ignition MERCEDES-BENZ GLK SUV 2012 Owners Manual

X
Switch on the hazard warning lamps
(Y page 114).
X Fit the towing eye (Y page 343).
X Secure the rigid towing bar or the towing
rope.
X Depress and hold the brake pedal.
X Turn the key to position 2in the ignition
lock.
X Depress the clutch pedal and keep it
depressed.
X Engage neutral.
X Release the brake pedal.
X Tow-start the vehicle.
X Engage second gear.
X Release the clutch pedal slowly; do not
depress the accelerator pedal while doing
so.
The engine is started.
X Depress the clutch pedal and shift to neu-
tral.
X Stop at a suitable place.
X Depress the parking brake.
X Remove the rigid towing bar or towing rope.
X Remove the towing eye (Y page 344).
X Switch off the hazard warning lamps. Electrical fuses
Important safety notes
G
WARNING
Only use fuses that have been approved for
Mercedes-Benz vehicles and which have the
correct fuse rating for the systems con-
cerned. Do not attempt to repair or bridge
faulty fuses. Using fuses which have not been
approved or attempting to repair or bridge
faulty fuses could cause the fuse to be over-
loaded and result in a fire. Have the cause
traced and rectified at a qualified specialist
workshop.
! Only use fuses that have been approved
for Mercedes-Benz vehicles and which have the correct fuse rating for the system
concerned. Otherwise, components or sys-
tems could be damaged.
The fuses in your vehicle serve to disconnect
faulty circuits. If a fuse blows, all the compo-
nents on the circuit and their functions will
fail.
Blown fuses must be replaced with fuses of
the same rating, which you can recognise by
the colour and fuse rating. The fuse ratings
are listed in the fuse allocation chart.
If the newly inserted fuse also blows, have the
cause traced and rectified at a qualified spe-
cialist workshop, e.g. a Mercedes-Benz
Service Centre. Before replacing a fuse
X Secure the vehicle against rolling away
(Y page 164).
X Switch off all electrical consumers.
X Turn the key to position 0in the ignition
lock and remove it (Y page 147).
or
X On vehicles with KEYLESS-GO, make sure
the ignition is switched off (Y page 147).
All indicator lamps in the instrument cluster
must be off.
The fuses are located in various fuse boxes:
R fuse box on the driver's side of the dash-
board
R fuse box in the engine compartment on the
left-hand side of the vehicle, when viewed
in the direction of travel
R fuse box in the stowage well under the lug-
gage compartment floor on the right-hand
side of the vehicle, when viewed in the
direction of travel
The fuse allocation chart is located in the
vehicle tool kit in the stowage compartment
under the luggage compartment floor
(Y page 327). 346
Electrical fusesBreakdown assistance

