light MERCEDES-BENZ GLC SUV 2015 Service Manual

If ESP
®
detects that the vehicle is deviating
from the direction desired by the driver, one
or more wheels are braked to stabilise the
vehicle. The engine output is also modified to keep the vehicle on the desired course within
physical limits. ESP ®
assists the driver when
pulling away on wet or slippery roads. ESP ®
can also stabilise the vehicle during braking.
4ETS (Electronic Traction System) i
Observe the "Important safety notes" sec-
tion (Y page 78).
4ETS traction control is part of ESP ®
.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
away and accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is trans-
ferred to the wheel or wheels with traction.
Traction control remains active if you deacti-
vate ESP ®
.
Off-road 4ETS (Electronic Traction Sys-
tem) A 4ETS system specifically suited to off-road
terrain is activated automatically once the off- road program is activated (Y page 250).
Off-road ESP ® An ESP
®
system specifically suited to off-road
terrain is activated automatically once the off-
road program is activated (Y page 250).
The off-road ESP ®
intervenes with a delay if
there is oversteering or understeering, thus
improving traction.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 78). G
WARNING
If ESP ®
is malfunctioning, ESP ®
is unable to
stabilise the vehicle. In addition, other driving safety systems are switched off. This increa-
ses the risk of skidding and an accident.
Drive on carefully. Have ESP
®
checked at a
qualified specialist workshop.
If the å ESP®
OFF warning lamp lights up
continuously, ESP ®
is deactivated.
If the ÷ ESP®
warning lamp lights up con-
tinuously, ESP ®
is not available due to a mal-
function.
Observe the information on warning lamps
(Y page 381) and display messages which
may be shown in the instrument cluster
(Y page 336).
Only use wheels with the recommended tyre
sizes. Only then will ESP ®
function properly.
Characteristics of ESP ® General notes
If the
÷ ESP warning lamp goes out before
beginning the journey, ESP ®
is automatically
active.
If ESP ®
intervenes, the ÷ESP®
warning
lamp flashes in the instrument cluster.
If ESP ®
intervenes:
X Do not deactivate ESP ®
under any circum-
stances.
X When pulling away, only depress the accel-
erator pedal as far as is necessary.
X Adapt your driving style to suit the prevail-
ing road and weather conditions.
ECO start/stop function
The ECO start/stop function switches the
engine off automatically if the vehicle stops
moving. When pulling away again, the engine starts automatically. ESP ®
remains in its pre-
viously selected status. Example:if ESP®
was deactivated before the engine was
switched off, ESP ®
remains deactivated when
the engine is switched on again. Driving safety systems
85Safety Z

Deactivating/activating ESP
®Important safety notes
i Observe the "Important safety notes" sec-
tion (Y page 78).
You can select between the following sta-
tuses of ESP ®
:
R ESP ®
is activated
R ESP ®
is deactivated G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilises the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP ®
in the situations descri-
bed in the following.
It may be best to deactivate ESP ®
in the fol-
lowing situations:
R when using snow chains
R in deep snow
R on sand or gravel
R when driving off-road (vehicles without off-
road program)
Activate ESP ®
as soon as the situations
described above no longer apply. ESP ®
will
otherwise not be able to stabilise the vehicle if the vehicle starts to skid or a wheel starts to
spin.
Deactivating/activating ESP ®X
To deactivate: press button:.
The å ESP®
OFF warning lamp in the
instrument cluster lights up. X
To activate: press button :.
The å ESP®
OFF warning lamp in the
instrument cluster goes out.
Characteristics when ESP ®
is deactivated
If ESP ®
is deactivated and one or more wheels
start to spin, the ÷ESP®
warning lamp in
the instrument cluster flashes. In such situa-
tions, ESP ®
will not stabilise the vehicle.
If you deactivate ESP ®
:
R ESP ®
no longer improves driving stability
R engine torque is no longer limited and the
drive wheels are able to spin
The spinning of the wheels results in a cut-
ting action for better traction on loose sur- faces.
R Traction control is still activated
R COLLISION PREVENTION ASSIST is no lon-
ger available; nor is it activated if you brake
firmly with assistance from ESP ®
R PRE-SAFE ®
is no longer available; it is also
not activated if you brake firmly with assis-
tance from ESP ®
R PRE-SAFE ®
Brake is no longer available; it
is also not activated if you brake firmly with
assistance from ESP ®
R ESP ®
still provides support when you brake
firmly
ESP ®
trailer stabilisation General notes
If your vehicle/trailer combination begins to
lurch, ESP
®
assists you in this situation. ESP ®
slows the vehicle down by braking and limit-
ing the engine output until the vehicle/trailer combination has stabilised.
Important safety notes G
WARNING
If road and weather conditions are poor,
trailer stabilisation will not be able to prevent the vehicle/trailer combination from swerv-
ing. Trailers with a high centre of gravity can 86
Driving safety syste
msSafety

