cooling MERCEDES-BENZ GLK-Class 2012 X204 Owner's Manual

1, 2, 3 ...
115 V socket ...................................... 224
12 V socket see Sockets
4ETS
see ETS/4ETS (Electronic
Traction System)
4MATIC (permanent four-wheel
drive) .................................................. 153
A
ABS (Anti-lock Braking System) Display message ............................ 180
Function/notes ................................ 62
Important safety notes ....................62
Warning lamp ................................. 202
Activating/deactivating cooling
with air dehumidification ................. 121
Active light function ......................... 106
Active Light System Display message ............................ 191
Active service system PLUS
see ASSYST PLUS service interval
display
Additives (engine oil) ........................ 306
Air bags Display message ............................ 187
Front air bag (driver, front
passenger) ....................................... 41
Important safety notes ....................40
Knee bag .......................................... 42
PASSENGER AIRBAG OFF
indicator lamp .................................. 44
Pelvis air bag ................................... 43
Safety guidelines ............................. 39
Side impact air bag ..........................42
Window curtain air bag ....................44
Air-conditioning system
see Climate control
Air pressure
see Tire pressure
Air vents
Glove box ....................................... 126
Important safety notes ..................125
Rear ............................................... 126
Setting ........................................... 125
Setting the center air vents ...........126
Setting the side air vents ...............126
Alarm system
see ATA (Anti-Theft Alarm system)
Anti-lock Braking System
see ABS (Anti-lock Braking System)
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Anti-theft system
ATA (Anti-Theft Alarm system) .........65
Approach/departure angle .............. 150
Ashtray ............................................... 222
ASSYST PLUS see ASSYST PLUS service interval
display
ATA (Anti-Theft Alarm system)
Activating/deactivating ...................65
Function ........................................... 65
Switching off the alarm ....................65
Audio menu (on-board computer) .... 172
Audio system see separate operating instructions
Authorized Mercedes-Benz Center
see Qualified specialist workshop
AUTO lights
Display message ............................ 191
see Lights
Automatic headlamp mode .............. 104
Automatic transmission Automatic drive program ...............138
Changing gear ............................... 137
Display message ............................ 197
Driving tips .................................... 137
Emergency running mode ..............140
Kickdown ....................................... 137
Problem (malfunction) ...................140
Program selector button ................137
Pulling away ................................... 133
Releasing the parking lock
manually ........................................ 140
Selector lever ................................ 135
Shift ranges ................................... 138
Starting the engine ........................132
Trailer towing ................................. 137
Transmission position display ........136
Transmission positions ..................1364Index

Cargo netAttaching ....................................... 218
Important safety information .........217
Cargo tie down rings ......................... 215
Car wash (care) ................................. 244
CD player/CD changer (on-board
computer) .......................................... 173
Cell phone see Mobile phone
Center console
Lower section .................................. 33
Upper section .................................. 32
Central locking
Automatic locking (on-board
computer) ...................................... 177
Locking/unlocking (SmartKey) ........68
Changing bulbs
Brake lamps ................................... 113
High-beam headlamps ...................111
Important safety notes ..................108
License plate lighting .....................113
Low-beam headlamps ....................110
Overview of bulb types ..................109
Parking lamps ................................ 111
Rear fog lamp ................................ 113
Reversing lamps ............................ 113
Side marker lamps (front) ..............112
Standing lamps (front) ...................111
Tail lamps ...................................... 113
Turn signals (front) ......................... 112
Turn signals (rear) ..........................113
Child-proof locks
Important safety notes ....................59
Rear doors ....................................... 60
Children
In the vehicle ................................... 55
Restraint systems ............................ 55
Child seat
LATCH-type (ISOFIX) child seat
anchors ............................................ 58
Special seat belt retractor ...............57
Top Tether ....................................... 58
Cigarette lighter ................................ 222
Cleaning Trailer tow hitch ............................. 247Climate control
Automatic climate control (3-
zone) .............................................. 120
Controlling automatically ...............122
Cooling with air dehumidification ..121
Defrosting the windows .................124
Defrosting the windshield ..............123
Dual-zone automatic climate
control ........................................... 119
Important safety notes ..................118
Indicator lamp ................................ 122
Maximum cooling .......................... 123
Overview of systems ......................118
Problems with cooling with air
dehumidification ............................ 122
Problem with the rear window
defroster ........................................ 124
Rear control panel .........................120
Refrigerant ..................................... 306
Setting the air distribution .............122
Setting the airflow .........................123
Setting the air vents ......................125
Setting the temperature ................122
Switching air-recirculation mode
on/off ............................................ 124
Switching on/off ........................... 121
Switching residual heat on/off ......125
Switching the MONO function on/
off .................................................. 123
Switching the rear window
heating on/off ............................... 124
Clock (on-board computer) ............... 176
Coat hooks ......................................... 218
Cockpit Overview .......................................... 28
see Instrument cluster
Collapsible spare wheel
Inflating ......................................... 257
see Emergency spare wheel
COMAND
see separate operating instructions
Combination switch .......................... 105
Compass Calibrating ..................................... 236
Calling up ....................................... 235
Setting ........................................... 235
Consumption statistics (on-board
computer) .......................................... 1706Index

