engine MERCEDES-BENZ GLK-CLASS SUV 2015 Repair Manual

program appears in the multifunction dis-
play.
Steering wheel paddle shifters
:Left-hand steering wheel paddle shifter
;Right-hand steering wheel paddle shifter
In the manual drive program, you can change
gear yourself by using the steering wheel pad- dle shifters ( Y page 160).
iYou can only change gear with the steer-
ing wheel paddle shifters when the trans-
mission is in position D.
Automatic drive program
Drive program E is characterized by the fol-
lowing:
R comfort-oriented engine and automatic
transmission settings.
R optimal fuel consumption resulting from
the automatic transmission shifting up
sooner.
R the vehicle pulling away more gently in
forward and reverse gears, unless the
accelerator pedal is depressed fully.
R increased sensitivity. This improves driving
stability on slippery road surfaces, for
example.
R the automatic transmission shifting up
sooner. This results in the vehicle being
driven at lower engine speeds and the
wheels being less likely to spin. Drive program
S is characterized by the fol-
lowing:
R sporty engine and automatic transmission
settings.
R the vehicle pulling away in first gear.
R the automatic transmission shifting up
later.
R the fuel consumption possibly being higher
as a result of the later automatic transmis-
sion shift points.
Manual drive program M
General notes
In this drive program, you can briefly change
gear yourself by using the steering wheel pad-
dle shifters. The transmission must be in posi- tion D.
You can activate manual drive program M in
the E and S automatic drive programs.
Activating X Shift the transmission to position D.
X Pull the left or right steering wheel paddle
shifter ( Y page 160).
Manual drive program M is temporarily acti-
vated. The selected gear and M appear in
the multifunction display.
Shifting gears
If you pull on the left or right steering wheel
paddle shifter, the automatic transmission
switches to manual drive program M for a
limited amount of time. Depending on which
paddle shifter is pulled, the automatic trans-
mission immediately shifts into the next gear down or up, if permitted.
X To shift up: pull the right-hand steering
wheel paddle shifter ( Y page 160).
The automatic transmission shifts up to the
next gear.
iIf the maximum engine speed on the cur-
rently engaged gear is reached and you
continue to accelerate, the automatic
160Automatic transmission
Driving and parking

transmission automatically shifts up in
order to prevent engine damage.
X To shift down: pull on the left-hand steer-
ing wheel paddle shifter ( Y page 160).
The automatic transmission shifts down to the next gear.
iIf the engine exceeds the maximum
engine speed when shifting down, the auto- matic transmission protects against engine
damage by not shifting down.
iAutomatic down shifting occurs when
coasting.
Shift recommendation
The gearshift recommendations assist you in
adopting an economical driving style. The rec- ommended gear is shown in the multifunction
display.
X Shift to recommended gear ; according
to gearshift recommendation : when
shown in the multifunction display of the
instrument cluster.
Deactivating
If you have activated manual drive program
M , it will remain active for a certain amount of
time. Under certain conditions the minimum
amount of time is extended, e.g. in the case of lateral acceleration, during an overrun phase
or when driving on steep terrain.
If manual drive program M has been deacti-
vated, the automatic transmission shifts into
the automatic drive program that was last
selected, i.e. E or S. You can also deactivate manual drive pro-
gram
M yourself:
X Pull on the right-hand steering wheel pad-
dle shifter and hold it in place ( Y page 160).
or X Use the DIRECT SELECT lever to switch the
transmission position.
or
X Use the program selector button to change
the drive program ( Y page 159).
Manual drive program M is deactivated.
The automatic transmission switches into
the automatic drive program that was last
selected, i.e. E or S.
Automatic transmission161
Driving and parking
Z

