2012 MERCEDES-BENZ GLK-Class fuel cap

Starting the engine with the
SmartKey ....................................... 132
Starting with KEYLESS-GO .............132
Switching off .................................. 143
Engine electronics
Problem (malfunction) ...................134
Engine oil
Adding ........................................... 239
Additives ........................................ 306
Checking the oil level ..................... 239
Checking the oil level using the
dipstick .......................................... 239
Display message ............................ 193
Filling capacity ............................... 304
Notes about oil grades ................... 305
Notes on oil level/consumption ....239
Viscosity ........................................ 306
ESP ®
(Electronic Stability
Program) Deactivating/activating ...................63
Display message ............................ 180
ETS/4ETS ........................................ 63
Function/notes ................................ 62
Important safety information ...........62
Trailer stabilization ........................... 64
Warning lamp ................................. 203
ETS/4ETS (Electronic Traction
System) ................................................ 63
Exhaust check ................................... 146
Exhaust tail pipe (cleaning
instructions) ...................................... 247
Exterior lighting see Lights
Exterior mirrors
Adjusting ......................................... 97
Dipping (automatic) .........................99
Folding in/out (automatically) .........98
Folding in/out (electrically) .............98
Folding in when locking (on-board
computer) ...................................... 178
Out of position (troubleshooting) .....99
Setting ............................................. 98
Storing settings (memory
function) ........................................ 100
Storing the parking position ............. 99F
Filler cap see Fuel filler flap
First-aid kit ......................................... 252
Flat tire Changing a wheel/mounting the
spare wheel ................................... 254
Preparing the vehicle .....................253
Raising the vehicle .........................255
see Emergency spare wheel
Floormat ............................................. 236
Folding the rear bench seat
forwards/back .................................. 214
Fording On flooded roads ........................... 148
Frequencies
Garage door opener .......................235
Front fog lamps ................................. 104
Display message ............................ 190
Switching on/off ........................... 104
Front windshield
see Windshield
Fuel
Additives ........................................ 305
Consumption statistics ..................170
Displaying the current
consumption .................................. 170
Displaying the range ......................170
Driving tips .................................... 145
Fuel gauge ....................................... 29
Important safety notes ..................304
Premium-grade unleaded gasoline . 304
Problem (malfunction) ...................143
Refueling ........................................ 141
Specifications ................................ 305
Tank content/reserve fuel .............304
Fuel filler flap
Opening/closing ............................ 141
Fuel level
Calling up the range (on-board
computer) ...................................... 170
Fuel tank
Capacity ........................................ 304
Problem (malfunction) ...................143
Fuse allocation chart (vehicle tool
kit) ...................................................... 252Index9

Folding the backrest (rear
compartment) forwards/back .......215
Folding the rear bench seat
forwards/back ............................... 214
Important safety notes ....................91
Seat heating problem ......................95
Storing settings (memory
function) ........................................ 100
Switching seat heating on/off .........95
Sensors (cleaning instructions) ....... 247
Service see ASSYST PLUS service interval
display
Service interval display
Displaying service messages .........243
Hiding service messages ...............243
Notes ............................................. 243
Service messages ..........................242
Service menu (on-board computer) . 175
Service products Brake fluid ..................................... 306
Capacities ...................................... 304
Coolant (engine) ............................ 307
Engine oil ....................................... 305
Fuel ................................................ 304
Important safety notes ..................302
Refrigerant (air-conditioning
system) .......................................... 306
Washer fluid ................................... 307
Settings
Factory (on-board computer) .........178
On-board computer .......................175
Setting the air distribution ............... 122
Setting the airflow ............................ 123
Side impact air bag ............................. 42
Side marker lamp (display
message) ............................................ 190
Side marker lamps (changing
bulbs) ................................................. 112
Side windows Convenience closing feature ............83
Convenience opening feature ..........83
Important safety information ...........82
Opening/closing .............................. 82
Problem (malfunction) .....................85
Resetting ......................................... 84Sliding sunroof
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery .......................72
Changing the programming .............71
Checking the battery .......................72
Convenience closing feature ............83
Convenience opening feature ..........83
Display message ............................ 198
Door central locking/unlocking .......68
Important safety notes ....................68
Loss ................................................. 74
Mechanical key ................................ 71
Positions (ignition lock) .................131
Problem (malfunction) .....................74
Starting the engine ........................132
Snow chains ...................................... 272
Sockets Center console .............................. 223
Luggage compartment ...................224
Points to observe before use .........223
Rear compartment .........................224
Spare wheel
Notes/data .................................... 297
Storage location ............................ 252
Stowing .......................................... 253
see Emergency spare wheel
Specialist workshop ............................ 23
Speed, controlling see Cruise control
Speedometer
Digital ............................................ 170
In the Instrument cluster .................29
Segments ...................................... 167
Selecting the unit of
measurement ................................ 175
see Instrument cluster
SRS (Supplemental Restraint
System) Display message ............................ 184
Introduction ..................................... 38
Warning lamp ................................. 205
Warning lamp (function) ................... 38
Standing lamps
Changing bulbs .............................. 111
Display message ............................ 190
Switching on/off ........................... 102Index15