Convenience closing feature .............. 83
Convenience opening feature ............ 83
Coolant (engine) Checking the level .........................240
Display message ............................ 191
Notes ............................................. 307
Temperature gauge ........................ 166
Warning lamp ................................. 207
Cooling
see Climate control
Cornering light function
Display message ............................ 188
Function/notes ............................. 106
Crash-responsive emergency
lighting ............................................... 108
Cruise control Cruise control lever .......................151
Deactivating ................................... 153
Display message ............................ 194
Driving system ............................... 151
Function/notes ............................. 151
Important safety notes ..................151
LIM indicator lamp .........................151
Setting a speed .............................. 152
Storing and maintaining current
speed ............................................. 152
Cup holder
Center console .............................. 220
Important safety notes ..................220
Rear compartment .........................221
Customer Assistance Center (CAC) ... 24
Customer Relations Department ....... 24
D
Dashboard see Cockpit
Data
see Technical data
Date (on-board computer) ................ 176
Daytime running lamp mode see Daytime running lamps
Daytime running lamps
Display message ............................ 191
Switching on/off (on-board
computer) ...................................... 176
Switching on/off (switch) ..............103
Delayed switch-off
Exterior lighting (on-board
computer) ...................................... 176
Interior lighting .............................. 177
Digital speedometer ......................... 170
Display (cleaning instructions) ........ 248
Display messages Calling up (on-board computer) .....179
Driving systems ............................. 194
Engine ............................................ 191
General notes ................................ 179
Hiding (on-board computer) ...........179
KEYLESS-GO .................................. 198
Lights ............................................. 188
Safety systems .............................. 180
Service interval display ..................242
SmartKey ....................................... 198
Tires ............................................... 194
Vehicle ........................................... 197
Distance recorder ............................. 170
see Odometer
see Trip odometer
Doors
Automatic locking (on-board
computer) ...................................... 177
Automatic locking (switch) ............... 76
Central locking/unlocking
(SmartKey) ....................................... 68
Control panel ................................... 35
Display message ............................ 197
Emergency locking ........................... 77
Emergency unlocking .......................77
Important safety notes ....................75
Opening (from inside) ......................76
Downhill Speed Regulation
see DSR (Downhill Speed Regulation)
Drinking and driving ......................... 145
Drinks holder see Cup holder
Drive program
Automatic ...................................... 138
Display ........................................... 136
Driver's door
see Doors
Driver's seat
see Seats Index7

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Please read the information on qualified
specialist workshops ( Y page 23).
Overview of climate control systems
Important safety notes
GWARNING
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before
its scheduled replacement interval. A clogged
filter will reduce the air volume to the interior
and the windows could fog up, impairing
visibility and endangering you and others.
Have a blocked filter replaced at a Mercedes-
Benz Center as soon as possible.
GWARNING
Follow the recommended settings for heating
and cooling given on the following pages.
Otherwise, the windows could fog up,
impairing visibility and endangering you and
others.
Automatic climate control controls the
temperature and the humidity in the vehicle
interior and filters undesirable substances
from the air.
Automatic climate control is only operational
when the engine is running. Optimum
operation is only achieved if you drive with the
side windows and panorama roof with power
tilt/sliding panel closed.
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the
convenience opening feature ( Y page 83).
This will speed up the cooling process and
the desired vehicle interior temperature
will be reached more quickly.
i The integrated filter can filter out most
particles of dust and completely filters out
pollen. 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 Service Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Service Booklet.
i It is possible that the residual heat
function may be activated automatically an
hour after the SmartKey is removed. The
vehicle is then ventilated for 30 minutes to
dry the air-conditioning system.118Overview of climate control systemsClimate control