R
darkness
R if:
- pedestrians move quickly, e.g. into the
path of the vehicle
- the camera system no longer detects a
pedestrian as a person due to special
clothing or other objects
- a pedestrian is concealed by other
objects
- the typical outline of a person is not dis-
tinguishable from the background
Following damage to the front end of the vehi-
cle, have the radar sensor settings and oper- ation checked at a qualified specialist work-
shop. This also applies to collisions at slow
speeds where there is no visible damage to
the front of the vehicle.
Following damage to the windscreen, have
the configuration and operation of the cam-
era system checked at a qualified specialist
workshop.
Function X
To activate/deactivate: activate or deac-
tivate PRE-SAFE ®
Brake in the on-board
computer (Y page 328).
If the PRE-SAFE ®
Brake is not activated, the
æ symbol appears in the multifunction
display.
If you have activated DSR (Y page 248) PRE-
SAFE ®
Brake is also deactivated.
This function will issue a warning if:
R at a speed of around 30 km/ hor more, the
distance maintained to the vehicle travel-
ling in front is insufficient for several sec-
onds
The · distance warning lamp then lights
up in the instrument cluster.
R at a speed of around 7 km/h or more, you
rapidly approach a vehicle in front or a
pedestrian
An intermittent warning tone will then
sound and the ·distance warning lamp
lights up in the instrument cluster. X
Brake immediately to defuse the situation.
or
X Take evasive action provided it is safe to do
so.
The PRE-SAFE ®
Brake function can also brake
the vehicle automatically under the following
conditions:
R the driver and front passenger have their
seat belts fastened
and
R the vehicle speed is between approx-
imately 7 km/h and 200 km/h
At a speed of up to approximately 70 km/h,
PRE-SAFE ®
Brake can also detect:
R stationary objects in the path of your vehi-
cle, e.g. stopped or parked vehicles
R pedestrians in the path of your vehicle
i If there is an increased risk of a collision,
preventive passenger protection measures
(PRE-SAFE ®
) are activated (Y page 64).
If the risk of a collision with the vehicle in front remains and you do not brake, take evasive
action or accelerate significantly, the vehicle
may perform automatic emergency braking,
up to the point of full brake application. Auto-
matic emergency braking is not performed
until immediately prior to an imminent acci-
dent.
You can prevent the intervention of PRE-
SAFE ®
Brake at any time by:
R depressing the accelerator pedal further
R activating kickdown
R releasing the brake pedal
The braking action of PRE-SAFE ®
Brake is
ended automatically if:
R you manoeuvre to avoid the obstacle
R there is no longer a risk of collision
R there is no longer an obstacle detected in
front of your vehicle Driving safety systems
89Safety Z

