2016 MERCEDES-BENZ GLC COUPE battery

Problem
Possible causes/consequences and
M
MSolutions You can no longer lock or
unlock the vehicle using
KEYLESS-GO. KEYLESS-GO has been deactivated.
X Reactivate KEYLESS-GO (Y page 83). The key battery is weak or discharged.
X Check the key battery (Y page 85) and replace if necessary
(Y page 85).
If this does not work: X Lock or unlock the vehicle using the emergency key element
(Y page 90). Interference from a powerful source of radio waves.
X Lock or unlock the vehicle using the emergency key element
(Y page 90). Fault with KEYLESS-GO.
X Lock or unlock the vehicle using the remote control function of the
key.
X Have the vehicle and key checked at a qualified specialist work-
shop.
If the vehicle cannot be locked or unlocked even using the remote
control function:
X Lock or unlock the vehicle using the emergency key element
(Y page 90).
X Have the vehicle and key checked at a qualified specialist work-
shop. 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 347).
or X Jump-start the vehicle (Y page 348).
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 weak or discharged.
X Check the key battery (Y page 85) and replace if necessary
(Y page 85).
If this does not work: X Start your vehicle with the key in the ignition lock. Interference from a powerful source of radio waves.
X Start your vehicle with the key in the ignition lock. Key
87Opening and closing Z

The three red indicator lamps in the button indi-
cate the heating level you have selected.
The system automatically switches down from
level 3to level 2after approximately eight
minutes.
The system automatically switches down from
level 2to level 1after approximately ten
minutes.
The system automatically switches off approx-
imately 20 minutes after it is set to level 1.
X Turn the key to position 1or 2in the ignition
lock (Y page 144).
X To switch on: press button:repeatedly
until the desired heating level is set.
X To switch off: press button:repeatedly
until all the indicator lamps go out.
i If the vehicle battery voltage is too low, the
seat heating may switch off.
i If drive program
E(Y page 157) is selected,
the power of the seat heating is reduced. Switching the seat ventilation on/off
Switching on/off The blue indicator lamps in the button indicate
the ventilation level you have selected.
X Turn the key to position 1or 2in the ignition
lock(Y page 144).
X To switch on: press button:repeatedly
until the desired ventilation level is set.
X To switch off: press button:repeatedly
until all the indicator lamps go out.
i If the vehicle battery voltage is too low, the
seat ventilation may switch off.
i You can open the side windows and the slid-
ing sunroof using the "Convenience opening" feature (Y page 96). The seat ventilation of
the driver's seat automatically switches to the
highest level.
i When the vehicle is stationary, the fan
speed can be reduced automatically. This
reduces the noise of the seat ventilation. Seats
107Seats, steering wheel and mirrors Z

Problems with the seat heating / seat ventilation
Problem
Possible causes/consequences and
M
MSolutions The seat heating or seat
ventilation has switched
off prematurely or can-
not be switched on. The on-board voltage is too low because too many electrical consum-
ers are switched on.
X Switch off electrical consumers that you do not need, such as the
rear window heating or interior lighting.
Once the battery is sufficiently charged, the seat heating or seat
ventilation can be switched back on manually. Steering wheel
Important safety notes
G
WARNING
You could lose control of the vehicle while
driving if you:
R adjust the driver's seat, steering wheel or
mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirrors and fasten your seat
belt before starting the engine. G
WARNING
Children could become trapped by the steer-
ing wheel if they adjust it. There is a risk of
injury.
When leaving the vehicle, always take the key with you and lock the vehicle. Never leave
children unattended in the vehicle.
The electrically adjustable steering wheel can
still be adjusted when there is no key in the igni-
tion lock. Adjusting the steering wheel man-
ually
:
Release lever
; To adjust the steering wheel height
= To adjust the steering wheel position (fore-
and-aft adjustment)
X Push release lever :down completely.
The steering column is unlocked.
X Adjust the steering wheel to the desired posi-
tion.
X Push release lever :up as far as it will go.
The steering column is locked.
X Check that the steering column is locked.
When doing so, try to push the steering wheel
up or down or try to move it in the fore-and-aft
direction. 108
Steering wheelSeats, steering wheel and mirrors