an authorized Mercedes-Benz Center for
this purpose.
! To prevent ESP ®
from intervening, the
ignition must be switched off (SmartKey in
position 0 or 1) if:
R the parking brake is being tested on a
brake dynamometer.
R the vehicle is being towed with only one
axle raised (not permitted for vehicles
with 4MATIC).
The brake system could otherwise be
damaged.
Refueling
Important safety notes
GWARNING
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flames or smoking
materials near gasoline.
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and any skin or clothing
contact.
Direct skin contact with fuels and the
inhalation of fuel vapors are damaging to your
health.
GWARNING
Overfilling of the fuel tank may create
pressure in the system which could cause a
gas discharge. This could cause the gasoline
to spray back out when removing the fuel
pump nozzle, which could cause personal
injury.
! Do not use diesel to refuel vehicles with a
gasoline engine. Even small amounts of the
wrong fuel result in damage to the fuel
system and engine.
! Do not switch on the ignition if you
accidentally refuel with the wrong fuel.
Otherwise, the fuel will enter the fuel lines.
Notify a qualified specialist workshop and
have the fuel tank and fuel lines drained
completely.
Gasoline
Fuel grade
! You should only refuel with unleaded
premium-grade gasoline as this avoids
damaging the catalytic converter.
If engine running problems are apparent,
have the cause checked immediately and
repaired. Excess unburned fuel can
otherwise enter the catalytic converter,
leading to overheating and possibly
causing a fire.
! Use a filter when refueling from a fuel can.
Otherwise, the fuel lines and/or injection
system could be blocked by particles from
the fuel can.
i Only refuel with premium-grade unleaded
gasoline with a specified minimum octane
number of 91 (average value of 96 RON/
86 MON).
You will usually find information about the
fuel grade on the pump. If you cannot find
the label on the pump, ask the staff for
assistance.
You can find more information under "Fuel"
( Y page 304), or by contacting an
authorized Mercedes-Benz Service Center
or visiting http://www.mbusa.com (USA
only).
Refueling
Fuel filler flap
The fuel filler flap is unlocked or locked
automatically when you open or close the
vehicle with the SmartKey or using KEYLESS-
GO.
The position of the fuel filler cap is displayed
in the instrument cluster 8. The arrow
Refueling141Driving and parkingZ

next to the filling pump indicates the side of
the vehicle.:To open the fuel filler flap;To insert the fuel filler cap=Tire pressure table?Fuel type
Opening
XSwitch off the engine.XRemove the SmartKey from the ignition
lock.
KEYLESS-GO: open the driver’s door. This
switches the ignition to position 0, which
corresponds to having removed the
SmartKey. The driver’s door can be closed
again.XPress the fuel filler flap in the direction of
arrow :.
The fuel filler flap opens slightly.XOpen the fuel filler flap.XTurn the fuel filler cap counter-clockwise
and remove it.XInsert the fuel filler cap into the holder
bracket on the inside of filler flap ;.XCompletely insert the pump nozzle into the
filler neck and refuel.XOnly fill the tank until the pump nozzle
switches off.
! Overfilling the fuel tank could damage the
fuel system.
ClosingXReplace the fuel filler cap and turn it
clockwise. The fuel filler cap audibly
engages.XClose the fuel filler flap.
i If you drive with the fuel filler cap open,
reserve fuel warning lamp 8 flashes. In
addition, the ; Check Engine warning
lamp may light up. A message appears in
the multifunction display ( Y page 194).
For further information on warning and
indicator lamps in the instrument cluster,
see ( Y page 206).
i Close the fuel filler flap before locking the
vehicle. A locking pin otherwise prevents
the fuel filler flap from closing after the
vehicle has been locked.
142RefuelingDriving and parking