ment. Otherwise, the key may not be detec-
ted, e.g. when starting the engine using the
Start/Stop button.
A check which periodically establishes a radio
connection between the vehicle and the key
determines whether a valid key is in the vehi- cle. This occurs, for example:
R when starting the engine
R whilst driving
R when the external door handles are
touched
R during convenience closing Key functions
:
& Locks the vehicle
; F Opens/closes the tailgate
= % Unlocks the vehicle
X To unlock centrally: press the%but-
ton.
If you do not open the vehicle within
approximately 40 seconds of unlocking:
R the vehicle locks again
R protection against theft is reactivated
X To lock centrally: press the&button.
The key centrally locks and unlocks the fol-
lowing components:
R the doors
R the tailgate
R the fuel filler flap
When unlocking, the turn signals flash once.
When locking, they flash three times. You can also set an audible signal to confirm
that the vehicle has been locked. The audiblesignal can be activated and deactivated via
COMAND Online or Audio 20 (see the sepa-
rate operating instructions).
Only when all the components have been
locked, does the optical or acoustic locking
confirmation sound.
When the locator lighting is activated via
COMAND Online or Audio 20, it lights up
when it is dark and after the vehicle is
unlocked with the key (see the separate oper-ating instructions).
X To open the tailgate automatically from
outside the vehicle: press and hold the
F button until the tailgate opens.
Vehicles with KEYLESS-GO or KEYLESS-
GO start function:
X To close the tailgate automatically from
outside the vehicle: if the key is located in
the immediate vicinity of the vehicle, press
the F button on the key.
When the tailgate closes you can then
release the button. KEYLESS-GO
General notes Bear in mind that the engine can be started by
any of the vehicle occupants if there is a key
in the vehicle.
Locking and unlocking centrally You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you need to carry
the key with you. You can combine the KEY-
LESS-GO functions with the functions of a
conventional key. Unlock the vehicle by using
KEYLESS-GO, for instance, and lock it using
the & button on the key.
The driver's door and the door at which the
handle is used must both be closed. The key
must be outside the vehicle. When locking or unlocking with KEYLESS-GO, the distance Key
95Opening and closing Z

between the key and the corresponding door
handle must not be greater than 1 m.
A brief radio connection between the vehicle and the key determines whether a valid key isin, or in the direct vicinity of, the vehicle. This
occurs, for example:
R when starting the engine
R whilst driving
R when using HANDS-FREE ACCESS
R when the external door handles are
touched
R during convenience closing X
To unlock the vehicle: touch the inner
surface of the door handle.
X To lock the vehicle: touch sensor sur-
face :or;.
Make sure that you do not touch the inner
surface of the door handle.
X Convenience closing feature: touch
recessed sensor surface ;for an exten-
ded period.
For further information on the convenience closing feature (Y page 111).
X To unlock the tailgate: pull the tailgate
handle.
Deactivating and activating If you do not intend to use a key for an exten-
ded period of time, you can deactivate the
KEYLESS-GO function of the key. The key will
then use very little power, thereby conserving battery power. For the purposes of activation or deactivation, the vehicle does not have to
be nearby.
X To deactivate: press the&button on
the key twice in rapid succession.
The battery check lamp of the key flashes
twice briefly and lights up once, then KEY-
LESS-GO is deactivated (Y page 98).
X To activate: press any button on the key.
or
X Insert the key into the ignition lock.
KEYLESS-GO and all of its associated fea-
tures are available again. KEYLESS-GO start function
Bear in mind that the engine can be started by any of the vehicle occupants if there is a key
in the vehicle. Changing the settings of the locking
system
You can change the settings of the locking
system. This means that only the driver's door and the fuel filler flap are unlocked when the
vehicle is unlocked. This is useful if you fre-
quently travel alone.
X To change the setting: press and hold
down the %and& buttons simulta-
neously for about six seconds until the bat- tery indicator lamp flashes twice
(Y page 98).
If the setting of the locking system is changed
within the signal range of the vehicle, press-
ing the &or% button:
R locks or
R unlocks the vehicle
The key now functions as follows:
X To unlock: press the%button once.
X To unlock centrally: press the%but-
ton twice.
X To lock: press the &button. 96
KeyOpening and closing

