check engine light MERCEDES-BENZ GLK SUV 2012 Owners Manual

Setting the air vents
......................141
Setting the climate mode .............. .132
Setting the temperature ................132
Switching air-recirculation mode
on/off ............................................ 135
Switching on/off ........................... 131
Switching residual heat on/off ......136
Switching the rear window heat-
ing on/off ...................................... 135
Switching the ZONE function on/
off .................................................. 134
THERMATIC automatic climate
control (2-zone) ............................. 129
THERMOTRONIC (3-zone) auto-
matic climate control .....................130
Clock
Setting (4-button multifunction
steering wheel) .............................. 227
Coat hooks ......................................... 303
Cockpit Overview .......................................... 30
see Instrument cluster
Collapsible emergency spare
wheel
see Emergency spare wheel
COMAND Online
see separate operating instructions
Combination switch ..........................113
Constant headlamp mode see Daytime driving lights
Consumption statistics
On-board computer (12-button
multifunction steering wheel) ........230
On-board computer (4-button
multifunction steering wheel) ........226
Convenience closing feature ..............90
Convenience opening/closing (air-
recirculation mode) ........................... 136
Convenience opening feature ............90
Coolant (engine) Checking the level .........................316
Display message (12-button mul-
tifunction steering wheel) ..............267
Display message (4-button multi-
function steering wheel) ................264
Important safety notes ..................371
Temperature gauge (12-button
multifunction steering wheel) ........227 Temperature gauge (4-button
multifunction steering wheel)
........224
Warning lamp ................................. 292
Cooling
see Climate control
Cornering lamps
Changing bulbs .............................. 121
Cornering light function
Display message (12-button mul-
tifunction steering wheel) ..............260
Display message (4-button multi-
function steering wheel) ................257
Function/notes ............................. 115
Crash-responsive emergency light-
ing ....................................................... 118
Cruise control Cruise control lever .......................174
Deactivating ................................... 175
Display message (12-button mul-
tifunction steering wheel) ..............275
Display message (4-button multi-
function steering wheel) ................270
Driving system ............................... 173
Important safety notes ..................173
LIM indicator lamp .........................174
Selecting ........................................ 174
Setting a speed .............................. 175
Storing and maintaining current
speed ............................................ .174
Cup holder
Centre console .............................. 305
Important safety notes ..................305
Rear compartment .........................305 D
Dashboard lighting see Instrument cluster lighting
Data
see Technical data
Date
Setting (4-button multifunction
steering wheel) .............................. 227
Daytime driving lamps
Switching on/off (on-board com-
puter, 12-button multifunction
steering wheel) .............................. 2398
Index

J
Jack Storage location ............................ 327
Using ............................................. 333
Jump start (engine)
see Jump starting (engine)
Jump starting (engine) ......................341 K
Key Changing the battery .......................79
Checking the battery .......................79
Convenience closing feature ............90
Convenience opening feature ..........90
Display message (4-button multi-
function steering wheel) ................281
Door central locking/unlocking .......76
Emergency key element ................... 78
Important safety notes ....................76
Loss ................................................. 81
Modifying the programming .............78
Positions (ignition lock) .................147
Problem (malfunction) .....................81
Starting the engine ........................148
KEYLESS-GO
Convenience closing ........................90
Display message (12-button mul-
tifunction display) ..........................283
Display message (4-button multi-
function display) ............................ 281
Locking ............................................ 77
Start/Stop button .......................... 147
Starting the engine ........................149
Unlocking ......................................... 77
Key positions
Key ................................................ 147
KEYLESS GO .................................. 147
Keys
Display message (12-button mul-
tifunction steering wheel) ..............283
Kickdown
Driving tips .................................... 158
Manual drive program ....................160
Kneebag ............................................... 46 L
Lamps see Warning and indicator lamps
Lane Keeping Assist
Activating/deactivating .................238
Display message (12-button mul-
tifunction steering wheel) ..............273
Function/informatio n.................... 205
Lane package ..................................... 203
Lashing eyelets ................................. 299
Licence plate lighting Display message (12-button mul-
tifunction steering wheel) ..............262
Display message (4-button multi-
function steering wheel) ................259
Lighting
see Lights
Lights
Activating/deactivating the exte-
rior lighting delayed switch-off
(12-button multifunction steering
wheel) ............................................ 240
Activating/deactivating the inte-
rior lighting delayed switch-off
(12-button multifunction steering
wheel) ............................................ 241
Active light function .......................114
Automatic headlamp mode ............111
Cornering light function .................115
Dipped-beam headlamps ...............111
Driving abroad ............................... 110
Foglamps ....................................... 112
Foglamps (extended range) ...........115
Hazard warning lamps ...................114
Headlamp flasher ........................... 113
Headlamp range ............................ 112
Light switch ................................... 111
Main-beam headlamps ................... 113
Motorway mode ............................. 115
Off-road lights ................................ 115
Parking lamps ................................ 112
Rear foglamp ................................. 112
Setting brightness for display/
switches (on-board computer) .......239
Side lamps ..................................... 112
Switching Adaptive Highbeam
Assist on/off ................................. 24014
Index