Control panel for dual-zone automatic climate control:To set the temperature, left (Y page 122);To set climate control to automatic ( Y page 122)=To switch climate control on/off ( Y page 121)?To switch the MONO function on/off 14
(Y page 123)To switch maximum cooling MAX COOL on/off 15
(Y page 123)ATo activate/deactivate cooling with air dehumidification ( Y page 121)BTo defrost the windshield ( Y page 123)CTo activate/deactivate air-recirculation mode ( Y page 124)DTo set the temperature, right ( Y page 122)ETo switch the rear window defroster on/off ( Y page 124)FTo increase the airflow ( Y page 123)GTo reduce the airflow ( Y page 123)HDisplayITo set the air distribution ( Y page 122)14
Canada only.
15 USA only.Overview of climate control systems119Climate controlZ

Control panel for 3-zone automatic climate controlFront control panel:Sets the temperature, left (Y page 122);Sets climate control to automatic mode ( Y page 122)=Switches climate control on/off ( Y page 121)?Activates/deactivates the MONO function ( Y page 123)AActivates/deactivates cooling with air dehumidification ( Y page 121)BActivates/deactivates the residual heat function ( Y page 125)CDefrosts the windshield ( Y page 123)DSets the temperature, right ( Y page 122)ESwitches the rear window defroster on/off ( Y page 124)FSets the air distribution, right ( Y page 122)GIncreases the airflow ( Y page 123)HReduces the airflow ( Y page 123)IDisplayJSets the air distribution, left ( Y page 122)KActivates/deactivates air-recirculation mode ( Y page 124) Rear control panelLIncreases the temperature ( Y page 122)MDisplayNIncreases the airflow ( Y page 123)120Overview of climate control systemsClimate control

OReduces the airflow (Y page 123)PReduces the temperature ( Y page 122)Operating the climate control system
Activating/deactivating climate
control
Important information
GWARNING
When the climate control system is
deactivated, the outside air supply and
circulation are also deactivated. Only choose
this setting for a short time. Otherwise the
windows could fog up, impairing visibility and
endangering you and others.
i Switch on climate control primarily using
the à button ( Y page 122).
Activating/deactivating
XTurn the SmartKey to position 2 in the
ignition lock.XTo switch on: press the à button.
The indicator lamp in the à button lights
up. Airflow and air distribution are set to
automatic mode.
or
XPress the ^ button.
The indicator lamp in the ^ button goes
out. The previously selected settings come
into effect again.XTo switch off: press the ^ button.
The indicator lamp in the ^ button lights
up.
Activating/deactivating cooling with
the air dehumidification function
Important information
The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.GWARNING
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
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
malfunction.
i The cooling with air dehumidification
function uses refrigerant R134a. This
coolant does not contain
chlorofluorocarbons, and therefore does
not damage the ozone layer.
Activating/deactivating
i The evaporator is ventilated when the air-
conditioning system is operated. The
blower is activated automatically
approximately one hour after the vehicle
has been locked. The blower operates on
the lowest level for 30 minutes. The noise
from the blower is normal and is not an
indication of a malfunction. If you unlock
the vehicle during this time, the ventilation
is interrupted. To conserve battery life, the
evaporator is not ventilated automatically
if the starter battery is weak.
XTo activate: press the ¿ button.
The indicator lamp in the ¿ button lights
up.XTo switch off: press the ¿ button.
The indicator lamp in the ¿ button goes
out. The cooling with air dehumidification
function has a delayed switch-off feature.Operating the climate control system121Climate controlZ

Problems with the cooling with air
dehumidification function
When you press the ¿ button, the
indicator lamp in the button flashes three
times or remains off. You can no longer switch
on the cooling with air dehumidification
function.
XConsult a qualified specialist workshop.
Setting climate control to automatic
GWARNING
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the
temperature of the dispensed air, the airflow
and the air distribution.
Automatic mode will achieve optimal
operation if cooling with air dehumidification
is also activated. If desired, cooling with air
dehumidification can be deactivated.
XTurn the SmartKey to position 2 in the
ignition lock.XSet the desired temperature.XTo activate: press the à button.
The indicator lamp in the à button lights
up. Automatic air distribution and airflow
are activated.XTo switch off: press the _ button.
or
XPress the K or I button.
The indicator lamp in the à button goes
out. Automatic air distribution and airflow
are deactivated.Setting the temperature
Different temperatures can be set for the
driver's and front-passenger sides.XTurn the SmartKey to position 2 in the
ignition lock.XTo increase/reduce: turn controls : and
D clockwise or counter-clockwise
( Y page 119). Only change the temperature
setting in small increments. Start at
72 ‡ (22 †).
Setting the air distribution
Air distribution settings
Dual-zone climate control: the air distribution
can be set individually for the driver's and
front-passenger sides.
¯Directs air through the defroster ventsPDirects air through the center and side
air ventsODirects the airflow through the
footwell air ventsSDirects the airflow through the center,
side and footwell air vents 16_Directs the airflow to the entire vehicle
interior 17bDirects the airflow through the
defroster, center and side air vents. 17aDirects air through the defroster and
footwell vents
i Regardless of the air distribution setting,
airflow is always directed through the side
air vents.. The side air vents can only be
closed when the controls on the side air
vents are turned downwards.
16 USA only.
17 Canada only.122Operating the climate control systemClimate control