Display messagesPossible causes/consequences and M Solutions8
Fuel Level LowThe fuel level has dropped into the reserve range.XRefuel at the nearest gas station.CThere is only a very small amount of fuel in the fuel tank.XRefuel at the nearest gas station without fail.8
Gas Cap LooseThe fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.XCheck that the fuel filler cap is correctly closed.
If the fuel filler cap is not correctly closed:
XClose the fuel filler cap.
If the fuel filler cap is correctly closed:
XVisit a qualified specialist workshop.
Driving systems
Display messagesPossible causes/consequences and M SolutionsCruise Control
InoperativeCruise control is defective.
A warning tone also sounds.XVisit a qualified specialist workshop.Cruise Control
--- mphA condition for activating cruise control has not been fulfilled.
You attempted to save a speed of less than 20 mph (30 km/h).XIf the situation allows, drive faster than 20 mph ( 30 km/h) and
save the speed.XCheck the activation conditions for cruise control
( Y page 151).
Tires
GWARNING
Do not drive with a flat tire. A flat tire affects the ability to steer or brake the vehicle. You may
lose control of the vehicle. Continued driving with a flat tire will cause excessive heat build-up
and possibly a fire.
GWARNING
Follow recommended tire inflation pressures.
Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect
handling and fuel economy, and are more likely to fail from being overheated.
194Display messagesOn-board computer and displays

in an accident, which could result in serious or fatal injury, or it might deploy unexpectedly and
unnecessarily which could also result in injury.
Engine
ProblemPossible causes/consequences and M Solutions;
The yellow Check
Engine warning lamp
lights up while the
engine is running.There may be a malfunction, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system
R in the fuel system
The emission limit values may be exceeded and the engine may
be running in emergency mode.XHave the vehicle checked as soon as possible at a qualified
specialist workshop.
i In some states, you are required by law to immediately visit a
qualified specialist workshop as soon as the yellow Check
Engine warning lamp lights up. If in doubt, check whether such
legal regulations apply in the state/province in which you are
currently driving.
8
The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion. In addition, the
yellow Check Engine
warning lamp ;
may light up.The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.XObserve the additional display messages in the multifunction
display.XCheck that the fuel filler cap is correctly closed.XIf the fuel filler cap is not correctly closed: close the fuel filler
cap.XIf the fuel filler cap is closed: visit a qualified specialist
workshop.8
The yellow reserve fuel
warning lamp lights up
while the engine is
running.The fuel level has dropped into the reserve range.XRefuel at the nearest gas station.206Warning and indicator lamps in the instrument clusterOn-board computer and displays

