check engine light MERCEDES-BENZ GL 2014 Owners Manual

AMG adaptive sport suspension
system................................................ 221
AMG menu (on-board computer).....287
Anti-lock braking system
see ABS (Anti-lock Braking System)
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Approach/departure angle..............200
Ashtray...............................................351
Assistance display (on-board
computer)..........................................280
Assistance menu (on-board
computer)..........................................280
ASSYST PLUS
Displaying a service message........375
Hiding a service message..............375
Notes.............................................374
Resetting the service interval
display...........................................375
Service message ............................ 374
Special service requirements ......... 375
ATA (Anti-Theft Alarm system)
Activating/deactivating...................77
Function ...........................................77
Switching off the alarm....................77
ATTENTION ASSIST
Activating/deactivating.................281
Display message............................309
Function/notes.............................239
Audio menu (on-board computer)....278
Audio system
see separate operating instructions
Authorized Mercedes-Benz Center
see Qualified specialist workshop
Authorized Workshop
see Qualified specialist workshop
AUTO lights
Display message............................306
see Lights
Automatic headlamp mode..............128
Automatic transmission
Automatic drive program...............178
Changing gear...............................176
DIRECT SELECT lever.....................173
Display message............................320
Drive program display....................173
Driving tips....................................176
Emergency running mode..............182
Engaging drive position .................. 175
Engaging neutral............................174
Engaging park position
automatically.................................174
Engaging reverse gear...................174
Engaging the park position............173
Kickdown.......................................176
Manual drive program....................178
Manual drive program (AMG
vehicles)........................................179
Manual drive program (vehicles
with the ON&OFFROAD package)..179
Overview........................................173
Problem (malfunction)...................182
Program selector button................177
Pulling away...................................170
Starting the engine........................169
Steering wheel paddle shifters......177
Trailer towing.................................176
Transmission position display........173
Transmission positions..................175
Automatic transmission
emergency mode............................... 182
Axle load, permissible (trailer
towing)...............................................457
B
Bag hook............................................346
Ball coupling
Installing........................................265
Removing.......................................269
Storing...........................................269
BAS (Brake Assist System).................68
BAS PLUS (Brake Assist System
PLUS)....................................................68
Battery (SmartKey)
Checking .......................................... 83
Important safety notes....................83
Replacing.........................................83
Battery (vehicle)
Charging........................................394
Display message............................307
Important safety notes..................391
Jump starting.................................395
Overview........................................391
Index5

Central locking
Automatic locking (on-board
computer)......................................284
Locking/unlocking (SmartKey)........80
Changing bulbs
Brake lamps...................................140
High-beam headlamps...................139
Low-beam headlamps....................138
Child-proof locks
Important safety notes....................65
Rear doors.......................................66
Children
In the vehicle...................................60
Restraint systems............................60
Special seat belt retractor...............63
Child seat
LATCH-type (ISOFIX) child seat
anchors ............................................ 63
Top Tether.......................................64
Cigarette lighter................................352
Cleaning
Mirror turn signal...........................380
Trailer tow hitch.............................381
Climate control
3-zone automatic climate control
with additional rear-compartment
climate control ............................... 152
Automatic climate control (3-zone) 150
Controlling automatically...............156
Cooling with air dehumidification..155
Defrosting the windows.................160
Defrosting the windshield..............159
Dual-zone automatic climate
control...........................................147
Important safety notes..................146
Indicator lamp ................................ 156
Information about using 3-zone
automatic climate control..............154
Maximum cooling..........................159
Notes on using dual-zone
automatic climate control..............149
Overview of systems......................146
Problems with cooling with air
dehumidification............................156
Problem with the rear window
defroster........................................161
Rear control panel.........................150
Rear control panel (3-zone
automatic climate control with
additional rear-compartment
climate control).............................152
Refrigerant.....................................452
Refrigerant filling capacity.............452
Setting the air distribution.............158
Setting the airflow.........................158
Setting the air vents......................162
Setting the climate mode (AIR
FLOW)............................................157
Setting the temperature................157
Switching air-recirculation mode
on/off............................................161
Switching on/off...........................154
Switching residual heat on/off......161
Switching the rear window
defroster on/off............................160
Switching the ZONE function on/
off..................................................159
Coat hooks.........................................347
Cockpit
Overview..........................................32
see Instrument cluster
COLLISION PREVENTION ASSIST
Operation/notes..............................69
COMAND
ON&OFFROAD menu.....................262
see separate operating instructions
COMAND display
Cleaning ......................................... 381
Combination switch..........................131
Consumption statistics (on-board
computer)..........................................275
Convenience closing feature..............95
Convenience opening feature............95
Coolant (engine)
Checking the level.........................373
Display message............................306
Filling capacity...............................451
Important safety notes..................450
Temperature (on-board computer).287
Temperature gauge ........................ 272
Warning lamp ................................. 334
Cooling
see Climate control
Copyright.............................................30
Index7