Mercedes-Benz recommends that you have
the batteries replaced at a qualified specialist workshop.
Checking the battery X
Press the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharged if battery check
lamp :does not light up briefly.
X Replace the battery (Y page 98).
If the key battery is checked within the signal reception range of the vehicle, pressing the
& or% button:
R locks or
R unlocks the vehicle
i You can obtain a battery from any quali-
fied specialist workshop.
Replacing the battery You require a CR 2025 3 V cell battery.
X Take the emergency key element out of the
key (Y page 97). X
Press emergency key element ;into the
opening in the key in the direction of the
arrow until battery compartment cover :
opens. When doing so, do not hold battery
compartment cover :shut.
X Remove battery compartment cover :. X
Repeatedly tap the key against your palm
until battery =falls out.
X Insert the new battery with the positive ter-
minal facing upwards. Use a lint-free cloth
to do so.
X Make sure that the surface of the battery is
free of lint, grease and other contamina-
tion.
X Insert the front tabs of battery compart-
ment cover :into the housing and then
press to close it.
X Insert emergency key element ;into the
key.
X Check the function of all key buttons on the
vehicle. 98
KeyOpening and closing

Problem
Possible causes/consequences and
M
MSolutions The engine cannot be
started using the key. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 441).
or
X Jump-start the vehicle (Y page 443).
or
X Consult a qualified specialist workshop. The engine cannot be
started using the Start/
Stop button. The key is
in the vehicle. The vehicle is locked.
X Unlock the vehicle and try to start the vehicle again. The key battery is discharged or nearly discharged.
X Check the key battery (Y page 98) and replace it if necessary
(Y page 98).
If this does not work: X Start your vehicle with the key in the ignition lock. There is interference from a powerful source of radio waves.
X Start your vehicle with the key in the ignition lock. You have lost a key. X
Have the key deactivated at a qualified specialist workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the emer-
gency key element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. Doors
Important safety notes
United Kingdom only: G
WARNING
When the double locks are activated, the
doors can no longer be opened from the
inside. People in the vehicle can no longer get out, e.g. in hazardous situations. There is a
risk of injury. Therefore, do not leave any people unsuper-
vised in the vehicle, particularly children, eld- erly people or people in need of special assis-
tance. Do not activate the double lock when
people are in the vehicle.
If the vehicle has been locked from the out-
side, the double lock function is activated as
standard. It is then not possible to open the
doors from inside the vehicle. You can deac-
tivate the double lock function by deactivat-
ing the interior motion sensor (see the sepa- 100
DoorsOpening and closing

X
Insert the emergency key element into the
lock of the driver's door as far as it will go.
X Turn the emergency key element clockwise
as far as it will go to position 1.
The locking knob drops down and the driv- er's door is locked.
On right-hand-drive vehicles, turn the emer-
gency key element anti-clockwise.
X Turn the emergency key element back and
remove it.
X Insert the emergency key element into the
key (Y page 97).
X Make sure that the doors and the tailgate
are locked.
X Carefully press the protective cap onto the
lock cylinder until it engages and is seated firmly. Do not pull the door handle when
doing so.
If you lock the vehicle as described above, the
fuel filler flap is not locked. The anti-theft
alarm system is not primed. Luggage compartment
Important safety notes
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. If the tailgate is open when the engine is running, particu-
larly if the vehicle is moving, exhaust fumes
could enter the passenger compartment.
There is a risk of poisoning. Turn off the engine before opening the tail-
gate. Never drive with the tailgate open. G
WARNING
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, especially when braking or abruptly changing directions.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
! The tailgate swings upwards and to the
rear when opened. Therefore, make sure
that there is sufficient clearance above and behind the tailgate.
The opening dimensions of the tailgate can be
found in the "Vehicle data" section
(Y page 488).
You can limit the opening angle of the tailgate
(Y page 108).
Do not leave the key in the luggage compart- ment. You could otherwise lock yourself out.
Stow luggage or loads preferably in the lug-
gage compartment. Observe the loading
guidelines (Y page 390). Tailgate obstruction detection with
reversing function
Vehicles with remote tailgate closing fea- ture: the tailgate is equipped with automatic
obstacle recognition with a reversing feature. If a solid object blocks or restricts the tailgate
when automatically opening, this procedure
is stopped. If a solid object blocks or restricts the tailgate when automatically closing, the
tailgate automatically opens again slightly.
The automatic obstacle recognition with
reversing function is only an aid. It is not a
substitute for your attentiveness when open- ing and closing the tailgate. 104
Luggage compartmentOpening and closing