"Technical Data" section to avoid damage
to the vehicle or the wheels.
R Only use snow chains when driving on
roads completely covered by snow. Do not
exceed the maximum permissible speed of
30 mph (50 km/h). Remove the snow
chains as soon as possible when you are no
longer driving on snow-covered roads.
R Local regulations may restrict the use of
snow chains. Applicable regulations must
be observed if you wish to mount snow
chains.
R Snow chains must not be mounted on
emergency spare wheels.
If you intend to mount snow chains, please
bear the following points in mind:
R you may not attach snow chains to all
wheel-tire combinations; see the
information under "Wheel and tire
combinations" in the "Wheels and tires"
section.
R mount snow chains only in pairs and only
to the rear wheels. Observe the
manufacturer's installation instructions.
! If snow chains are mounted on the front
wheels, the snow chains could grind
against the bodywork or components of the
chassis. This could result in damage to the
vehicle or the tires.
! Vehicles with steel wheels: if you wish
to mount snow chains on steel wheels,
make sure that you remove the respective
wheels' hubcaps first. The hubcaps may
otherwise be damaged.
i You may wish to deactivate
ESP ®
(Y page 62) when pulling away with
snow chains mounted. This way you can
allow the wheels to spin in a controlled
manner, achieving an increased driving
force (cutting action).Tire pressure
Tire pressure specifications
GWARNING
Follow recommended tire inflation pressures.
Do not underinflate tires. Underinflated tires
wear excessively and/or unevenly, adversely
affect handling and fuel economy, and are
more likely to fail from being overheated.
Do not overinflate tires. Overinflated tires can
adversely affect handling and ride comfort,
wear unevenly, increase stopping distance,
and result in sudden deflation (blowout)
because they are more likely to become
punctured or damaged by road debris,
potholes etc.
Do not overload the tires by exceeding the
specified load limit as indicated on the Tire
and Loading Information placard on the
driver's door B-pillar. Overloading the tires
can overheat them, possibly causing a
blowout. Overloading the tires can also result
in handling or steering problems, or brake
failure.
The recommended tire pressures for the tires
mounted at the factory can be found on the
labels described here.
Option 1) Tire and Loading Information
placard on the B-pillar on the driver's side of
the vehicle ( Y page 281).
The Tire and Loading Information placard
contains the recommended tire pressures for
cold tires on a fully loaded vehicle and for the
maximum permissible vehicle speed.
i The specifications given on the following
Tire and Loading Information placard are
examples. Tire pressure specifications are
vehicle-specific and may deviate from the
data shown here. The tire pressures
applicable to your vehicle can be found on
the Tire and Loading Information placard on
your vehicle.
Tire pressure273Wheels and tiresZ

Option 3) The tire pressure for the
emergency/collapsible spare wheel
(depending on vehicle equipment) can be
found:
R printed in yellow on the rim of the
emergency/collapsible spare wheel
R in the "Wheel and tire combinations"
section ( Y page 295) in this manual
R on the Tire and Loading Information placard
on the B-pillar on the driver's side.
If the tire pressure is not set correctly, this
can lead to an excessive build up of heat and
a sudden loss of pressure.
For further information, consult a qualified
specialist workshop, e.g. an authorized
Mercedes-Benz Center.
Important notes on tire pressure
GWARNING
Should the tire pressure drop repeatedly:
R check the tire for foreign bodies.
R check whether the wheel is losing air or the
valve is leaking.
R make sure that only a valve cap approved
by Mercedes-Benz is used on the tire valve.
Tire pressures that are too low have a
negative effect on vehicle safety, which could
lead you to cause an accident.
To test tire pressure, use a suitable tire
pressure gauge. The outer appearance of a
tire does not permit any reliable conclusion
about the tire pressure. On vehicles equipped
with the electronic tire pressure monitoring
system, the tire pressure can be checked
using the on-board computer.
The tire temperature and pressure increase
when the vehicle is in motion. This is
dependent on the driving speed and the load.
Therefore, you should only correct tire
pressures when the tires are cold.
The tires are cold:
R if the vehicle has been parked without
direct sunlight on the tires for at least three
hours and
R if the vehicle has not been driven more than
1 mile (1.6 km).
The tire temperature changes depending on
the outside temperature, the vehicle speed
and the tire load. If the tire temperature
changes by 18 ‡ (10 † ), the tire pressure
changes by approximately 10 kPa (0.1 bar/
1.5 psi). Take this into account when
checking the pressure of warm tires and only
correct the tire pressure if it is too low for the
current operating conditions. If you check the
tire pressure when the tires are warm, the
resulting value will be higher than if the tires
were cold. This is normal. Do not reduce the
tire pressure to the value specified for cold
tires. The tire pressure would otherwise be
too low.
Observe the recommended tire pressures for
cold tires
R on the Tire and Loading Information placard
on the B-pillar on the driver's side,
R in the tire pressure table on the inside of
the fuel filler flap,
R printed in yellow on the rim of the
emergency/collapsible spare wheel
(depending on vehicle equipment).
Underinflated or overinflated tires
Underinflated tires
GWARNING
Follow recommended tire inflation pressures.
Do not underinflate tires. Underinflated tires
wear excessively and/or unevenly, adversely
affect handling and fuel economy, and are
more likely to fail from being overheated.
Underinflated tires can:
R wear excessively and/or unevenly
R adversely affect fuel economy
Tire pressure275Wheels and tiresZ