check engine light MERCEDES-BENZ GLC COUPE 2016 User Guide

Problems with the windscreen wipers
Problem
Possible causes/consequences and
M
MSolutions The windscreen wipers
are jammed. Leaves or snow, for example, are obstructing windscreen wiper move-
ment. The wiper motor has been deactivated.
X Switch off the engine.
X Remove the key from the ignition lock.
or, on vehicles with KEYLESS-GO or KEYLESS ‑GO start function:
X Open the driver's door.
The vehicle electronics now have status 0. This is the same as the
key having been removed.
X Remove the cause of the obstruction.
X Switch the windscreen wipers back on. The windscreen wipers
fail completely. The windscreen wiper drive is malfunctioning.
X Select another wiper speed on the combination switch.
X Have the windscreen wipers checked at a qualified specialist work-
shop. The windscreen washer
fluid from the spray noz-
zles no longer hits the
centre of the wind-
screen. The spray nozzles are misaligned.
X Have the spray nozzles adjusted at a qualified specialist workshop. 126
Windscreen wipersLights and windscreen wipers

G
WARNING
Flammable materials introduced through
environmental influence or by animals can
ignite if in contact with the exhaust system or parts of the engine that heat up. There is a risk
of fire.
Carry out regular checks to make sure that
there are no flammable foreign materials in
the engine compartment or in the exhaust
system.
General notes Vehicles with a petrol engine:
the catalytic
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 j
(Y page 154).
The transmission position indicator on the
multifunction display shows j
(Y page 155).
i You can start the engine in transmission
position jand i.
Starting procedure using the key To start the engine using the key instead of the
Start/Stop button, pull the Start/Stop button
out of the ignition lock.
X To start a diesel engine: turn the key to
position 2in the ignition lock (Y page 144).
The % preglow indicator lamp on the
instrument cluster lights up.
X Turn the key to position 3in the ignition lock
(Y page 144) and release it as soon as the
engine is running.
i Vehicles with a diesel engine:
you can
start the engine without preglow if the engine
is warm.
If the engine will not start:
X Remove the key from the ignition lock.
X Reinsert the key in the ignition lock after wait-
ing for a short period. X
Turn the key to position 2in the ignition lock
(Y page 144).
The indicator lamps on the instrument cluster
light up (Y page 280).
X Turn the key to position 3in the ignition lock
(Y page 144) and release it as soon as the
engine is running.
Starting procedure using the Start/
Stop button The Start/Stop button is available only on vehi-
cles with KEYLESS-GO or the KEYLESS-GO start
function.
The Start/Stop button can be used to start the
vehicle manually without inserting the key in 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
manually operates independently of the ECO
start/stop automatic engine start function.
You can start the engine if a valid key is in the
vehicle. Switch off the engine and always take
the key with you when leaving the vehicle, even
if you leave it for only a short time. Observe the important safety notes.
X Depress the brake pedal and keep it
depressed.
X Press the Start/Stop button once
(Y page 144).
Vehicles with a petrol engine: the engine
starts.
Vehicles with a diesel engine: preglow is
activated and the engine starts. Pulling away
General notes 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.
Depress the accelerator carefully when pulling
away. 146
DrivingDriving and parking

Problem
Possible causes/consequences and
M
MSolutions The engine does not
start. The starter motor
can be heard. The
reserve fuel warning
lamp is lit and the fuel
gauge display is at the
reserve level. 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 348).
If the engine does not start despite attempts to jump-start it:
X Consult a qualified specialist workshop. The starter motor was exposed to excessively high thermal load.
X Start the engine again (Y page 145).
If the engine still does not start: X Consult a qualified specialist workshop. Vehicles with a petrol
engine:
The engine is not running
smoothly and is misfir-
ing. The engine electronics or a mechanical component of the engine
management system are/is malfunctioning.
X Depress the accelerator pedal only slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it.
X Have the cause rectified immediately at a qualified specialist work-
shop. The coolant temperature
display is showing more
than 120 †. A display
message may also
appear on the multifunc-
tion display and a warn-
ing tone may sound. The coolant level is too low. The coolant is too hot and the engine is not
being cooled sufficiently.
X Stop as soon as possible and allow the engine and the coolant to
cool down.
X Check the coolant level (Y page 329). Observe the warning notes
as you do so and top up the coolant if necessary. If the coolant level is correct, the engine radiator fan may be faulty. The
coolant is too hot and the engine is not being cooled sufficiently.
X If the coolant temperature is below 120 †, you can continue driving
to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in moun-
tainous terrain and stop-start traffic. Driving
151Driving and parking Z