Symmetrical low beam..................128
Tire ruts.........................................199
Towing a trailer..............................264
Traveling uphill ............................... 200
Wet road surface...........................194
DSR (Downhill Speed Regulation)
Display message............................312
Function/notes.............................256
DVD audio
Operating (on-board computer).....278
DVD video
Operating (on-board computer).....279
E
EASY-ENTRY feature
Activating/deactivating.................285
Function/notes.............................121
EASY-EXIT feature
Crash-responsive...........................122
Function/notes.............................121
Switching on/off...........................285
EBD (electronic brake force
distribution)
Display message............................293
Function/notes ................................ 74
ECO display
Function/notes.............................192
On-board computer.......................276
Electronic Stability Program
see ESP®(Electronic Stability Program)
Emergency release
Driver's door....................................88
Vehicle.............................................88
Emergency spare wheel
General notes................................439
Important safety notes..................439
Removing.......................................440
Storage location............................440
Technical data...............................441
Emergency Tensioning Devices
Function ...........................................59
Safety guidelines.............................43
Emergency unlocking
Tailgate............................................93
Emissions control
Service and warranty information....24
Engine
Check Engine warning lamp ........... 333
Display message............................306
Engine number......................444, 445
Irregular running............................172
Jump-starting.................................395
Starting problems..........................172
Starting the engine with the
SmartKey.......................................169
Starting with KEYLESS-GO.............170
Switching off..................................189
Tow-starting (vehicle) ..................... 400
Engine electronics
Problem (malfunction)...................172
Engine jump starting
see Jump starting (engine)
Engine oil
Adding...........................................372
Additives........................................450
Checking the oil level ..................... 371
Checking the oil level using the
dipstick..........................................371
Display message............................308
Filling capacity...............................449
Notes about oil grades ................... 449
Notes on oil level/consumption....371
Temperature (on-board computer).287
Viscosity........................................450
ESP®(Electronic Stability
Program)
4ETS................................................72
AMG menu (on-board computer)...287
Characteristics ................................. 73
Deactivating/activating...................73
Display message............................291
Function/notes ................................ 72
General notes..................................72
Important safety information...........72
Trailer stabilization ........................... 74
Warning lamp ................................. 329
Exhaust check...................................192
Exhaust pipe (cleaning instructions)381
Exterior lighting
see Lights
Exterior mirrors
Adjusting.......................................122
Dipping (automatic).......................123
10Index

