2012 MERCEDES-BENZ GLK SUV engine

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variations are pos-
sible. Note that your vehicle may not be
equipped with all of the functions descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 27). Running-in notes
Important safety notes
New brake pads/brake pads and discs that
have been replaced only achieve optimum
braking effect after several hundred kilome-
tres of driving. Compensate for the reduced
braking effect by applying greater force to the
brake pedal. The first 1,500 km
If you treat the engine with sufficient care
from the very start, you will be rewarded with
excellent performance for the remainder of
the engine's life.
R Drive at varying vehicle speeds and engine
speeds for the first 1,500 km.
R Avoid overstraining the vehicle during this
period, e.g. driving at full throttle.
R Change gear in good time, before the rev
counter needle is Ôof the way to the red
area of the rev counter.
R Do not shift down a gear manually in order
to brake. Vehicles with automatic transmission:
R Try to avoid depressing the accelerator
pedal beyond the point of resistance (kick-
down).
R The shift ranges 3,2or 1should only be
engaged when driving slowly, e.g. when
driving in mountainous terrain.
After 1,500 km, you may gradually accelerate
the vehicle to full road and engine speeds.
i You should also observe these notes on
running in if the engine or parts of the drive
train on your vehicle have been replaced. Driving
Important safety notes
G
WARNING
Objects in the driver's footwell can restrict the
pedal travel or obstruct a depressed pedal.
The operating and road safety of the vehicle
is jeopardised. There is a risk of an accident.
Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Fit the floormats
securely and as specified in order to ensure
sufficient clearance for the pedals. Do not use
loose floormats. G
WARNING
Unsuitable footwear can hinder correct usage
of the pedals, e.g.:
R shoes with thick soles
R shoes with high heels
R slippers
There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals. G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect,
for example, the power steering and the brake 146
DrivingDriving and parking

boosting effect. You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving. G
WARNING
If the parking brake has not been fully
released when driving, the parking brake can:
R overheat and cause a fire
R lose its hold function.
There is a risk of fire and an accident. Release
the parking brake fully before driving off.
! Warm up the engine quickly. Do not use
the engine's full performance until it has
reached operating temperature.
Only set the automatic transmission to the
respective drive positions when the vehicle
is stationary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery
roads. Otherwise, you could damage the
drive train. Key positions
Key g
To remove the key
1 Power supply for some consumers, such
as the windscreen wipers
2 Ignition (power supply for all consumers)
and drive position
3 To start the engine The steering wheel is locked when the key is
removed from the ignition lock.
i
If the key does not belong to the vehicle,
it can still be turned in the ignition lock.
However, the ignition will not be switched
on. The engine cannot be started.
KEYLESS-GO General notes
R
Do not keep the KEYLESS-GO key with:
-electronic devices, e.g. a mobile phone
or another key
- metallic objects, e.g. coins or metal film
- metallic objects, e.g. a metal case
This can affect the function of the key with
KEYLESS-GO.
Vehicles with KEYLESS-GO are equipped with
a key featuring an integrated KEYLESS-GO
function and a detachable Start/Stop button.
The Start/Stop button must be inserted in the
ignition lock and the key must be in the vehi-
cle.
Pressing the Start/Stop button several times
in succession corresponds to the different
key positions in the ignition lock. This is only
the case if you are not depressing the brake
pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately. Driving
147Driving and parking Z

X
Position 0: if Start/Stop button :has not
yet been pressed, this corresponds to the
key being removed from the ignition.
X Position 1: press Start/Stop button :.
You can now activate the windscreen wip-
ers, for example.
i If you then open the driver's door when in
this position, the power supply is deactiva-
ted.
X Position 2(ignition): press Start/Stop but-
ton :twice.
i The power supply is switched off again if:
R the driver's door is opened and
R you press Start/Stop button :once
when in this position
Removing the Start/Stop button
You can remove the Start/Stop button from
the ignition lock and start the vehicle as nor-
mal using the key.
i You do not have to remove the Start/Stop
button from the ignition lock when you
leave the vehicle. X
Remove Start/Stop button :from ignition
lock ;.
i When you insert Start/Stop button :
into ignition lock ;, the system needs
approximately 2 seconds' recognition time.
You can then use Start/Stop button :. Starting the engine
Important safety notes G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
! Do not depress the accelerator pedal
when starting the engine.
General notes i
Vehicles with a petrol engine: the cat-
alytic converter is preheated for up to
30 seconds after a cold start. The sound of
the engine may change during this time.
Automatic transmission X
Shift the transmission to position P.
The transmission position display in the
multifunction display shows P.
i You can also start the engine when the
transmission is in position N.
Starting procedure with the key i
To start the engine using the key instead
of KEYLESS-GO, pull the Start/Stop button
out of the ignition lock.
X To start a petrol engine: turn the key to
position 3(Ypage 147) in the ignition lock
and release it as soon as the engine is run-
ning.
X To start a diesel engine: turn the key to
position 2(Ypage 147) in the ignition lock.
The % preglow indicator lamp in the
instrument cluster lights up.
X When the preglow indicator lamp %
goes out, turn the key to position
3(Y page 147)and release it as soon as the
engine is running. 148
DrivingDriving and parking

