the perfume atomizer G
WARNING
If children open the perfume vial, they could
drink the perfume or it could come into con-
tact with their eyes. There is a risk of injury. Do not leave children unsupervised in the vehicle.
If the perfume liquid has been drunk, consult
a doctor. If perfume comes into contact with
your eyes or skin, rinse the eyes with clean
water. If you continue to experience difficul-
ties, consult a doctor. H
Environmental note Full perfume vials must not
be disposed of with house-
hold rubbish. They must be
collected separately and
recycled to protect the envi-
ronment.
Dispose of full perfume vials
in an environmentally
responsible manner and
take them to a special waste
collection point. :
Perfume lid
; Perfume vial
The perfume atomizer helps to improve driv-
ing comfort. 178
Operating the climate control systemsClimate control

Activating the perfume atomizer/ionization
(see separate COMAND operating instruc-
tions).
Activating/deactivating "Pre-entry cli-
mate control via SmartKey" Before "Pre-entry climate control via Smart-
Key" can be switched on, you must activate
the function via COMAND (see separate oper-
ating instructions).
The function may also be activated via the
"Vehicle Homepage" (Y page 220).
X To activate pre-entry climate control
via SmartKey: unlock the vehicle with the
SmartKey or KEYLESS-GO.
The climate control functions are activated
for up to 5 minutes for pre-heating and pre- cooling.
To deactivate "Pre-entry climate control
via SmartKey": "Pre-entry climate control
via SmartKey" switches off automatically
when the engine is started.
The following functions remain active after
the engine is started:
R seat heating (heating)
R seat ventilation (ventilation)
R armrest heating
R perfume atomizer
R Ionization
An activated "Pre-entry climate control via
SmartKey" function can be deactivated using the rocker switch (Y page 183). Operating the climate control systems
181Climate control Z

The colors of the indicator lamps in the rocker
switch have the following meanings:
R blue: cooling activated
R red: heating activated
R yellow: departure time preselected
X To activate/deactivate "Immediate pre-
entry climate control" : press rocker
switch :up or down.
The blue or red indicator lamp above the
rocker switch lights up or goes out. Setting the air vents
Important safety notes
G
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:
R keep the air inlet between the windshield
and the hood free of blockages, such as ice, snow or leaves.
R never cover the air vents or air intake grilles
in the vehicle interior. Setting the center air vents
:
Fixed center air vent
; Center air vent, right
= Center vent control, right
? Center vent control, left
A Center air vent, left
X To open/close: press control=or?.
The control pops out.
X Turn control =or? counter-clockwise or
clockwise.
X To adjust the air direction: hold rear air
vent ;orA by the middle fin and move up
or down or to the left or right. Setting the side air vents
:
Side window defroster vent
; Side air vent
= Thumbwheel for left side air vent 184
Setting the air ventsClimate control

X
To open/close: press control=.
The control pops out.
X Turn control =counter-clockwise or
clockwise.
X To adjust the air direction: hold side air
vent ;by the middle fin and move it up or
down or to the left or right. Setting the glove box air vent
! Close the air vent when heating the vehi-
cle.
At high outside temperatures, open the air
vent and activate the "cooling with air dehu- midification" function. Otherwise, temper-
ature-sensitive items stored in the glove
box could be damaged.
When the climate control system is activated, the glove box can be ventilated, for instance
to cool its contents. The level of airflow
depends on the airflow and air distribution
settings. :
Air vent thumbwheel
; Air vent
X To open/close: turn thumbwheel :to the
left or right. Setting the rear-compartment air
vents
Setting the center vents in the rear com-
partment :
Rear-compartment air vent, left
; Rear-compartment air vent, right
= Rear-compartment air vent control, right
? Rear control panel
A Rear-compartment air vent control, left
Vehicles with rear-compartment climate con-
trol
X To open/close: press control=orA.
The control pops out.
X Turn control =orA counter-clockwise or
clockwise.
X To adjust the air direction: hold the rear
air vent :or; by the middle fin and move
up or down or to the left or right. Setting the air vents
185Climate control Z

Vehicles without rear-compartment climate
control (only Sedans and vehicles with an
extended wheelbase):
X To open/close: press control=.
The control pops out.
X Turn control =counter-clockwise or
clockwise.
X To adjust the air direction: hold rear air
vent :or; by the middle fin and move up
or down or to the left or right.
Setting the B-pillar air vent X
To open/close: turn thumbwheel ;to the
left or right.
X To adjust the air direction: hold B-pillar
air vent :by the middle fin handle and
move up or down or to the left or right. 186
Setting the air ventsClimate control