Sliding sunroof
Important safety notes....................98
Opening/closing..............................99
Problem (malfunction)...................103
Resetting.......................................100
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery.......................83
Changing the programming.............81
Checking the battery.......................83
Convenience closing feature............96
Convenience opening feature..........95
Display message............................323
Door central locking/unlocking.......80
Important safety notes....................80
Loss.................................................85
Mechanical key................................82
Overview..........................................80
Positions (ignition lock).................167
Problem (malfunction).....................85
Starting the engine........................169
Snow chains
Information....................................407
Snow drive program ....................... 255
Sockets
Center console..............................353
General notes................................352
Luggage compartment...................353
Rear compartment.........................353
Specialist workshop............................ 28
Special seat belt retractor.................. 63
Speed, controlling
see Cruise control
Speedometer
Digital............................................276
In the Instrument cluster.................33
Segments......................................273
Selecting the unit of measurement 282
see Instrument cluster
SRS (Supplemental Restraint
System)
Display message............................299
Introduction.....................................43
Warning lamp ................................. 332
Warning lamp (function) ................... 43
Standing lamps
Display message............................305
Switching on/off...........................131
Starting (engine)................................ 169
STEER CONTROL..................................76
Steering (display message)..............322
Steering wheel
Adjusting (electrically)...................120
Adjusting (manually)......................119
Button overview...............................35
Buttons (on-board computer) ......... 273
Cleaning ......................................... 382
Important safety notes..................119
Paddle shifters...............................177
Steering wheel heating..................120
Storing settings (memory function) 125
Steering wheel heating
Problem (malfunction)...................121
Switching on/off...........................120
Steering wheel paddle shifters........177
Stopwatch (RACETIMER)................... 287
Stowage areas...................................340
Stowage compartments
Armrest (under).............................342
Center console..............................342
Cup holders...................................348
Eyeglasses compartment...............342
Glove box .......................................341
Important safety information.........341
Stowage net ................................... 343
Stowage net.......................................343
Stowage space
Center console (rear).....................342
Summer tires.....................................406
Sun visor............................................350
Supplemental restraint system
see SRS (Supplemental Restraint
System)
Surround lighting (on-board
computer)..........................................284
Suspension tuning
AMG adaptive sport suspension
system...........................................221
SETUP (on-board computer)..........287
SUV
(Sport Utility Vehicle).......................26
18Index

SRS (Supplemental Restraint System)
Introduction
SRS consists of:
RuSRS warning lamp
RAir bags
RThe air bag control unit with crash sensors
REmergency Tensioning Devices for the
front seat belts and the outer seat belts in
the rear
RSeat belt force limiters for the front seat
belts and the outer seat belts in the rear
SRS reduces the risk of vehicle occupants
coming into contact with parts of the
vehicle's interior in the event of an accident.
It can also reduce the forces to which vehicle
occupants are subjected during an accident.
SRS warning lamp
GWARNING
If SRS is malfunctioning, child restraint
system components may be triggered
unintentionally or might not be triggered at all
in the event of an accident with a high rate of
vehicle deceleration. There is an increased
risk of injury, possibly even fatal.
Have SRS checked and repaired immediately
at a qualified specialist workshop.
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.
TheuSRS 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.
The SRS components are in operational
readiness when theuSRS warning lamp
goes out while the engine is running.
There is a malfunction if:
RtheuSRS warning lamp does not light
up when the ignition is switched on
Rthe engine is running and theuSRS
warning lamp does not go out after a few
seconds
Rthe engine is running and theuSRS
warning lamp lights up again
Safety guidelines for seat belts,
Emergency Tensioning Devices (ETDs)
and air bags
GWARNING
RDamaged seat belts or seat belts that have
been subjected to stress in an accident
must be replaced. Their anchoring points
must also be checked. Only use seat belts
installed or supplied by an authorized
Mercedes-Benz Center.
RAir bags and pyrotechnic Emergency
Tensioning Devices (ETDs) contain
perchlorate material, which may require
special handling and regard for the
environment. Check your national disposal
guidelines. California residents, see
www.dtsc.ca.gov/HazardousWaste/
Perchlorate/index.cfm.
RAir bags and ETDs are designed to function
on a one-time-only basis. An air bag or ETD
that has deployed must be replaced. PRE-
SAFE®has electrically operated reversible
belt tensioners in addition to the
pyrotechnic ETDs.
RDo not pass seat belts over sharp edges.
They could tear.
RDo not make any modification that could
change the effectiveness of the seat belts.
RDo not bleach or dye seat belts as this may
severely weaken them. In a crash they may
not be able to provide adequate protection.
RNo modifications of any kind may be made
to any components or wiring of the SRS.
RDo not change or remove any component
or part of the SRS.
Occupant safety43
Safety
Z