X
If this is the case, park the vehicle only on
level ground and secure it to prevent it from
rolling away.
X Shift the automatic transmission to position
P.
It may not be possible to release an applied
parking brake if the on-board voltage is low or if there is a malfunction in the system. Contact a
qualified specialist workshop.
The electric parking brake carries out a function
check at regular intervals when the engine is
switched off. Noises that occur are normal.
Applying or releasing manually X
To apply: push handle :.
When the electric parking brake is applied,
red indicator lamp !lights up on the
instrument cluster.
The electric parking brake can also be applied when the key is removed.
X To release: pull handle:.
Red indicator lamp !on the instrument
cluster goes out.
The electric parking brake can be released only:
R when the key is in position 1or 2in the igni-
tion lock (Y page 144) or
R if the ignition was switched on using the
Start/Stop button
Applying automatically The electric parking brake is automatically
applied when the transmission is in position P
and:
R the engine is switched off or
R the driver is not wearing a seat belt and the
driver's door is opened To prevent the electric parking brake from being
applied automatically, pull handle :.
The electric parking brake is also applied auto-
matically if:
R DISTRONIC PLUS brings the vehicle to a
standstill or
R the HOLD function is keeping the vehicle sta-
tionary or
R Active Parking Assist is keeping the vehicle
stationary
In addition, at least one of the following condi-
tions must be fulfilled:
R the engine is switched off
R the driver is not wearing a seat belt and the
driver's door is opened
R there is a system malfunction
R the power supply is insufficient
R the vehicle is stationary for a lengthy period
Red indicator lamp !on the instrument clus-
ter lights up.
The electric parking brake is not automatically
applied if the engine is switched off by the ECO
start/stop function.
Releasing automatically The electric parking brake of your vehicle is
released automatically when all the following
conditions are fulfilled:
R the seat belt is fastened
R the engine is running
R you accelerate and the transmission is in
position Dor R
or
you shift the transmission position from Pto
position Dor R– You will need to accelerate
more on steeper gradients
If the transmission is in position R, the tailgate
must be closed.
If your seat belt is not fastened, the following
conditions must be fulfilled for the electric park- ing brake to be released automatically:
R the driver's door is closed
R you are shifting from transmission position P
or you have previously driven at speeds
greater than 3 km/h
Ensure that you do not depress the accelerator
pedal unintentionally. Otherwise, the parking
brake will be released and the vehicle will start
to move. Parking
169Driving and parking Z

If cruise control is deactivated, a warning tone
sounds. You will see the Cruise control off
Cruise control off
message on the multifunction display for
approximately five seconds. The message on
the multifunction display disappears and the
segments on the speedometer go out.
i The last speed stored is cleared when you
switch off the engine. SPEEDTRONIC
General notes SPEEDTRONIC is used to set a speed limit for
your vehicle. If the vehicle speed exceeds the
set speed limit, SPEEDTRONIC brakes automat- ically. Shift to a lower gear in good time on long
and steep downhill gradients. Take particular
note of this when driving a laden vehicle and
when towing a trailer. By doing so, you will make use of the braking effect of the engine. This
relieves the load on the brake system and pre-
vents the brakes from overheating and wearing too quickly.
Important safety notes SPEEDTRONIC can neither reduce the risk of an
accident if you fail to adapt your driving style nor override the laws of physics. SPEEDTRONIC
cannot take into account road, weather or traffic
conditions. SPEEDTRONIC is only an aid. You
are responsible for maintaining a safe distance
from the vehicle in front, for vehicle speed, for
braking in good time and for staying in lane.
If there is a change of drivers, advise the new
driver of the speed stored.
You can set a variable or permanent limit speed:
R variable for speed limits, e.g. in built-up areas
R permanent for long-term speed restrictions,
e.g. when driving with winter tyres fitted
(Y page 177)
i The speed indicated in the speedometer
may differ slightly from the limit speed stored. Variable SPEEDTRONIC General notes
:
To store the current speed or a higher speed
; LIM indicator lamp
= To store the current speed or calling up the
last stored speed
? To store the current speed or a lower speed
A To switch between cruise control or
DISTRONIC PLUS and variable SPEED-
TRONIC
B Deactivating variable SPEEDTRONIC
With the cruise control lever, you can operate
cruise control or DISTRONIC PLUS and variable SPEEDTRONIC.
The LIM indicator lamp on the cruise control
lever indicates which system you have selected:
R LIM indicator lamp off: cruise control or
DISTRONIC PLUS is selected
R LIM indicator lamp on: variable SPEED-
TRONIC is selected
You can use the cruise control lever to limit the speed to any speed above 30 km/h while the
engine is running. If you have set a permanent
limit speed, you can variably limit the speed up
to the fixed limit speed (Y page 177).
Selecting variable SPEEDTRONIC
If there is a change of drivers, advise the new
driver of the limit speed stored. X Check whether LIM indicator lamp ;is on.
If it is on, variable SPEEDTRONIC is already
selected.
If it is not, press the cruise control lever in the direction of arrow A.
LIM indicator lamp ;in the cruise control
lever is on. Variable SPEEDTRONIC is selec-
ted. 176
Driving systemsDriving and parking