MP3
Operating ...................................... .233
see Separate operating instructions
Multifunction display
4-button multifunction steering
wheel ............................................. 226
Permanent display (12-button
multifunction steering wheel) ........239
Multi-function display
12-button multifunction steering
wheel ............................................. 229N
Navigation Menu (on-board computer) ............232
On-board computer (12-button
multifunction steering wheel) ........232
see separate operating instructions
NECK-PRO head restraints
Operation ........................................ .49
Resetting after being triggered ........49
NECK-PRO luxury head restraints
Operation ........................................ .49
Resetting after being triggered ........49
Notes on running in a new vehicle ..146 O
Occupant safety Children in the vehicle .....................54
Important safety notes ....................42
Odometer
4-button multifunction steering
wheel ............................................. 226
see Total distance recorder
see Trip meter
Off-road drive program .....................215
Off-road driving Checklist after driving off-road ......171
Checklist before driving off-road .... 171
General information .......................170
Important safety notes ..................170
Travelling uphill .............................. 172
Off-road lights ................................... .115
Off-road system 4MATIC .......................................... 213
DSR ............................................... 213Off-road ABS
.................................... 66
Off-road drive program ..................215
Off-road ESP ®
.................................. 69
Oil
see Engine oil
On-board computer
Light submenu ............................... 239
Operating the TV ............................ 234
On-board computer (12-button
multifunction steering wheel)
Assist menu ................................... 236
Audio menu ................................... 233
Convenience submenu ..................243
Important safety notes ..................224
Instrument cluster submenu ..........238
Lights submenu ............................. 239
Menu overview .............................. 230
Navigation menu ............................ 232
Operating ...................................... .228
Operating the video DVD ...............234
Range ............................................ 231
Service menu ................................. 238
Standard display submenu ............230
Telephone menu ............................ 234
Trip menu ...................................... 230
On-board computer (12-button
multifunction steering wheel)
Displaying service messages .........312
Display messages ..........................245
Heating submenu ........................... 242
Message memory .......................... 246
Vehicle submenu ........................... 241
On-board computer (12-button
multifunction steering wheel)Set-
tings menu ......................................... 238
On-board computer (12-button
multifunction steering wheel) sub-
menu
Factory setting ............................... 244
On-board computer (4-button mul-
tifunction steering wheel)
Important safety notes ..................224
Menu overview .............................. 226
Switching daytime driving lights
on/off ............................................ 22716
Index

Towing
Important safety notes ..................342
With the rear axle raised ................344
Towing a trailer
Active Blind Spot Assist .................210
Active Lane Keeping Assist .... 207, 213
Active Parking Assist .....................196
Lights display message (12-but-
ton multifunction steering wheel) ..260
Lights display message (4-button
multifunction steering wheel) ........257
Towing away
Fitting the towing eye ....................343
Removing the towing eye ...............344
With both axles on the ground .......344
Tow-starting
Emergency engine starting ............345
Fitting the towing eye ....................343
Important safety notes ..................342
Removing the towing eye ...............344
Trailer coupling
see Towing a trailer
Trailer towing
7-pin connector ............................. 221
Blind Spot Assist ............................ 205
Cleaning the trailer tow hitch ......... 321
Coupling up a trailer ......................220
Decoupling a trailer .......................220
Driving tips .................................... 215
ESP ®
................................................ 69
Fitting the ball coupling .................217
Important safety notes ..................215
Mounting dimensions ....................373
Parktroni c...................................... 191
Power supply ................................. 221
Removing the ball coupling ............220
Shift range ..................................... 158
Storing the ball coupling ................220
Trailer loads ................................... 374
Transmission
see Automatic transmission
see Manual transmission
Transmission position display .........156
Transmission position display
(DIRECT SELECT lever) ......................156
Transporting the vehicle ..................345Travelling uphill
Brow of hill ..................................... 173
Driving downhill ............................. 173
Maximum gradient-climbing capa-
bility .............................................. .173
Trim pieces (cleaning instructions) .323
Trip computer On-board computer (12-button
multifunction steering wheel) ........230
On-board computer (4-button
multifunction steering wheel) ........226
Trip meter
Displaying/resetting (4-button
multifunction steering wheel) ........226
Displaying (12-button multifunc-
tion steering wheel) .......................230
Resetting (12-button multifunc-
tion steering wheel) .......................232
Turn signal
Display message (12-button mul-
tifunction steering wheel) ..............261
Display message (4-button multi-
function steering wheel) ................258
see Turn signals
Turn signals
Changing bulbs (front) ...................120
Changing bulbs (rear) ....................121
Switching on/off ........................... 113
TV
Operating (on-board computer) .....234
see Separate operating instructions
Two-way radio
Frequencies ................................... 363
Installation ..................................... 363
Transmission output (maximum) .... 363
Type identification plate
see Vehicle identification plate
Tyre pressure
Display message (12-button mul-
tifunction steering wheel) ..............277
Display message (4-button multi-
function steering wheel) ................276
Not reached (TIREFIT) ....................331
Pressure loss warning ....................355
Reached (TIREFIT) ..........................331
Recommended ............................... 353
Tyres
Checking ........................................ 351 22
Index