G
WARNING
The reversing function does not react:
R to soft, light and thin objects, e.g. small fin-
gers
R over the last 8 mm of the closing path
This means that the reversing feature cannot
prevent someone being trapped in these sit-
uations. There is a risk of injury.
When closing make sure that no body parts
are in the closing area.
If someone is trapped:
R press the Fbutton on the key or
R pull or press the remote operating switch
on the driver's door or
R press the closing or locking button on the
tailgate or
R pull the handle on the tailgate
Vehicles with HANDS-FREE ACCESS: it is
also possible to stop the closing process by
performing a kicking movement under the
rear bumper. Opening/closing from the outside
Opening X
Press the Fbutton on the key.
or X Pull handle :.
The tailgate opens. Closing
X
Pull the tailgate down using recesses :
and push it closed.
X Lock the vehicle if necessary with the &
button on the key or with KEYLESS-GO
(Y page 95). Opening/closing automatically from
the outside
Important safety notes G
WARNING
Parts of the body could become trapped dur-
ing automatic closing of the tailgate. More-
over, people, e.g. children, may be standing in the closing area or may enter the closing area
during the closing process. There is a risk of
injury.
Make sure that nobody is in the vicinity of the closing area during the closing process.
Use one of the following options to stop the
closing process:
R press the Fbutton on the key
R pull or press the remote operating switch
on the driver's door
R press the closing or locking button on the
tailgate
R pull the handle on the tailgate
Vehicles with HANDS-FREE ACCESS: it is
also possible to stop the closing process by
performing a kicking movement under the
rear bumper. Luggage compartment
105Opening and closing Z

!
The tailgate swings upwards and to the
rear when opened. Therefore, make sure
that there is sufficient clearance above and behind the tailgate.
Two warning tones sound while the tailgate is
opening or closing.
The opening dimensions of the tailgate can be found in the "Vehicle data" section
(Y page 488).
Opening automatically You can open the tailgate automatically with
the key or the handle in the tailgate.
X Press and hold the Fbutton on the key
until the tailgate opens.
or
X When the tailgate is unlocked, pull the han-
dle and let it go again immediately.
or
X With the tailgate stopped in an intermedi-
ate position, pull the tailgate upwards.
You can release the tailgate as soon as the tailgate starts to open.
Closing automatically :
Closing button
; Locking button
X To close: press button :on the tailgate.
or
X Pull the tailgate downwards slightly.
You can release the tailgate as soon as the tailgate starts to close. When the driver's door is closed, you can
simultaneously close the tailgate and lock the
vehicle. The KEYLESS-GO key must be in the
rear detection range of the vehicle.
X Press locking button ;in the tailgate.
If KEYLESS-GO detects a key outside the
vehicle, the tailgate closes. The vehicle is
locked.
or
Vehicles with EASY-PACK tailgate and
with KEYLESS-GO or KEYLESS-GO start-
function: X If the key is located in the immediate vicin-
ity of the vehicle: press the Fbutton on
the key.
You can release the button as soon as the
tailgate starts to close.
If KEYLESS-GO only detects a key in the lug-
gage compartment, the tailgate is unlocked
again after closing.
If KEYLESS-GO detects a second key outside the vehicle, the tailgate remains locked.
If KEYLESS-GO detects a key in the luggage
compartment before the closing procedure
starts, the tailgate remains open. HANDS-FREE ACCESS
Important safety notes G
WARNING
The vehicle exhaust system can become very
hot. If you use HANDS-FREE ACCESS, you
could burn yourself by touching the exhaust
system. There is a risk of injury. Always
ensure that you only make a leg movement
within the detection range of sensors.
! If the key is within the rear detection
range of KEYLESS-GO, the following situa-
tions, for example, could lead to the unin-
tentional opening of the tailgate:
R using a car wash
R using a high-pressure cleaner 106
Luggage compartmentOpening and closing