2018 MERCEDES-BENZ GLC light

High-beam headlamps X
Switch off the lights. X
Open the hood. X
Turn housing cover C counter-clockwise and
remove it. X
Push bulb holder D upwards and pull out.X
Pull defective bulb out of bulb holder D .X
Insert new bulb into bulb holder D .X
Insert bulb holder D into groove with lug at
top. X
Push bulb holder D down until it engages
audibly. X
Press on housing cover C and turn it clock-
wise.
Turn signals
X
Remove the cover in the front wheel housing
( Y
page 118).X
Turn bulb holder C counter-clockwise using
the grip under the headlamp casing and
remove it downwards with bulb. X
Turn defective bulb counter-clockwise and
remove it from bulb holder C .X
Insert new bulb into bulb holder C . X
Insert bulb holder C , turn it clockwise and
lock. X
Replace the cover in the front wheel housing
( Y
page 118).
Removing and installing the cover in the
front wheel housing You must remove the cover of the front wheel
housing before you can change the front turn
signal lamp.
X
To remove: switch off the lights. X
Turn the front wheels inwards. X
Turn rotary knob C 180° outwards until it
stops using a suitable object.
Cover D is released. X
Fold cover D up. X
To install: insert cover D into the left, right
and two lower catches. X
Turn rotary knob C 180° inwards until it
stops using a suitable object.
Cover D is locked.118
Replacing bulbs
Lights and windshield wipers

Replacing rear bulbs (vehicles with
halogen headlamps)
Opening and closing the side trim pan-
els
Example: right-hand side paneling
You must open the side trim panel in the cargo
compartment before you can replace the bulbs
in the tail lamps. X
To open: release right or left side trim
panel C at the top and fold it down in the
direction of the arrow. X
To close: insert side trim panel C .
Rear lamp cluster
Changing the backup lamp Due to their location, have the bulbs in the
backup lamp in the tailgate replaced at a quali-
fied specialist workshop. X
Switch off the lights. X
Open the tailgate.
Example: right-hand side handle X
In recess

Activating/deactivating X
Press th e Z rocke r switch up or down .
The indicator lamp abov e th e rocke r switch lights up or goe s out .
Problems with the "Cooling with air dehumidification" function Problem
Possible causes/consequences and P Solutions
The indicator lamp abov e
th e Z rocke r switch
remain s off . The coolin g
wit h air dehumidification
function canno t be acti-
vated via th e multimedia
system any longer
( Y
page 285). Cooling wit h air dehumidification has been deactivated due to a mal-
function . X
Visit a qualified specialis t workshop .
Setting climate cont rol to automatic
Gene ra l notesIn automatic mode, th e set temperature is main -
taine d automatically at a constan t level. The
system automatically regulates th e temperature
of th e dispensed air, th e airflow and th e air dis-
tribution .
During automatic controlling, th e "Cooling wit h
air dehumidification " function is activated.
Aut oma tic cont rolX
Turn th e SmartKey to position H in th e igni-
tion loc k ( Y
page 136).X
To activate: press th e X rocke r switch up
or down .
The indicator lamp abov e th e X rocke r
switch lights up. X
Se t th e desired temperature usin g th e

Activating/deactivating Dual-zone automatic climat e controlX
Press th e 0 rocke r switch up or down .
The indicator lamp abov e th e 0 rocke r
switch lights up or goe s out .
The synchronization function deactivates if th e
setting s for th e front-passenger side are
changed.
3-zone automatic climat e controlX
Activat e or deactivat e th e "Synchronization "
function usin g th e multimedia system
( Y
page 285).
The synchronization function is deactivated: R
if th e setting s for th e front-passenger side are
changed R
th e setting s for th e rear compartmen t are
changed
Defrosting the windshield
Gene ra l notesYou can use this function to defros t th e wind-
shield or to clear a fogged up windshield or fron t
side windows on th e inside.
Switc h off th e "Windshield defrosting " function
as soo n as th e windshield is clear again .
Switching the "Windshield def ros ting"
function on or offX
Turn th e SmartKey to position H in th e igni-
tion loc k ( Y
page 136).X
To switch on: press rocke r switch d on
th e fron t control uni t up or down .
The indicator lamp abov e th e d rocke r
switch lights up. The curren t climat e control
setting s are deactivated.
The climat e control system switches to th e
followin g functions:R
high airflow R
high temperature R
air distribution to th e windshield and fron t
side windows R
air-recirculation mod e off
i If necessary, th e "Cooling wit h air dehumid -
ification " function is activated. In this case, th e indicator lamp abov e th e Z rocke r
switch remain s switched off .X
To switch off : press rocke r switch d up or
down .
The indicator lamp abov e th e d rocke r
switch goes out . The previously selected set -
ting s are restored . Air-recirculation mod e
remain s deactivated.
Defrosting the windows
Windows fogged up on the inside X
Activat e th e "Cooling wit h air dehumidifica-
tion " function wit h th e Z rocke r switch .X
Switc h on automatic mod e usin g th e X
rocke r switch . X
If th e windows continu e to fog up, activat e th e
"Windshield defrosting " function usin g th e
d rocke r switch .
i You should only select this setting until th e
windshield is clear again .
Windows fogged up on the outside X
Activat e th e windshield wipers. X
Switc h on automatic mod e usin g th e X
rocke r switch .
i If you clean th e windows regularly, they do
no t fog up so quickly.
Rear wind ow def ros ter
Gene ra l notesThe rear window defroste r has a high curren t
draw . You should therefor e switch it off as soo n
as th e rear window is clear. Otherwise , th e rear
window defroste r switches off automatically
after several minutes.
If th e battery voltag e is to o low, th e rear window
defroste r may switch off .
Acti vating/deactivating X
Turn th e SmartKey to position H in th e igni-
tion loc k ( Y
page 136). X
Press rocke r switch l up or down .
The indicator lamp abov e rocke r switch l
lights up or goes out .130
Operating the climate control systems
Climate control