from being propelled towards the point
of impact. It can thus reduce the risk of
injury.
In accidents in which an airbag is deployed,
it provides increased protection only if the
seat belt is worn correctly. G
WARNING
If service work is not carried out correctly, the
operating safety of your vehicle may be affec-
ted. This could cause you to lose control of
your vehicle and cause an accident. More-
over, the safety systems may no longer be
able to protect you or others as they are
designed to do.
Always have service work carried out at a
qualified specialist workshop. G
WARNING
Modifications to or work performed incor-
rectly on the following parts can result in the
restraint systems not functioning as intended:
R the restraint system, consisting of seat
belts and their anchorage points, belt ten-
sioners, belt force limiters and airbags
R the wiring
R networked electronic systems
Airbags and belt tensioners could fail to
deploy or be triggered in an accident despite
the deceleration force being sufficient to trig-
ger the systems, or could be triggered unin-
tentionally. For this reason, never make any
modifications to the restraint systems.
Therefore, you must not tamper with elec-
tronic components or their software. SRS (Supplemental Restraint System)
Introduction SRS consists of:
R
the 6 SRS warning lamp
R airbags
R airbag control unit (with crash sensors) R
belt tensioners
R belt force limiters
SRS reduces the risk of occupants coming
into contact with the vehicle's interior in the
event of an accident. It can also reduce the
forces to which occupants are subjected dur-
ing an accident.
SRS warning lamp SRS functions are checked regularly when
you switch on the ignition and when the
engine is running. Therefore, malfunctions
can be detected in good time.
The
6 SRS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out no later than a few seconds
after the engine is started. G
WARNING
If SRS is malfunctioning, individual systems
may be triggered unintentionally or might not
be triggered in the event of an accident with
a high rate of vehicle deceleration.
A malfunction has occurred if:
R the 6 SRS warning lamp does not light
up when the ignition is switched on.
R the engine is running and the 6SRS
warning lamp does not go out after a few
seconds.
R the engine is running and the 6SRS
warning lamp lights up again.
In this case, have SRS checked immediately
at a qualified specialist workshop.
Triggering of belt tensioners, belt force
limiters and airbags During the first stage of a collision, the airbag
control unit evaluates important physical
data relating to vehicle deceleration or accel-
eration, such as:
R
duration
R direction
R magnitude Occupant safety
43Safety Z