RBAS PLUS (BrakeAssistSystem Plus)
(Ypage 68)
RCOLLISION PREVENTION ASSIST (distance
warning function and adaptive Brake
Assist) (Ypage 69)
RESP®(ElectronicStabilityProgram)
(Ypage 72)
REBD (ElectronicBrake forceDistribution)
(Ypage 74)
RADAPTIVE BRAKE (Ypage 75)
RPRE-SAFE®Brake (Ypage 75)
RSTEER CONTROL (Ypage 76)
Important safety notes
If you fail to adapt your driving style or
become distracted, the driving safety
systems can neither reduce the risk of
accident nor override the laws of physics.
Driving safety systems are merely aids
designed to assist driving. You are
responsible for the distance to the vehicle in
front, for vehicle speed and for braking in
good time. Always adapt your driving style to
suit the prevailing road and weather
conditions and maintain a safe distance from
the vehicle in front. Drive carefully.
iThe driving safety systems described only
work as effectively as possible when there
is adequate contact between the tires and
the road surface. Please pay special
attention to the notes on tires,
recommended minimum tire tread depths,
etc. (Ypage 404).
In wintry driving conditions, always use
winter tires (M+S tires) and if necessary,
snow chains. Only in this way will the
driving safety systems described in this
section work as effectively as possible.
ABS (Anti-lock Braking System)
General information
ABS regulates brake pressure in such a way
that the wheels do not lock when you brake.
This allows you to continue steering the
vehicle when braking.
The%ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
Important safety notes
iObserve the "Important safety notes"
section (Ypage 67).
GWARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking
characteristics may be severely impaired.
Additionally, further driving safety systems
are deactivated. There is an increased danger
of skidding and accidents.
Drive on carefully. Have ABS checked
immediately at a qualified specialist
workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp (Ypage 326) and
display messages which may be shown in the
instrument cluster (Ypage 291).
ABS works from a speed of about 5 mph
(8 km/h), regardless of road-surface
conditions. ABS works on slippery surfaces,
even when you only brake gently.
Braking
XIf ABS intervenes:continue to depress the
brake pedal vigorously until the braking
situation is over.
XTo make a full brake application:
depress the brake pedal with full force.
If ABS intervenes when braking, you will feel
a pulsing in the brake pedal.
Driving safety systems67
Safety
Z

ProblemPossible causes/consequences andPPSolutions
The engine cannot be
started using the
SmartKey.
The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary
(Ypage 394).
or
XJump-start the vehicle (Ypage 395).
or
XConsult a qualified specialist workshop.
The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle.
A door is open. Therefore, the SmartKey cannot be detected as
easily.
XClose the door and try to start the vehicle again.
There is interference from a powerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
Doors
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park positionP
RStart the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
GWARNING
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.
GWARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is a risk of injury,
particularly in the event of sudden braking or
a sudden change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
You should preferably place luggage or loads
in the cargo compartment. Observe the
loading guidelines (Ypage 340).
86Doors
Opening and closing

Problems with the windshield wipers
ProblemPossible causes/consequences andPPSolutions
The windshield wipers
are jammed.
Leaves or snow, for example, may be obstructing the windshield
wiper movement. The wiper motor has been deactivated.
XFor safety reasons, you should remove the SmartKey from the
ignition lock.
or
XSwitch off the engine using the Start/Stop button and open the
driver's door.
XRemove the cause of the obstruction.
XSwitch the windshield wipers back on.
The windshield wipers
fail completely.
The windshield wiper drive is malfunctioning.
XSelect another wiper speed on the combination switch.
XHave the windshield wipers checked at a qualified specialist
workshop.
Windshield wipers143
Lights and windshield wipers
Z