Problems with the transmission
ProblemPossible causes/consequences and M Solutions
The transmission has
problems shifting gear.The transmission is losing oil.
X Have the transmission checked at a qualified specialist work-
shop immediately.
The acceleration ability
is deteriorating.
The transmission no
longer changes gear.The transmission is in emergency mode.
It is only possible to shift into second gear and reverse gear.
X Stop the vehicle.
X Shift the transmission to position P.
X Switch off the engine.
X Wait at least ten seconds before restarting the engine.
X Shift the transmission to position D or R.
If D is selected, the transmission shifts into second gear; if R is
selected, the transmission shifts into reverse gear.
X Have the transmission checked at a qualified specialist work-
shop immediately.
Transfer case
This section is only valid for vehicles with 4-
wheel drive (4MATIC). Power is always trans-
mitted to both axles.
! Performance tests may only be carried
out on a 2-axle dynamometer. The brake
system or transfer case could otherwise be
damaged. Contact a qualified specialist
workshop for a performance test.
! 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 dam-
aged.
! Vehicles with 4MATIC must not be towed
with either the front or the rear axle raised,
as doing so will damage the transmission.
Refueling
Important safety notes
GWARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is a risk of fire and explo-
sion.
You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable, the auxiliary heating before refueling.
GWARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make sure that fuel does not comeinto contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
162Refueling
Driving and parking

If you or others come into contact with fuel,
observe the following:R Wash away fuel from skin immediately
using soap and water.
R If fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance with-
out delay.
R If fuel is swallowed, seek medical assis-
tance without delay. Do not induce vomit-
ing.
R Immediately change out of clothing which
has come into contact with fuel.
GWARNING
Electrostatic buildup can create sparks and
ignite fuel vapors. There is a risk of fire and
explosion.
Always touch the vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildup is
thereby discharged.
GWARNING
Vehicles with a diesel engine:
If you mix diesel fuel with gasoline, the flash
point is lower than that of pure diesel fuel.
When the engine is running, exhaust system
components could overheat without being
noticed. There is a risk of fire.
Never refuel with gasoline. Never mix gasoline with diesel fuel.
! Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the igni-
tion if you accidentally refuel with the
wrong fuel. Otherwise, the fuel will enter
the fuel system. Even small amounts of the wrong fuel could result in damage to the
fuel system and the engine. Notify a quali-
fied specialist workshop and have the fuel
tank and fuel lines drained completely.
! Do not use gasoline to refuel vehicles with
a diesel engine. Do not switch on the igni-
tion if you accidentally refuel with the wrong fuel. Otherwise, the fuel will enter
the fuel system. Even small amounts of the
wrong fuel could result in damage to the
fuel system and the engine. The repair
costs are high. Notify a qualified specialist
workshop and have the fuel tank and fuel
lines drained completely.
! Overfilling the fuel tank could damage the
fuel system.
! Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
! 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.
Do not get into the vehicle again during the
refueling process. Otherwise, electrostatic
charge could build up again.
If you overfill the fuel tank, fuel could spray
out when the fuel pump nozzle is removed.
For further information on fuel and fuel quality ( Y page 373).
For further information on fuel and fuel qual-
ity, see the separate operating instructions.
Refueling
General information
The fuel filler flap is unlocked or locked auto-
matically when you open or close the vehicle with the SmartKey or with KEYLESS-GO.
The position of the 8 fuel filler cap is dis-
played in the instrument cluster. The arrow
next to the filling pump indicates the side of
the vehicle.
Refueling163
Driving and parking
Z