X
To activate/deactivate: press button;.
If indicator lamp :is lit, operation of the
rear side windows is disabled. Operation is
only possible using the switches in the driv-
er's door. If indicator lamp :is off, oper-
ation is possible using the switches in the
rear compartment. Driving safety systems
Driving safety systems overview
In this section, you will find information about
the following driving safety systems:
R ABS ( Anti-lock BrakingSystem)
R BAS ( Brake Assist System)
R Adaptive brake lamps
R ESP ®
(Electronic StabilityProgram)
R EBD ( electronic brake force distribution) Important safety notes
If you fail to adapt your driving style or if you
are inattentive, the driving safety systems can
neither reduce the risk of accident nor over-
ride the laws of physics. Driving safety sys-
tems are merely aids designed to assist driv-
ing. You are responsible for the distance to
the vehicle in front, for vehicle speed and for
braking in good time. Always adapt your driv-
ing style to suit the prevailing road and
weather conditions and maintain a safe dis-
tance from the vehicle in front. Drive care-
fully.
i The driving safety systems described only
work as effectively as possible when there
is adequate contact between the tyres and
the road surface. Please pay special atten-
tion to the notes on tyres, recommended
minimum tyre tread depths, etc.
(Y page 350).
In wintry driving conditions, always use
winter tyres (M+S tyres) and, if necessary,
snow chains. Only in this way will the driv- ing safety systems described in this section
work as effectively as possible. ABS (Anti-lock Braking System)
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 65). G
WARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking charac-
teristics may be severely impaired. Addition-
ally, further driving safety systems are deac-
tivated. There is an increased danger of skid-
ding and accidents.
Drive on carefully. Have ABS checked imme-
diately at a qualified specialist workshop.
If ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp ( Ypage 286) and
any display messages that may appear in the
instrument cluster (Y page 247) or
(Y page 252).
ABS regulates brake pressure in such a way
that the wheels do not lock when you brake.
This allows you to continue steering the vehi-
cle when braking.
ABS works from a speed of about 8 km/h
upwards, regardless of road-surface condi-
tions. ABS works on slippery surfaces, even
when you only brake gently.
The yellow !ABS warning lamp in the
instrument cluster lights up when the ignition
is switched on. It goes out when the engine is
running.
Brakes X
If ABS intervenes: continue to depress the
brake pedal with force until the braking sit-
uation is over.
X To make a full brake application:
depress the brake pedal with full force. Driving safety systems
65Safety Z

:
& To lock the vehicle
; F To open/close the tailgate
= % To unlock the vehicle
When unlocking, the turn signals flash once.
When locking, they flash three times.
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (Y page 240).
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated and deactivated using
the on-board computer (Y page 242).
X To unlock centrally: press the%but-
ton.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
R the vehicle is locked again.
R the anti-theft system is primed again.
X To lock centrally: press the&button. KEYLESS-GO
General notes Bear in mind that the engine can be started
by any of the vehicle occupants if there is a
KEYLESS-GO key in the vehicle.
Locking/unlocking centrally You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry
the key with you. You can combine the KEY-
LESS-GO functions with the functions of a conventional key. Unlock the vehicle by using
KEYLESS-GO, for instance, and lock it using
the
& button on the key.
When locking or unlocking with KEYLESS-GO,
the distance between the key and the corre-
sponding door handle must not be greater
than 1 m.
KEYLESS-GO checks whether a valid key is in
the vehicle by periodically establishing a radio
connection between the vehicle and the key.
This happens:
R when the external door handles are
touched
R when starting the engine
R while the vehicle is in motion X
To unlock the vehicle: touch the inner
surface of the door handle.
X To lock the vehicle: touch sensor sur-
face :.
X Convenience closing feature: touch
recessed sensor surface ;for an exten-
ded period.
Further information on the convenience clos-
ing feature (Y page 90).
If you pull on the handle of the tailgate, only
the luggage compartment of the vehicle is
unlocked.
If the vehicle has been parked for a long time,
the sensor surfaces are deactivated automat-
ically. In order to unlock the door, pull the
door handle. In order to reactivate the sensor
surface, switch the ignition on again. Key
77Opening and closing Z

Problem Possible causes/consequences and
M
MSolutions You have lost the emer-
gency key element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. The engine cannot be
started using the key. The on-board voltage is too low.
X
Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 337).
or
X Jump-start the vehicle (Y page 341).
or
X Consult a qualified specialist workshop. The engine cannot be
started using KEYLESS-
GO. The key is in the
vehicle. A door is open. Therefore, the key cannot be detected as easily.
X
Close the door and try to start the vehicle again. There is interference from a powerful source of radio waves.
X
Start your vehicle with the key in the ignition lock. Doors
Important safety notes
G
WARNING
Only for the United Kingdom: if the vehicle
has been locked with the key, the double lock
function is activated as standard. It is then not
possible to open the doors from inside the
vehicle.
Therefore, do not leave any people behind in
the vehicle, particularly children, elderly peo-
ple or people in need of special assistance if
the vehicle has been locked with the key. As
a result, they may not be able to free them-
selves in the event of an emergency. As a
result, they could be seriously or even fatally
injured by prolonged exposure to extremely
high or low temperatures, for example. In this
case, rescuing people from outside the vehi-
cle is difficult.
Deactivate the interior motion sensor before
you lock the vehicle with the key. The doors can then be opened from the inside after the
vehicle has been locked from the outside with
the key.
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open a door from inside the vehicle at any
time, even if it has been locked
R start the vehicle using a key which has been
left in the vehicle
R release the parking brake
They could thereby endanger themselves and
others. Never leave children unsupervised in
the vehicle. Always take the key with you
when leaving the vehicle, even if you are only
leaving it for a short time. 82
DoorsOpening and closing