In particular, the detection of obstacles can be
impaired in the case of:
R dirt on the sensors or obscured sensors
R snow or heavy rain
R interference by other radar sources
R strong radar reflections, e.g. in multi-storey
car parks
If DISTRONIC PLUS no longer detects a vehicle
in front, it may unexpectedly accelerate to the
speed stored.
This speed can:
R be too high for a filter lane or a slip road
R be so high in the right lane that you pass vehi-
cles driving on the left (in countries where
they drive on the right)
R be so high in the left lane that you pass vehi-
cles driving on the right (in countries where
they drive on the left)
If there is a change of drivers, advise the new
driver of the speed stored.
Cruise control lever :
To activate or increase speed
; Setting the specified minimum distance
= LIM indicator lamp
? To activate at the current speed/last stored
speed
A To activate or reduce speed
B To switch between DISTRONIC PLUS and
variable SPEEDTRONIC
C Deactivating DISTRONIC PLUS
You can operate variable SPEEDTRONIC and
DISTRONIC PLUS with the cruise control lever. LIM indicator lamp
=on the cruise control lever
indicates which function you have selected:
R LIM indicator lamp= =lit:variable SPEED-
TRONIC is selected.
R LIM indicator lamp = =off:DISTRONIC PLUS
is selected
When you activate DISTRONIC PLUS, the
stored speed will appear on the multifunction display for five seconds.
Speedometer with segments: when
DISTRONIC PLUS is activated, the segments
from the stored speed to the end of the scale or to a permanently set speed limit light up.
Selecting DISTRONIC PLUS X
Check whether LIM indicator lamp =is off.
If it is off, DISTRONIC PLUS is already selec-
ted.
X If it is not, move the cruise control lever in the
direction of arrow B.
LIM indicator lamp =in the cruise control
lever goes out. DISTRONIC PLUS is selected.
Activating DISTRONIC PLUS Activation conditions
To activate DISTRONIC PLUS, the following con-
ditions must be fulfilled:
R The engine must be running. It may take up to
two minutes of driving before DISTRONIC
PLUS is ready for use.
R The electric parking brake must be released.
R ESP ®
must be switched on, but must not cur-
rently engage.
R Active Parking Assist must not be activated.
R The transmission must be in position D.
R The driver's door must be closed or your seat
belt must be fastened when you shift from P
to D.
R The front-passenger door and the rear doors
must be closed.
R The DISTRONIC PLUS function must be selec-
ted (Y page 179). Driving systems
179Driving and parking Z

A warning tone sounds. The parking symbol dis-
appears and the multifunction display shows the
Park Assist cancelled
Park Assist cancelled message.
When Active Parking Assist is cancelled, you
must steer and brake again yourself.
If a system malfunction occurs, the vehicle is
braked to a standstill. To drive on, depress the
accelerator pedal again. Reversing camera
General notes Reversing camera
:is a visual parking and
manoeuvring aid. It shows the area behind the
vehicle with guide lines in the multimedia sys-
tem.
The area behind the vehicle is displayed as a
mirror image, as in the rear-view mirror.
i The text shown in the multimedia system
depends on the language setting. The follow- ing are examples of reversing camera displays
in the multimedia system.
Important safety notes The reversing camera is only an aid. It is not a
substitute for your attention to the immediate
surroundings. The responsibility for safe
manoeuvring and parking remains with you.
Make sure that there are no persons, animals or
objects in range while manoeuvring and parking.
The reversing camera will not function or will
function only in a limited manner:
R if the tailgate is open
R in heavy rain, snow or fog
R at night or in very dark places
R if the camera is exposed to very bright light R
if the area is lit by fluorescent lamps or LED
lighting (the display may flicker)
R if there is a sudden change in temperature,
e.g. when driving into a heated garage in win-
ter
R if the camera lens is dirty or obstructed.
Observe the notes on cleaning
(Y page 335)
R if the rear of your vehicle is damaged. In this
case, have the camera position and setting
checked at a qualified specialist workshop
The field of vision and other functions of the
reversing camera may be restricted due to addi-
tional accessories on the rear of the vehicle (e.g. licence plate holder, rear-mounted bicycle
rack).
The reversing camera is protected from rain-
drops and dust by a flap. When the reversing
camera is activated, this flap opens.
The flap closes again when:
R you have finished the manoeuvring process
R you switch off the engine
R you open the luggage compartment
See the notes on cleaning (Y page 335).
For technical reasons, the flap may remain open
briefly after the reversing camera has been
deactivated.
Activating/deactivating the reversing
camera X
To activate: make sure that the Activa‐ Activa‐
tion by R gear
tion by R gear function is selected in the
multimedia system (see Digital Owner's Man-
ual).
X Engage reverse gear.
The reversing camera flap opens. The area
behind the vehicle appears with guide lines in the multimedia system. 198
Driving systemsDriving an
d parking