Problems with the rear window defroster Problem
Possible causes/consequences and P Solutions
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated. 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 defroster
can be activated again.
Switching air-recirculation mode
on/off
General notes You can also temporarily deactivate the flow of
fresh air manually if unpleasant odors are enter-
ing the vehicle from outside. The air already
inside the vehicle will then be recirculated.
If you switch on air-recirculation mode, the win-
dows can fog up more quickly, in particular at
low temperatures. Only use air-recirculation
mode briefly to prevent the windows from fog-
ging up.
Activating/deactivating X
Turn the SmartKey to position H in the igni-
tion lock ( Y
page 136).X
To activate: press the r rocker switch up
or down.
The indicator lamp above the r rocker
switch lights up.
Air-recirculation mode switches on automati-
cally: R
at high outside temperatures R
at high levels of pollution (3-zone automatic
climate control only) R
in a tunnel (vehicles with a navigation system
only)
The indicator lamp above the r rocker
switch is not lit when automatic air-recirculation
mode is activated. Outside air is added after
about 30 minutes. X
To deactivate: press the r rocker switch
up or down.
The indicator lamp above the r rocker
switch goes out. Air-recirculation mode deactivates automati-
cally: R
after approximately five minutes at outside
temperatures below approximately 41 ‡
(5 †) R
after approximately five minutes if cooling
with air dehumidification is deactivated R
after approximately 30 minutes at outside
temperatures above approximately 41 ‡
(5 †) if the "Cooling with dehumidification"
function is activated
Switching the residual heat on or off
General notes The residual heat function is only available with
3-zone automatic climate control.
Once 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 interior temperature that has
been set.
Activating/deactivating X
Turn the SmartKey to position

To start the vehicle without actively using the
SmartKey: R
the Start/Stop button must be inserted in the
ignition lock. R
the SmartKey must be in the vehicle. R
the vehicle must not be locked with the
SmartKey or KEYLESS-GO. ( Y
page 79)
Do not keep the SmartKey: R
with electronic devices, e.g. a mobile phone
or another SmartKey. R
with metallic objects, e.g. coins or metal foil. R
inside metallic objects, e.g. a metal case.
This can affect the functionality of the Smart-
Key.
If you lock the vehicle with the SmartKey remote
control or with KEYLESS-GO, after a short time: R
you will not be able to switch on the ignition
with the Start/Stop button. R
you will no longer be able to start the engine
with the Start/Stop button until the vehicle is
unlocked again.
If you lock the vehicle centrally using the button
on the front door ( Y
page 84), you can continue
to start the engine with the Start/Stop button.
The engine can be switched off while the vehicle
is in motion by pressing and holding the Start/
Stop button for three seconds. This function
operates independently of the ECO start/stop
automatic engine switch-off function.
Key positions with the Start/Stop button
C
Start/Stop button
D
Ignition lock
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up. Warning and indicator lamps: see
( Y
page 268). If Start/Stop button C has not yet been
pressed, this corresponds to the SmartKey
being removed from the ignition. X
To switch on the power supply: press
Start/Stop button C once.
The power supply is switched on. You can now
activate the windshield wipers, for example.
The power supply is switched off again if: R
the driver's door is opened and R
you press Start/Stop button C twice when in
this position X
To switch on the ignition: press Start/Stop
button C twice.
The ignition is switched on.
The ignition is switched off again if: R
you do not start the engine from this position
within 15 minutes R
you press Start/Stop button C once when in
this position
The power supply is switched off again if: R
the driver's door is opened and R
you press Start/Stop button C 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 normal
using the SmartKey.
It is possible to switch between Start/Stop but-
ton mode and key operation only when the
transmission is in position ] .X
Remove Start/Stop button C from ignition
lock D .
You do not have to remove the Start/Stop but-
ton from the ignition lock when you leave the
vehicle. You should, however, always take the
SmartKey with you when leaving the vehicle. As
long as the SmartKey is in the vehicle: R
the vehicle can be started using the Start/
Stop button R
the electrically powered equipment can be
operated Driving 137
Driving and parking Z