Problems with the engine
ProblemPossible causes/consequences andPPSolutions
The engine does not
start. The starter motor
can be heard.
RThere is a malfunction in the engine electronics.
RThere is a malfunction in the fuel supply.
XTry to start the engine again (Ypage 169). Avoid excessively
long and frequent attempts to start the engine as these will drain
the battery.
If the engine does not start after several attempts:
XConsult a qualified specialist workshop.
The engine does not
start. You cannot hear
the starter motor.
The on-board voltage is too low because the battery is too weak
or discharged.
XJump-start the vehicle (Ypage 395).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop.
The starter motor was exposed to a thermal load that was too high.
XAllow the starter motor to cool down for approximately two
minutes.
XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop.
The engine is not
running smoothly and
is misfiring.
There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
XOnly depress the accelerator pedal slightly.
XHave the cause rectified immediately at a qualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic
converter and damage it.
The coolant
temperature gauge
shows a value above
248 ‡ (120 †).
The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant
to cool down.
XCheck the coolant level (Ypage 373). Observe the warning
notes as you do so and add coolant if necessary.
172Driving
Driving and parking

increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
!Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected to a heavy
load, do not stop the vehicle immediately.
Drive on for a short while. This allows the
airflow to cool the brakes more quickly.
Wet roads
If you have driven for a long time in heavy rain
without braking, there may be a delayed
reaction from the brakes when braking for the
first time. This may also occur after the
vehicle has been washed or driven through
deep water.
You then have to depress the brake pedal
more firmly. Maintain a greater distance from
the vehicle in front.
After driving on a wet road or having the
vehicle washed, brake firmly while paying
attention to the traffic conditions. This will
warm up the brake discs, thereby drying them
more quickly and protecting them against
corrosion.
Limited braking performance on salt-
treated roads
If you drive on salted roads, a layer of salt
residue may form on the brake discs and
brake pads. This can result in a significantly
longer braking distance.
RBrake occasionally to remove any possible
salt residue. Make sure that you do not
endanger other road users when doing so.
RCarefully depress the brake pedal and the
beginning and end of a journey.
RMaintain a greater distance to the vehicle
ahead.
Servicing the brakes
!If the red brake warning lamp lights up in
the instrument cluster and you hear a
warning tone while the engine is running,
the brake fluid level may be too low.
Observe additional warning messages in
the multifunction display.
The brake fluid level may be too low due to
brake pad wear or leaking brake lines.
Have the brake system checked
immediately. This work should be carried
out at a qualified specialist workshop.
!A function or performance test should
only be carried out on a 2-axle
dynamometer. If you are planning to have
the vehicle tested on such a dynamometer,
contact an authorized Mercedes-Benz
Center to obtain further information first.
Otherwise, you could damage the drive
train or the brake system.
!Because ESP®is an automatic system,
the engine and ignition must be switched
off (SmartKey in position0or1or Start/
Stop button in position0or1) when the
electric parking brake is being tested on a
brake dynamometer (maximum
10 seconds).
Braking triggered automatically by ESP®
may seriously damage the brake system.
All checks and maintenance work on the
brake system must be carried out at a
qualified specialist workshop. Consult a
qualified specialist workshop to arrange this.
Have brake pads installed and brake fluid
replaced at a qualified specialist workshop.
If the brake system has only been subject to
moderate loads, you should test the
functionality of your brakes at regular
intervals. To do so, press firmly on the brake
pedal when driving at a high speed. This
improves the grip of the brake pads.
You can find a description of Brake Assist
(BAS) on (Ypage 68) or of BAS PLUS on
(Ypage 68).
194Driving tips
Driving and parking