Exterior mirrors
Important safety notes G
WARNING
You could lose control of the vehicle while
driving if you:
R adjust the driver's seat, steering wheel or
mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirrors and fasten your seat
belt before starting the engine. G
WARNING
The exterior mirrors reduce the size of the
image. Objects visible in the mirrors are
closer than they appear. You could misjudge
the distance from road users driving behind
you when changing lanes, for instance. There is a risk of an accident.
You should therefore always look over your
shoulder to determine the actual distance
from road users driving behind you.
Adjusting the exterior mirrors X
Turn the key to position 1or 2in the ignition
lock (Y page 144).
X Exterior mirror on the front-passenger side:
press button ;.
Exterior mirror on the driver's side: press but-
ton =.
The indicator lamp lights up in the button that has been pressed. The indicator lamp goes out again after some
time. You can adjust the selected exterior
mirror using button :as long as the indicator
lamp is lit.
X Press button :up, down, left or right until
you have adjusted the exterior mirror to the
correct position. You should have a good
overview of traffic conditions.
The convex exterior mirrors provide a larger field of vision.
After the engine has been started, the exterior
mirrors are automatically heated if the rear win-
dow heating is switched on and the outside tem- perature is low.
Folding the exterior mirrors in/out elec- trically X
Turn the key to position 1or 2in the ignition
lock (Y page 144).
X Briefly press button :.
Both exterior mirrors fold in or out.
i Make sure that the exterior mirrors are
always folded out fully while driving, other-
wise they could vibrate.
i If you are driving at speeds of more than
47 km/h, you can no longer fold in the exte-
rior mirrors.
Resetting the exterior mirrors If the battery has been disconnected or com-
pletely discharged, the exterior mirrors must be reset. The exterior mirrors will otherwise not
fold in when you activate the Automatic mir‐ Automatic mir‐
ror-folding function
ror-folding function function in the multi-
media system.
X Turn the key to position 1or 2in the ignition
lock (Y page 144).
X Briefly press button :. Mirrors
111Seats, steering wheel and mirrors Z

The light setting is automatically selected
according to the brightness of the ambient light,
but not in the event of poor visibility due to
weather conditions such as fog, snow or spray.
R With the key in position 1in the ignition lock,
the side lamps are switched on or off auto-
matically depending on the brightness of the
ambient light.
R The daytime driving lights or the side lamps
and dipped-beam headlamps are switched on
or off automatically while the engine is run-
ning depending on the ambient light condi-
tions.
X To switch on the automatic headlamps:
turn the light switch to the Ãposition.
The daytime driving lights improve the visibility
of your vehicle during the day.
When the side lamps and dipped-beam head-
lamps are switched on, the green Tside
lamps and Ldipped-beam headlamps indi-
cator lamps on the instrument cluster light up.
Dipped-beam headlamps G
WARNING
When the light switch is set to Ã, the
dipped-beam headlamps may not be switched on automatically if there is fog, snow or othercauses of poor visibility due to the weather
conditions such as spray. There is a risk of an
accident.
In such situations, turn the light switch to
L.
When the ignition is switched on and the light
switch is in the Lposition, the side lamps
and dipped-beam headlamps are switched on
even if the light sensor does not sense dark
ambient light conditions. This is advantageous
when there is fog or rain.
X To switch on the dipped-beam headlamps:
turn the key in the ignition lock to position 2
or start the engine.
X Turn the light switch to the Lposition.
The green Lindicator lamp on the instru-
ment cluster lights up.
Rear fog lamp The rear fog lamp improves the visibility of your
vehicle for the traffic behind in the event of
heavy fog. You must observe the legal require- ments for the country in which you are currently
driving when operating the rear fog lamp.
X To switch on the rear fog lamp: turn the key
in the ignition lock to position 2or start the
engine.
X Turn the light switch to the LorÃ
position.
X Press the Rbutton.
The yellow Rindicator lamp on the instru-
ment cluster lights up.
Side lamps ! When the battery is discharged heavily, the
side lamps or parking lamps are automatically
switched off to facilitate an engine start.
Always park your vehicle safely and in a well lit area, in accordance with the relevant legal
stipulations. Avoid using the Tside lamps
for periods lasting several hours. Where pos-
sible, switch on the right Xor left W
parking lamp.
X To switch on the side lamp: turn the light
switch to the Tposition.
The green Tindicator lamp on the instru-
ment cluster lights up.
Parking lamps Switching on the parking lamps ensures that the
corresponding side of the vehicle is illuminated.
X To switch on the parking lamp: turn the key
to position 0in the ignition lock or remove the
key.
X Turn the light switch to the W(left-hand
side of the vehicle) or X(right-hand side of
the vehicle) position. 116
Exterior lightingLights and windscreen wipers

Interior lighting
Overview of interior lighting
Front overhead control panel :
p Left-hand front reading lamp
; | Automatic interior lighting control
= c Front interior lighting
? u Rear interior lighting
A p Right-hand front reading lamp
Control panel in the grab handle (rear
compartment) :
Reading lamp
; p Switches the reading lamp on/off Interior lighting control
General notes In order to prevent the vehicle's battery from
discharging, the interior lighting functions are
automatically deactivated after some time
except for when the key is in position 2in the
ignition lock. The colour and brightness of the ambient light-
ing are set using the multimedia system (see
Digital Owner's Manual).
Automatic interior lighting control X
To switch on or off: press the|button.
When the automatic interior lighting control is
switched on, the button is flush with the over- head control panel.
The interior lighting automatically switches on if
you:
R unlock the vehicle
R open a door
R remove the key from the ignition lock
The interior lighting is activated for a short time
when the key is removed from the ignition lock. This delayed switch-off can be adjusted via the
multimedia system (see Digital Owner's Man-
ual). Replacing bulbs
Important safety notes
G
WARNING
Bulbs, lamps and plug connectors can
become very hot during use. When replacing a bulb, you could burn yourself on these com-
ponents. There is a risk of injury.
Allow these components to cool down beforereplacing the bulb.
Do not use a bulb if it has been dropped or if its
glass tube has been scratched.
The bulb may explode if:
R you touch it
R it is hot
R you drop it
R you scratch it
Use bulbs only in closed lamps that have been
designed for this purpose. Fit only spare bulbs of the same type and the specified voltage.
Marks on the glass tube reduce the service life
of the bulbs. Do not touch the glass tube with
your bare hands. If necessary, clean the glass
tube when cold with alcohol or spirit and rub it
off with a lint-free cloth. Replacing bulbs
121Lights and windscreen wipers Z