Warning lamp
:
Warning lamp
Blind Spot Assist is not active at speeds below
approximately 30 km/h. Vehicles in the moni-
toring range are then not indicated.
If a vehicle is detected within the blind spot
monitoring range at speeds above approx-
imately 30 km/h, warning lamp :on the cor-
responding side lights up red. This warning lamp always lights up when a vehicle enters the blindspot monitoring range from behind or from the
side. When you overtake a vehicle, the warning
occurs only if the difference in speed is less than
12 km/h.
If you select reverse gear, Blind Spot Assist is
not operational.
The brightness of the warning lamps is auto-
matically adapted to the brightness of the sur-
roundings.
Collision warning
If a vehicle is detected in the blind spot moni-
toring range and you switch on the correspond-
ing turn signal, a double warning tone sounds.
The red warning lamp flashes on the relevant
exterior mirror. If the turn signal remains on,
detected vehicles are indicated by the flashing
of the red warning lamp on the exterior mirror.
There are no further warning tones.
Activating Blind Spot Assist
X Make sure that Blind Spot Assist is activated
in the on-board computer (Y page 241).
X Turn the key to position 2in the ignition lock.
The red warning lamps on the exterior mirrors
light up until the engine is started. Display in the Assist image
When Blind Spot Assist is activated, grey radar
waves propagating backwards appear next to
the vehicle in the Assist image on the multifunc-
tion display (Y page 239). Above a speed of
30 km/h, the colour of the radar waves in the
Assist image changes to green :. Blind Spot
Assist is then ready for use.
Towing a trailer
If you couple up a trailer, make sure that you
have correctly established the electrical con-
nection. This can be accomplished by checking
the trailer lighting. Blind Spot Assist is then
deactivated. The Blind Spot Assist not Blind Spot Assist not
available when towing a trailer See
available when towing a trailer See
Owner's Manual Owner's Manual message appears in the mul-
tifunction display.
Lane Keeping Assist General notes
Lane Keeping Assist monitors the area in front of
your vehicle by means of multifunction cam-
era :attached at the top of the windscreen.
Lane Keeping Assist detects lane markings on
the road and can warn you before you leave your lane unintentionally. Driving systems
211Driving and parking Z