i
You can start the engine without preglow
if the engine is warm.
Using KEYLESS-GO to start the engine G
WARNING
Your vehicle can be started using a valid KEY-
LESS-GO key. For this reason, children should
never be left 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.
i The Start/Stop button can be used to
start the vehicle manually without inserting
the key into the ignition lock. The key must
be in the vehicle and the Start/Stop button
must be inserted in the ignition lock. This
mode for starting the engine operates inde-
pendently of the ECO start/stop automatic
engine start function.
X Depress the brake pedal and keep it
depressed.
X To start a petrol engine: press the Start/
Stop button (Y page 147) once.
The engine starts.
X To start a diesel engine: press the Start/
Stop button (Y page 147) once.
Preglow is activated and the engine starts. Pulling away
Manual transmission X
Depress the brake pedal and keep it
depressed.
X Fully depress the clutch pedal.
X Shift to either first gear or reverse gear R.
X Release the parking brake (Y page 165).
X Release the brake pedal.
X Slowly release the clutch pedal and gently
depress the accelerator pedal.
! Change gear in good time and avoid spin-
ning the wheels. Otherwise, you could dam-
age the vehicle. i
Follow the shift recommendations in the
multifunction display for an economical
driving style (Y page 155).
i The vehicle locks centrally once you have
pulled away. The locking knobs in the doors
drop down.
You can open the doors from the inside at
any time.
You can also deactivate the automatic door
lock (Y page 241).
Automatic transmission G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor
R, the vehicle could pull away suddenly. There
is a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do
not simultaneously accelerate.
i It is only possible to shift the transmission
from position Pto the desired position if
you depress the brake pedal. Only then is
the parking lock released.
X Depress the brake pedal and keep it
depressed.
X Shift the transmission to position Dor R.
X Release the parking brake (Y page 165).
X Release the brake pedal.
X Carefully depress the accelerator pedal.
i The vehicle locks centrally once you have
pulled away. The locking knobs in the doors
drop down.
You can open the doors from the inside at
any time.
You can also deactivate the automatic door
lock (Y page 241).
i Upshifts take place at higher engine
speeds after a cold start. This helps the
catalytic converter to reach its operating
temperature more quickly. Driving
149Driving and parking Z

Hill start assist
Hill start assist helps you when pulling away
forwards or in reverse on an uphill gradient.
It holds the vehicle for a short time after you
have removed your foot from the brake pedal.
This gives you enough time to move your foot
from the brake pedal to the accelerator pedal
and depress it before the vehicle begins to
roll. G
WARNING
After a short time, hill start assist will no lon-
ger brake your vehicle and it could roll away.
There is a risk of an accident and injury.
Therefore, quickly move your foot from the
brake pedal to the accelerator pedal. Never
leave the vehicle when it is held by hill start
assist.
X Take your foot off the brake pedal.
The vehicle is then held for about a second.
X Pull away.
Hill start assist will not function if:
R you are pulling away on a level road or a
downhill gradient.
R on vehicles with automatic transmission,
the transmission is in position N.
R the parking brake is engaged.
R ESP ®
is malfunctioning. ECO start/stop function
Important safety notes G
WARNING
If the engine is switched off automatically and
you exit the vehicle, the engine is restarted
automatically. The vehicle may begin moving.
There is a risk of accident and injury.
If you wish to exit the vehicle, always turn off
the ignition and secure the vehicle against
rolling away. General notes The ECO start/stop function switches the
engine off automatically if the vehicle stops
moving.
When pulling away again, the engine starts
automatically. The ECO start/stop function
thereby helps you to reduce the fuel con-
sumption and emissions of your vehicle.
Every time you switch on the engine using the
key or the Start/Stop button, the ECO start/
stop function is activated.
The system is operational when the
¤
symbol is shown in green in the multifunction
display.
If not all conditions for automatic engine
switch-off are fulfilled (Y page 151), the
¤ symbol is shown in yellow in the multi-
function display.
If the ECO start/stop function has been man-
ually deactivated (Y page 150) or a malfunc-
tion has caused the system to be deactivated,
the ¤ symbol is not displayed.
Deactivating/activating the ECO start/
stop function ECO button
To deactivate
X
Press button :.
Indicator lamp ;on button :and the
¤ symbol in the multifunction display go
out. 150
DrivingDriving and parking