XTurn the SmartKey to position 2 in the
ignition lock.XPress the _ button repeatedly until the
desired symbol appears in the display.
The indicator lamp in the à button goes
out. Automatic control is deactivated and
the air distribution is controlled according
to the selected setting.
Setting the airflow
XTurn the SmartKey to position 2 in the
ignition lock.XTo increase/reduce: press the K or
I button.
Activating/deactivating the MONO
function
This function is only available in vehicles for
Canada.
You can use the MONO function to adopt the
temperature and air distribution settings on
the driver's side for the front-passenger side.
XPress the º button.
The indicator lamp in the º button lights
up or goes out.
Defrosting the windshield
You can use this function to defrost the
windshield or to defrost the inside of the
windshield and the side windows.
i You should only select the defrosting
function until the windshield is clear again.
XTurn the SmartKey to position 2 in the
ignition lock.XTo activate: press the ¬ button.
The indicator lamp in the ¬ button lights
up.The climate control system switches to the
following functions:
R cooling with air dehumidification on
R high airflow 18
R high temperature 18
R air distribution to the windshield and
front side windows
R air-recirculation mode offXTo switch off: press the ¬ button.
The indicator lamp in the ¬ button goes
out. The previously selected settings come
into effect again. The cooling with air
dehumidification function remains on. Air-
recirculation mode remains deactivated.
or
XPress the à button.
The indicator lamp in the ¬ button goes
out. Airflow and air distribution are set to
automatic mode.
or
XTurn temperature control : or D
clockwise or counter-clockwise
( Y page 119).
or
XPress the K or I button.
MAX COOL maximum cooling
The MAX COOL function is only available in
vehicles for the USA.
MAX COOL is only operational when the
engine is running.
When you activate MAX COOL, climate
control switches to the following functions:
R maximum cooling
R maximum airflow
R air-recirculation mode on
18Depending on the outside temperature.Operating the climate control system123Climate controlZ

XTo activate: press the Ù button.
The indicator lamp in the button lights up.XTo deactivate: press the Ù button
again.
The indicator lamp goes out. The previously
selected settings come into effect again.
Defrosting the windows
Windows fogged up on the inside
XActivate the cooling with air
dehumidification function ¿.XActivate automatic mode Ã.XIf the windows continue to fog up, activate
the defrosting function ( Y page 123).
i
You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside
XSwitch on the windshield wipers.XPress the _ button repeatedly until the
O or P symbol appears in the
display.
i You should only select this setting until
the windshield is clear again.
Rear window defroster
Activating/deactivating
GWARNING
Any accumulation of snow and ice should be
removed from the rear window before driving.
Visibility could otherwise be impaired,
endangering you and others.
The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the window is clear as it only switches
off automatically after several minutes.
If the battery voltage is too low, the rear
window defroster may switch off.
XTurn the SmartKey to position 2 in the
ignition lock.XPress the ¤ button.
The indicator lamp in the ¤ button lights
up or goes out.
Problems with the rear window
defroster
The rear window defroster has deactivated
itself prematurely or cannot be activated.
XSwitch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
When the battery is sufficiently charged,
the rear window defroster is activated
again automatically.
Activating/deactivating air-
recirculation mode
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.
GWARNING
Fogged windows impair visibility,
endangering you and others. If the windows
begin to fog on the inside, switching off the
air recirculation mode immediately should
clear interior window fogging. If interior
window fogging persists, make sure the air
conditioning is activated, or press the ¬
button.
XTurn the SmartKey to position 2 in the
ignition lock.XTo activate: press the g button.
The indicator lamp in the g button lights
up.
i In the event of high pollution levels 19
or at
high outside temperatures, air-
recirculation mode is automatically
activated. When air-recirculation mode is
19 Automatic climate control only.124Operating the climate control systemClimate control