Starting the engine
Important safety notes
G WARNING
If children are left unsupervised in the vehicle,
they could: R
open the doors, thus endangering other
people or road users. R
get out and disrupt traffic. R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake. R
shifting the automatic transmission out of
park position PR
Start the engine.
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 or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
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.
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 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 ]
( Y
page 146).
The transmission position indicator on the
multifunction display shows ]
( Y
page 148).
i You can start the engine in transmission
position ] and \\ .
Starting procedure with the SmartKey To start the engine using the SmartKey instead
of the Start/Stop button, pull the Start/Stop
button out of the ignition lock. X
Turn the SmartKey to position I in the igni-
tion lock and release it as soon as the engine
is running.
If the engine will not start: X
Remove the SmartKey from the ignition lock. X
Reinsert the SmartKey into the ignition lock
after a short waiting period. X
Turn the SmartKey to position H in the igni-
tion lock ( Y
page 136).
The indicator lamps in the instrument cluster
light up ( Y
page 268). X
Turn the SmartKey to position I in the igni-
tion lock ( Y
page 136) and release it as soon
as the engine is running.
Starting procedure with the Start/Stop
button The Start/Stop button is only available 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 SmartKey
into the ignition lock. The Start/Stop button
must be inserted in the ignition lock and the
SmartKey must be in the vehicle. This mode for
starting the engine operates independently of
the ECO start/stop automatic engine start func-
tion.
You can start the engine if a valid SmartKey is in
the vehicle. Switch off the engine and always138
Driving
Driving and parking

Deactivating or activating th e ECO
start/stop function Mercedes-AMG vehicles X
To deactivate : press EC O butto n C .
Indicator lamp D goe s out .X
To activate : press EC O butto n C .
Indicator lamp D lights up.
If indicator lamp D is off, th e EC O start/sto p
function has bee n switched of f manually or as
th e result of a malfunction . The engin e will then
no t be switched of f automatically when th e vehi-
cl e stops .
The EC O start/sto p function is deactivated, if:R
Mercedes-AMG GLC 43 4MATIC : you switch
to drive program S+ ( Y
page 144)R
Mercedes-AMG GLC 63 4MATIC+: you
switch to drive program S+ or S
( Y
page 144)R
you permanentl y activat e manual gearshiftin g
( Y
page 152)
If you hav e permanentl y activated manual gear -
shiftin g and then press EC O butto n C , th e EC O
start/sto p function is switched on .
All other model s X
To deactivate : press EC O butto n C .
Indicator lamp D goe s out .X
To activate : press EC O butto n C .
Indicator lamp D lights up.
If indicator lamp D is off, th e EC O start/sto p
function has bee n deactivated manually or as
th e result of a malfunction . The engin e will then
no t be switched of f automatically when th e vehi-
cl e stops .
Selecting drive program S+ deactivates th e EC O
start/sto p function . If you press EC O butto n C ,
th e EC O start/sto p function is activated.
AMG Performance adjustable exhaust
syste m (Mercedes-AMG vehicles )The volume of th e AM G Performanc e adjustable
exhaus t syste m changes dependin g on th e posi-
tion of th e switchable exhaus t flap . The exhaus t
fla p is adjusted automatically accordin g to th e
selecte d drive program ( Y
page 144).
You can also adjust th e position of th e exhaus t
fla p and therefore th e volume of th e exhaus t
syste m manually.
The automatic adjustmen t of th e exhaus t flap is
always active when you chang e drive program,
regardles s of th e manual setting .
Each time you start th e engin e wit h th e Smart -
Key or th e Start/Sto p button, th e quietest set -
ting is activated.
Settin g th e volume : X
Press butto n C .
If you selec t th e loudest setting , indicator
lamp lights up D .
Mercedes-AMG GLC 63 4MATIC+/GLC 63 S
4MATIC+: you can preset th e volume of th e
exhaus t system fo r drive program I (Individual) .
Information on DYNAMI C SELECT and on con-142
Driving
Driving and parking