Activating
X
Press button :.
Indicator lamp ;lights up. If all conditions
for automatic engine switch-off
(Y page 151) are fulfilled, the ¤symbol
is shown in green in the multifunction dis-
play.
If not all conditions for automatic engine
switch-off are fulfilled, the
(Y page 151) ¤symbol is shown in yel-
low in the multifunction display. If this is the
case, the ECO start/stop function is not
available.
i If indicator lamp ;is off, the ECO start/
stop function has been deactivated man-
ually or as the result of a malfunction. The
engine will then not be switched off auto-
matically when the vehicle stops.
i The ECO start/stop function is activated
each time the engine is switched on.
Automatic engine switch-off The ECO start/stop function is operational
and the ¤symbol is displayed in green in
the multifunction display if:
R the indicator lamp in the ECO button is lit
green..
R the vehicle is stationary
R the outside temperature is within the com-
fort range.
R the engine is at normal operating temper-
ature.
R the set temperature for the vehicle interior
has been reached.
R the battery is sufficiently charged.
R the system detects that the windscreen is
not misted up when the air-conditioning
system is switched on.
R the bonnet is closed.
R the driver's door is closed and the driver's
seat belt is fastened.
If not all conditions for automatic engine
switch-off (Y page 151) are fulfilled, the ¤
symbol is shown in yellow in the multi-
function display.
i The engine can be switched off automat-
ically a maximum of four times (initial stop,
then three subsequent stops) in succes-
sion. The ¤symbol is shown in yellow
in the multifunction display after the engine
has been started automatically for the
fourth time. When the ¤symbol is
shown in green in the multifunction display,
automatic engine switch-off is again possi-
ble.
i During automatic engine switch-off, the
climate control system only operates at a
reduced capacity. If you require full climate
control capacity, the ECO start/stop func-
tion can be deactivated by pressing the
ECO button (Y page 150).
Vehicles with manual transmission The ECO start/stop function switches off the
engine automatically at low speeds.
X
Brake the vehicle until it comes to a stand-
still.
X Engage neutral N(Ypage 154) (follow
gearshift instruction :to engage neutral
N, if necessary).
X Release the clutch pedal.
The engine is switched off automatically.
Vehicles with automatic transmission
The ECO start/stop function switches the
engine off automatically if the vehicle is
braked to a standstill and the brake remains Driving
151Driving and pa rking Z

depressed with the transmission in position
D or N.
i If you shift the transmission from Rto D,
the ECO start/stop function is available
again once the ¤symbol reappears in
green in the multifunction display.
i You can also activate the HOLD function
when the vehicle is stationary if the engine
has been switched off automatically. It is
then not necessary to continue applying
the brakes during the automatic stop
phase. When you depress the accelerator
pedal, the engine starts automatically and
the braking effect of the HOLD function is
deactivated. Depress the accelerator pedal
gently, as the engine must be started first.
Automatic engine start The engine is started automatically if:
R you switch off the ECO start/stop function
by pressing the ECO button
R you unfasten your seat belt or open the
driver's door
R the vehicle starts to roll
R the brake system requires this
R the temperature in the vehicle interior devi-
ates from the set range
R the system detects moisture on the wind-
screen when the air-conditioning system is
switched on
R the battery's charge status is too low
Vehicles with manual transmission
The engine is started automatically if:
R you depress the clutch pedal
R you depress the accelerator pedal
! Only engage gear when the clutch pedal
is depressed. Vehicles with automatic transmission
The engine is started automatically if:
R
you release the brakes when in transmis-
sion position Dor N
R you depress the accelerator pedal
R you engage reverse gear R
R you move the transmission out of position
P
i Shifting the transmission to position P
does not start the engine.
i If you shift the transmission from Rto D,
the ECO start/stop function is available
again as soon as the ¤symbol reap-
pears in the multifunction display. 152
DrivingDriving and parking

Problems with the engine
Problem Possible causes/consequences and
M
MSolutions The engine does not
start. The starter motor
can be heard. R
There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.
X Turn the key back to position 0in the ignition lock before
attempting to start the engine again.
or
X Press the Start/Stop button repeatedly until all indicator lamps
in the instrument cluster go out.
X Try to start the engine again (Y page 148). Avoid excessively
long and frequent attempts to start the engine, as this will drain
the battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop. The engine does not
start. The starter motor
can be heard. The
reserve fuel warning
lamp is lit and the fuel
gauge display shows
0. The fuel tank is empty.
X
Refuel the vehicle. 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.
X
Jump-start the vehicle (Y page 341).
If the engine does not start despite attempts to jump-start it:
X Consult a qualified specialist workshop. The starter motor was exposed to a thermal load that was too high.
X
Allow the starter motor to cool down for approximately two
minutes.
X Try to start the engine again.
If the engine still does not start:
X Consult a qualified specialist workshop. Vehicles with a petrol
engine:
The engine is not run-
ning smoothly and is
misfiring. There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
X
Only depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it.
X Have the cause rectified immediately at a qualified specialist
workshop. Driving
153Driving and parking Z