If you drive at speeds above 60 km/h and lane
markings are detected, the lines on the assis- tant display (Y page 239) appear in green.
Active Lane Keeping Assist is ready for use.
X To deactivate: press button;.
Indicator lamp :goes out. Active Lane Keep-
ing Assist is deactivated. The Lane
Lane Keeping
Keeping
Assist off
Assist off message appears on the multi-
function display.
Selecting Standard or Adaptive setting X On the Assistance
Assistance menu on the on-board
computer, select the Active Lane Keep‐
Active Lane Keep‐
ing Assist
ing Assist function (Ypage 242).
X Select setting Standard
StandardorAdaptive
Adaptive.
When Standard
Standard is selected, no warning vibra-
tion occurs if:
R you have switched on the turn signal. In this
event, the warnings are suppressed for a
certain period of time
R a driving safety system such as ABS, BAS or
ESP ®
engages
When Adaptive Adaptive is selected, no warning vibra-
tion occurs if:
R you have switched on the turn signal. In this
event, the warnings are suppressed for a
certain period of time
R a driving safety system such as ABS, BAS or
ESP ®
engages
R you accelerate hard, e.g. kickdown
R you brake hard
R you steer actively, e.g. swerve to avoid an
obstacle or change lane quickly
R you cut the corner on a sharp bend
To ensure that you are warned only when nec-
essary and in good time if you cross the lane
marking, the system detects certain conditions
and warns you accordingly.
The warning vibration occurs earlier in the fol-
lowing situations:
R you approach the outer lane marking on a
bend
R the road has very wide lanes, e.g. a motorway
R the system detects solid lane markings
The warning vibration occurs later in the follow- ing situations:
R the road has narrow lanes
R you cut the corner on a bend Towing a trailer
If you couple up a trailer, make sure that you
have correctly established the electrical con-
nection. This can be accomplished by checking
the trailer lighting. Towing a trailer
Important safety notes
G
WARNING
You could lose control of the vehicle/trailer
combination if it begins to swerve. The vehi-
cle/trailer combination could even overturn.
There is a risk of an accident.
On no account should you attempt to
straighten out the vehicle/trailer combina-
tion by increasing speed. Decrease your
speed and do not countersteer. Brake if nec-
essary. G
WARNING
If the maximum permissible load for a carrier system is exceeded, the carrier could come
loose from the vehicle and endanger other
road users. There is a risk of an accident and injury.
Never exceed the maximum permissible load
when using a carrier.
! If you have a trailer tow hitch retrofitted,
changes to the engine cooling system may be necessary, depending on the vehicle type.
If you have a trailer tow hitch retrofitted,
observe the anchorage points on the chassis.
Retrofitting a trailer tow hitch is only permissible
if a trailer load is specified in your vehicle docu-
ments. If this is not the case, then the vehicle is not approved for towing a trailer.
For more information, please contact a qualifiedspecialist workshop.
Exceeding the maximum permissible nose-
weight of the trailer drawbar on the ball coupling
may cause damage.
Damage may be caused to the following:
R towing vehicle
R trailer 218
Towing a trailerDriving and parking

Coupling up a trailer
X Apply the electric parking brake manually.
X Shift the transmission to position P.
X Position the trailer on a level surface behind
the vehicle.
X Couple up the trailer.
X Establish the electrical connection between
the vehicle and the trailer.
X Check that the trailer lighting system is work-
ing.
X Push the combination switch upwards and
downwards and check whether the corre-
sponding turn signal indicator on the trailer is
flashing.
A connected trailer is only detected when the
electrical connection is established correctly
and the lighting system is working properly. The
function of other systems also depends on this, for example:
R ESP ®
R PARKTRONIC
R Active Parking Assist
R Active Blind Spot Assist
R Active Lane Keeping Assist Uncoupling a trailer
G
WARNING
If you uncouple a trailer with an engaged over- run brake, you could trap your hand between
the vehicle and the trailer drawbar. This poses a risk of injury.
Do not uncouple a trailer with an engaged
overrun brake. G
WARNING
Vehicles with level control:
If you disconnect the trailer cable, the vehicle is lowered. This can cause you or others to
become trapped between the vehicle body
and tyres, or underneath the vehicle. This
poses a risk of injury.
Make sure that no-one is in the immediate
vicinity of the wheel arch or underneath the
vehicle when disconnecting the trailer cable. !
Do not disconnect a trailer with an engaged
overrun brake. Otherwise, your vehicle could
be damaged by the rebounding of the overrun
brake.
! Remove the adapter cable before folding in
the ball coupling. You could otherwise dam-
age the rear bumper and the adapter cable.
X Apply the electric parking brake manually.
X Shift the transmission to position P.
X Switch off the engine.
X Secure the vehicle and trailer against rolling
away.
X Remove the trailer cable and uncouple the
trailer. Trailer power supply
! Accessories with a maximum power con-
sumption of 180 W can be connected to the
permanent power supply.
The trailer battery may not be charged from
the power supply.
When it leaves the factory, your vehicle's trailer
socket is equipped with a permanent power
supply and a power supply that is switched on
via the ignition lock.
The permanent power supply is supplied via
trailer socket pin 9.
The power supply that is switched on via the
ignition lock is supplied via trailer socket pin 10.
The trailer's permanent power supply is
switched off in the event of low on-board voltage
and after six hours at the latest.
You can find more information about installing
the trailer electrics at a qualified specialist work- shop.
To activate the switched power supply:
X Turn the key to position 2in the ignition lock
(Y page 144).
or
X Press the Start/Stop button twice on vehicles
with KEYLESS-GO or the KEYLESS-GO start
function (Y page 144).222
Towing a trailerDriving and parking