Opening the fuel filler flap
:To open the fuel filler flap
;To insert the fuel filler cap
=Tire pressure table
?Fuel type to be used
X Switch the engine off.
X Remove the SmartKey from the ignition
lock.
X KEYLESS-GO: open the driver’s door.
This corresponds to SmartKey position 0:
"SmartKey removed".
The driver’s door can be closed again.
X Press the fuel filler flap in the direction of
arrow :.
The fuel filler flap opens slightly.
X Open the fuel filler flap fully.
X Turn the fuel filler cap counterclockwise
and remove it.
X Insert the fuel filler cap into the holder
bracket on the inside of fuel filler flap ;.
X Completely insert the filler neck of the fuel
pump nozzle into the tank, hook in place
and refuel.
X Only fill the tank until the pump nozzle
switches off.
iVehicles with a diesel engine: the filler
neck is designed for refueling at diesel fill-
ing pumps.
iDo not add any more fuel after the pump
stops filling for the first time. Otherwise,
fuel may leak out.
Closing the fuel filler flap
X Replace the cap on the filler neck and turn
clockwise until it engages audibly.
X Close the fuel filler flap.
iClose the fuel filler flap before locking the
vehicle.
iIf you are driving with the fuel filler cap
open, the 8 reserve fuel warning lamp
flashes. A message appears in the multi-
function display ( Y page 248).
In addition, the ; Check Engine warning
lamp may light up ( Y page 267).
For further information on warning and indi- cator lamps in the instrument cluster, see
( Y page 267).
164Refueling
Driving and parking

Problems with fuel and the fuel tank
ProblemPossible causes/consequences and M Solutions
Fuel is leaking from the
vehicle.The fuel line or the fuel tank is faulty.
GWARNING
Risk of explosion or fire.
X Turn the SmartKey to position 0 immediately and remove it
( Y page 149).
X Do not restart the engine under any circumstances.
X Consult a qualified specialist workshop.
The engine does not
start.The fuel tank of a vehicle with a diesel engine has been run com-
pletely dry.
X Refuel the vehicle with at least 5.3 US qt (5 liters) of diesel.
X Turn the ignition on for approximately ten seconds
(Y page 149).
X Start the engine continuously for up to ten seconds unt il it runs
smoothly.
If the engine does not start: X Turn the ignition on again for approximately ten seconds
(Y page 149).
X Start the engine again continuously for up to ten seco nds until it
runs smoothly.
If the engine does not start after three attempts:
X Consult a qualified specialist workshop.
The fuel filler flap can-
not be opened.The fuel filler flap is not unlocked.
X Unlock the vehicle ( Y page 78).
The SmartKey battery is discharged or nearly discharged.
X Unlock the vehicle using the mechanical key ( Y page 80).
The fuel filler flap is unlocked, but the opening mecha nism is jam-
med.
X Consult a qualified specialist workshop.
DEF (BlueTEC vehicles only)
Important notes on use
To function properly, BlueTEC exhaust gas
aftertreatment must be operated with the
reducing agent DEF. Adding DEF is one of the tasks performed during maintenance. Under
normal operating conditions, a tank of DEF
lasts until the next service due date.
When the supply of DEF is almost used up, theCheck Additive See Operator's Manual
Refueling165
Driving and parking
Z