Switching the "Windscreen demisting"
function on or off
X
Turn the key to position 2in the ignition lock
(Y page 144).
X To switch on:press rocker switch ¬on
the front control unit up or down.
The indicator lamp above rocker switch ¬
lights up. The current climate control settings are deactivated.
The climate control system switches to the
following functions:
R high airflow
R high temperature
R air distribution to the windscreen and front
side windows
R air-recirculation mode off
i If necessary, the "Cooling with dehumidifi-
cation" function is activated. In this case, the
indicator lamp above rocker switch
¿ remains switched off.
X To switch off: press rocker switch ¬up or
down.
The indicator lamp above rocker switch ¬
goes out. The previous settings are reactiva-
ted. Air-recirculation mode remains deactiva- ted. Demisting the windows
Windows misted up on the inside X
Activate the "Cooling with air dehumidifica-
tion" function with the ¿rocker switch.
i For THERMOTRONIC automatic climate
control with auxiliary heating, the "Cooling with air dehumidification" function can be
activated only using the multimedia system.
X Switch on automatic mode using the Ã
rocker switch.
X If the windows continue to mist up, activate
the "Windscreen demisting" function using
the ¬ rocker switch.
i You should select this setting only until the
windscreen is clear again.
Windows misted up on the outside X
Switch on the windscreen wipers.
X Switch on automatic mode using the Ã
rocker switch.
i If you clean the windows regularly, they do
not mist up as quickly. Rear window heating
General notes The rear window heating has a high current
draw. You should therefore switch it off as soon
as the window is clear. It otherwise switches off
automatically after several minutes.
If the battery voltage is too low, the rear window heating may switch off.
Switching the sound on/off X
Turn the key to position 2in the ignition lock
(Y page 144).
X Press the ¤rocker switch up or down.
The indicator lamp above the ¤rocker
switch lights up or goes out.
Problems with the rear window heating Problem
Possible causes/consequences and
M MSolutions The rear window heating
has switched off prema-
turely or cannot be acti-
vated. The battery has not been sufficiently charged.
X Switch off any consumers that are not required, e.g. reading lamps,
interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window heating
can be activated again. Operating the climate control system
133Climate control

X
Only vehicles with sliding sunroof: press
the 3 switch to stop the sliding sunroof.
The sliding sunroof stops.
X Then, to open the sliding sunroof, pull back on
the 3 switch.
Notes on the automatic reversing feature for:
R the side windows (Y page 95)
R the sliding sunroof (Y page 99)
X Convenience opening feature: press and
hold the grocker switch up or down until
the side windows or the sliding sunroof start
to open automatically.
The indicator lamp above the grocker
switch goes out. Air-recirculation mode is
deactivated. Switching the residual heat on/off
General notes The residual heat function is available only with
THERMOTRONIC automatic climate control andTHERMATIC automatic climate control with aux-
iliary heating.
When the engine is switched off, it is possible to
make use of the residual heat of the engine to
continue heating or ventilating the front com-
partment of the vehicle for approximately
30 minutes. The heating or ventilation time
depends on the set interior temperature.
Activating/deactivating X
Turn the key to position 0in the ignition lock
or remove it (Y page 144).
X To switch on: press the!rocker switch
up or down.
The indicator lamp above the !rocker
switch lights up.
The blower will run at a low speed regardless of the airflow setting.
If you switch on the residual heat function at
high temperatures, only the ventilation will be
activated. The blower runs at medium speed. X
To switch off: press the!rocker switch
up or down.
The indicator lamp above the !rocker
switch goes out.
Residual heat is switched off automatically:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops
R when the auxiliary heating is switched on perfume atomiser
Operating the perfume atomiser G
WARNING
If children open the vial, they could drink the
perfume or it could come into contact with
their eyes. There is a risk of injury. Do not
leave children unsupervised in the vehicle.
If the perfume liquid has been drunk, consult
a doctor. If perfume comes into contact with
your eyes or skin, rinse the eyes with clean
water. If you continue to experience difficul-
ties, consult a doctor. H
Environmental note Full vials must not be dis-
posed of with household
waste. They must be collec-
ted separately and disposed
of in an environmentally
responsible recycling sys-
tem.
Dispose of full vials in an
environmentally responsible
manner and take them to a
harmful substance collec-
tion point.Operating the climate control system
135Climate control Z