Tyre pressure loss warning system
Important safety notes While the vehicle is in motion, the tyre pres-
sure loss warning system monitors the set
tyre pressure using the rotational speed of
the wheels. This enables the system to detect
significant pressure loss in a tyre. If the speed
of rotation of a wheel changes as a result of
a loss of pressure, a corresponding warning
message will appear in the multifunction dis-
play.
The tyre pressure warning system does not
warn you of an incorrectly set tyre pressure.
Observe the notes on the recommended tyre
pressure (Y page 353).
The tyre pressure loss warning system does
not replace the need to regularly check your
vehicle's tyre pressures, since an even loss of
pressure on several tyres at the same time
cannot be detected by the tyre pressure loss
warning system.
The tyre pressure monitor is not able to warn
you of a sudden loss of pressure, e.g. if the
tyre is penetrated by a foreign object. In the
event of a sudden loss of pressure, bring the
vehicle to a halt by braking carefully. Avoid
abrupt steering manoeuvres.
The function of the tyre pressure loss warning
system is limited or delayed if:
R snow chains are fitted to your vehicle's
tyres.
R road conditions are wintry.
R you are driving on sand or gravel.
R you adopt a very sporty driving style (cor-
nering at high speeds or driving with high
rates of acceleration).
R you are towing a very heavy or large trailer.
R you are driving with a heavy load (in the
vehicle or on the roof). Restarting the tyre pressure loss warn-
ing system Restart the tyre pressure loss warning system
if you have:
R
changed the tyre pressure
R changed the wheels or tyres
R fitted new wheels or tyres
X Before restarting, consult the table of tyre
pressures on the inside of the fuel filler flap
to ensure that the tyre pressure in all four
tyres is set correctly for the respective
operating conditions.
The tyre pressure loss warning system can
only give reliable warnings if you have set
the correct tyre pressure. If an incorrect
tyre pressure is set, these incorrect values
will be monitored.
X Observe the notes in the section on tyre
pressures (Y page 353).
Restarting using the 4-button multifunc-
tion steering wheel
X Make sure that the key is in position 2in
the ignition lock.
X Press the Vbutton to select Tyre
Tyre
pressure Menu: R pressure Menu: R.
X Press the Cbutton.
The RFI active Restart: R
RFI active Restart: R message
appears in the multifunction display.
X Press the Cbutton.
The Tyre
Tyre press.
press. OK?
OK?message appears in
the multifunction display.
If you wish to confirm the restart:
X Press the Wbutton.
The Run Flat Indicator restarted Run Flat Indicator restarted
message appears in the multifunction dis-
play.
After a teach-in period, the tyre pressure
loss warning system will monitor the set
tyre pressures of all four tyres.
or Tyre pressure
355Wheels and tyres Z

If you wish to cancel the restart:
X
Press the Xbutton.
The tyre pressure values stored at the last
restart will continue to be monitored.
Restarting using the 12-button multifunc-
tion steering wheel
X Make sure that the key is in position 2in
the ignition lock.
X Press the =or; button to select the
Service
Service menu.
X Press the 9or: button to select
Tyre pressure Tyre pressure .
X Press the abutton.
The Run Flat Indicator active
Run Flat Indicator active
Restart
Restart with
withOK
OKmessage appears in the
multifunction display.
If you wish to confirm the restart:
X Press the abutton.
The Tyre press. now OK? Tyre press. now OK? message
appears in the multifunction display.
X Press the 9or: button to select
Yes
Yes.
X Press the abutton.
The Run Flat Indicator restarted
Run Flat Indicator restarted
message appears in the multifunction dis-
play.
After a teach-in period, the tyre pressure
loss warning system will monitor the set
tyre pressures of all four tyres.
or
If you wish to cancel the restart:
X Press the %button.
or
X If the Tyre press. now OK?
Tyre press. now OK? message
appears, use the 9or: button to
select Cancel
Cancel .
X Press the abutton.
The tyre pressure values stored at the last
restart will continue to be monitored. Changing a wheel
Flat tyre
The "Breakdown assistance" section
(Y page 329) contains information and notes
on how to deal with a flat tyre. It also provides
instructions on changing a wheel or fitting the
spare wheel/emergency spare wheel. Interchanging the wheels
G
WARNING
Interchanging the front and rear wheels may
severely impair the driving characteristics if
the wheels or tyres have different dimensions.
The wheel brakes or suspension components
may also be damaged. There is a risk of acci-
dent.
Interchange front and rear wheels only if the
wheels and tyres are of the same dimensions.
Interchanging the front and rear wheels of
differing dimensions can render the general
operating permit invalid.
Always pay attention to the instructions and
safety notices in the section on "Wheel
changing and spare wheel fitting"
(Y page 332).
The wear patterns on the front and rear tyres
differ, depending on the operating conditions.
Interchange the wheels before a clear wear
pattern has formed on the tyres. Front tyres
typically wear more on the shoulders and the
rear tyres in the centre.
On vehicles that have the same size front and
rear wheels, you can interchange the wheels
every 5,000km to 10,000 km depending on
the degree of tyre wear. Maintain the direc-
tion of tyre rotation.
Clean the contact surfaces of the wheel and
the brake disc thoroughly every time a wheel
is interchanged. Check the tyre pressure and,
if necessary, restart the tyre pressure loss
warning system or the tyre pressure monitor. 356
Changing a wheelWheels and tyres