message is shown in the multifunction dis-
play.
When the DEF supply drops to a minimum, the
Remaining Starts: 16 message is shown
in the multifunction display.
If the
Remaining Starts: 16 message
appears in the multifunction display, you can start the engine another 16 times. If DEF is
not refilled, you will subsequently be unable
to start the engine . Refill the DEF tank with
around 1 gal (3.8 l) of DEF or have the DEF
tank refilled at a qualified specialist work-
shop.
Use the special DEF refill bottle when adding DEF between maintenance intervals. Contact
a qualified specialist workshop with any ques-
tions or, if necessary, contact Roadside Assis- tance ( Y page 24).
If the outside temperature is below 12 ‡
( Ò 11 †) it may be difficult to top up. If DEF is
frozen and there is an active warning indica-
tor, it may not be possible to add DEF. Park
the vehicle in a warmer place, e.g. in a garage,
until DEF has become fluid again. It will then
be possible to add DEF again. Alternatively,
have the DEF tank refilled at a qualified spe-
cialist workshop.
Further information about BlueTEC exhaust
gas aftertreatment and DEF is available at any authorized Mercedes-Benz Center.
Important safety notes
DEF is a water-soluble fluid for the exhaust
gas aftertreatment of diesel engines. It is:
R not poisonous
R colorless and odorless
R not flammable
When you open the DEF container, small
amounts of ammonia vapor may be released. Ammonia vapors have a pungent odor and are
particularly irritating to the skin, to mucous
membranes and to the eyes. You may expe-
rience a burning sensation in your eyes, nose and throat. Coughing and watering of the
eyes are possible. Do not inhale ammonia vapors. Fill the DEF
tank only in well-ventilated areas.
DEF must not come into contact with your
skin, eyes or clothing and must not be swal-
lowed. Keep DEF away from children.
If you or other persons come into contact with
DEF, observe the following:
R Rinse DEF from your skin immediately with
soap and water.
R If DEF comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance with-
out delay.
R If DEF has been swallowed, rinse your
mouth out immediately. Drink plenty of
water. Seek medical assistance without
delay.
R Change out of clothing contaminated with
DEF immediately.
! Only use DEF in accordance with
ISO 22241. Do not mix any additives with
DEF, and do not dilute DEF with water. This
may destroy the BlueTEC exhaust gas after- treatment system.
! Rinse surfaces that have come into con-
tact with DEF immediately with water or
remove DEF using a damp cloth and cold
water. If the DEF has already crystallized,
use a sponge and cold water to clean it. DEF
residues crystallize after time and contam-
inate the affected surfaces.
! DEF is not a fuel additive and must not be
added to the fuel tank. If DEF is added to
the fuel tank, this can lead to engine dam-
age.
! Only screw on the DEF refill bottle hand-
tight. It could otherwise be damaged.
The DEF filler neck is under the cargo com-
partment floor.
X Switch the ignition off.
X Open the tailgate.
X Lift up the cargo compartment floor
(Y page 314).
166Refueling
Driving and parking

Parking
Important safety notes
GWARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact withhot parts of the exhaust system or exhaust
gas flow. There is a risk of fire.
Park the vehicle so that no flammable mate-
rials come into contact with parts of the vehi- cle which are hot. Take particular care not to
park on dry grassland or harvested grain
fields.
GWARNING
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
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.
GWARNING
If you leave children unsupervised in the vehi- cle, they could set it in motion by, for example:
R release the parking brake.
R shift the automatic transmission out of the
parking position P.
R start the engine.
In addition, they may operate vehicle equip-
ment and become trapped. 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 unsupervised in the vehicle.
! Always secure the vehicle correctly
against rolling away. Otherwise, the vehicle
or its drivetrain could be damaged. To ensure that the vehicle is secured against
rolling away unintentionally:
R the parking brake must be applied.
R the transmission must be in position P and
the SmartKey must be removed from the
ignition lock.
R the front wheels must be turned towards
the curb on steep uphill or downhill gradi-
ents.
Switching off the engine
Important safety notes
GWARNING
The automatic transmission switches to neu-
tral position N when you switch off the engine.
The vehicle may roll away. There is a risk of an
accident.
After switching off the engine, always switch
to parking position P. Prevent the parked vehi-
cle from rolling away by applying the parking
brake.
Vehicles with automatic transmission
X Apply the parking brake firmly.
X Shift the transmission to position P.
Using the SmartKey
X Turn the SmartKey to position 0 in the igni-
tion lock and remove it.
The immobilizer is activated.
iThe SmartKey can only be removed if the
transmission is in position P.
Using KEYLESS-GO X Press the Start/Stop button ( Y page 149).
The engine stops and all the indicator
lamps in the instrument cluster go out.
iWhen the driver's door is closed, this cor-
responds to key position 1. When the driv-
er's door is open, this corresponds to key
position 0: "Key removed".
168Parking
Driving and parking