Interior lighting control
General notes In order to prevent the vehicle's battery from
discharging, the interior lighting functions are
automatically deactivated after some time
except for when the key is in position 2in the
ignition lock.
Automatic interior lighting control X
To activate/deactivate: press the|
button.
When the automatic interior lighting con-
trol is activated, the button is flush with the
overhead control panel.
The interior lighting automatically switches
on if you:
R unlock the vehicle
R open a door
R remove the key from the ignition lock
The interior lighting is activated for a short
time when the key is removed from the igni-
tion lock. You can activate this delayed
switch-off using the on-board computer
(Y page 241).
Manual interior lighting control X
To switch the front interior lighting on/
off: press the cbutton.
X To switch the rear interior lighting on/
off: press the ubutton.
X To switch the reading lamps on/off:
press the pbutton. Crash-responsive emergency lighting
The interior lighting is activated automatically
if the vehicle is involved in an accident.
X To switch off the crash-responsive
emergency lighting: press the hazard
warning lamp button.
or
X Lock and then unlock the vehicle using the
key. Replacing bulbs
Important safety notes
Xenon bulbs G
DANGER
Xenon bulbs are under high voltage. If you
touch the electrical contacts of a xenon bulb,
you could suffer an electric shock and be seri-
ously or even fatally injured. For this reason,
do not remove the cover of xenon bulbs.
Do not change the xenon bulbs yourself, but
have them replaced at a qualified workshop.
If your vehicle is equipped with xenon bulbs,
you can recognise this by the following: the
cone of light from the xenon bulbs moves
from the top to the bottom and back again
when you start the engine. For this to be
observed, the lights must be switched on
before starting the engine.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
that these function correctly at all times.
Have the headlamp setting checked regularly.
Other bulbs G
WARNING
Bulbs and lamps can be very hot. You should
therefore allow them to cool down before you
change them. Otherwise, you could be burned
if you touch them. 118
Replacing bulbsLights and windscreen wipers

R
Always keep the engine running and in gear
when driving on a downhill gradient. Acti-
vate DSR (Y page 213).
R Drive slowly and evenly, if necessary at
walking pace.
R Ensure that the wheels are in contact with
the ground at all times.
R Drive with extreme care on unknown off-
road routes where visibility is poor. For
safety reasons, get out of the vehicle first
and survey the off-road route.
R Check the depth of water before fording
rivers and streams.
R Look out for obstacles such as rocks, holes,
tree stumps and furrows.
R Always keep the side windows and the pan-
orama sliding sunroof closed during the
journey.
R Do not stray from marked routes or paths.
i Information about retrofitting special all-
terrain tyres is available from any qualified
specialist workshop.
Checklist before driving off-road X
Engine oil level: check the engine oil and
top it up if necessary.
X Tyre-change tool kit: check that the jack
is working and make sure you have the
wheelbrace, a robust tow cable and a fold-
ing spade in the vehicle.
X Wheels and tyres: check the tyre tread
depth and tyre pressure.
X Check for damage and remove any foreign
objects, e.g. small stones, from the
wheels/tyres.
X Replace any missing valve caps.
X Replace dented or damaged wheels.
Checklist after driving off-road Driving over rough terrain places greater
demands on your vehicle than driving on nor-
mal roads. After driving off-road, check the
vehicle. This allows you to detect damage promptly and reduce the risk of an accident
to yourself and other road users.
X Deactivate DSR ( Ypage 213).
X Clean the headlamps and rear lights and
check for damage.
X Clean the front and rear licence plates.
X Clean the wheels/tyres with a water jet and
remove any foreign objects.
X Clean the wheels, wheel arches and the
vehicle underside with a water jet; check
for any foreign objects and damage.
X Check whether twigs or other parts of
plants have become trapped. These
increase the risk of fire and can damage
fuel pipes, brake hoses or the rubber bel-
lows of the axle joints and propeller shafts.
X After the trip, examine without fail the
entire undercarriage, wheels, tyres, brakes,
bodywork structure, steering, chassis and
exhaust system for damage.
X After driving for extended periods across
sand, mud, gravel, water or in similarly dirty
conditions, have the brake discs, wheels,
brake pads/linings and axle joints checked
and cleaned.
X If you detect strong vibrations after off-road
travel, check for foreign objects in the
wheels and drive train and remove them if
necessary. Foreign objects can disturb the
balance and cause vibrations. Driving tips
171Driving and parking Z