iIn the event of an emergency, the engine
can be turned off while the vehicle is in
motion by pressing and holding the Start/
Stop button for three seconds.
Parking brake
GWARNING
If you must brake the vehicle with the parking brake, the braking distance is considerably
longer and the wheels could lock. There is an
increased danger of skidding and accidents.
Only use the parking brake to brake the vehi-
cle when the service brake is faulty. Do not
apply the parking brake too firmly. If the
wheels lock, release the parking brake until
the wheels begin turning again.
GWARNING
If you leave children unsupervised in the vehi- cle, they could set it in motion by, for example:
R release the parking brake.
R shift the automatic transmission out of the
parking position P.
R start the engine.
In addition, they may operate vehicle equip-
ment and become trapped. 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 unsupervised in the vehicle.
If you brake the vehicle with the parking
brake, the brake lamps will not light up.
X To apply: depress parking brake ; firmly.
When the engine is running, the $ (USA
only) or J (Canada only) indicator lamp
lights up in the instrument cluster.
X To release: depress the brake pedal and
keep it depressed.
X Pull release handle :.
When the ignition is switched on or the
engine is running, the $ (USA only) or
J (Canada only) indicator lamp goes out
in the instrument cluster.
Parking the vehicle for a long period
If you leave the vehicle parked for longer than
four weeks, the battery may be damaged by
exhaustive discharging.
If you leave the vehicle parked for longer than six weeks, the vehicle may suffer damage as a
result of lack of use. X Visit a qualified specialist workshop and
seek advice.
iYou can obtain information about trickle
chargers from a qualified specialist work-
shop.
Driving tips
General driving tips
Important safety notes
GWARNING
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
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.
GWARNING
If you operate mobile communication equip-
ment while driving, you will be distracted from
Driving tips169
Driving and parking
Z

traffic conditions. You could also lose controlof the vehicle. There is a risk of an accident.
Only operate this equipment when the vehicle is stationary.
Observe the legal requirements for the coun- try in which you are driving. Some jurisdic-
tions prohibit the driver from using a mobile
phone while driving a vehicle.
If you make a call while driving, always use
hands-free mode. Only operate the telephone when the traffic situation permits. If you are
unsure, pull over to a safe location and stop
before operating the telephone.
Bear in mind that at a speed of only 30 mph
(approximately 50 km/h), the vehicle covers
a distance of 44 ft (approximately 14 m) per
second.
Drive sensibly – save fuel
Observe the following tips to save fuel:
X The tires should always be inflated to the
recommended tire pressure.
X Remove unnecessary loads.
X Remove roof racks when they are not nee-
ded.
X Warm up the engine at low engine speeds.
X Avoid frequent acceleration or braking.
X Have all maintenance work carried out as
indicated by the service intervals in the
Maintenance Booklet or by the service
interval display.
Fuel consumption also increases when driv-
ing in cold weather, in stop-start traffic and in
hilly terrain.
Drinking and driving
GWARNING
Drinking and driving and/or taking drugs and driving are very dangerous combinations.
Even a small amount of alcohol or drugs can
affect your reflexes, perceptions and judg-
ment.
The possibility of a serious or even fatal acci-dent is greatly increased when you drink or
take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or tak-
ing drugs.
Emission control
GWARNING
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.
Certain engine systems are designed to keep
the level of poisonous components in exhaust fumes within legal limits.
These systems only work at peak efficiency if they are serviced exactly in accordance with
the manufacturer's specifications. For this
reason, all work on the engine must be carried
out by qualified and authorized Mercedes-
Benz technicians.
The engine settings must not be changed
under any circumstances. Furthermore, all
specific service work must be carried out at
regular intervals and in accordance with the
Mercedes-Benz service requirements. Details can be found in the Maintenance Booklet.
ECO display
The ECO display provides feedback on how
economical your driving characteristics are.
The ECO display assists you in achieving the
most economical driving style for the selec-
ted settings and prevailing conditions. Your
driving style can significantly influence the
vehicle's consumption.
170Driving tips
Driving and parking