key MERCEDES-BENZ G-CLASS 2018 Service Manual

Interior lighting
Overview of interior lighting
Front overhead control panel
:p Switches th eleft-han dfron treading
lamp on/off
;t Switches th ecargo compartmen t
lamp/rear compartmen tlighting on/off
=p Switches th eright-hand fron treading
lamp on/off
?| Switches th efron tinterio rlighting /
automatic interio rlighting control off
ASwitches th eautomatic interio rlighting con-
trol on
Bc Switches th efron tinterio rlighting on
Rear-compartment overhead control
panel
:p Switches th eright-hand reading lamp
on/off
;p Switches th eleft-han dreading lamp
on/off
Interior lighting control
General notes
In order to preven tth evehicle's battery from
discharging, th einterior lighting function sare
automatically deactivated after som etime
except for when th eSmartKey is in position 2
in th eignition lock.
The brightness of th einstrumen tcluste rlighting
may be set usin gth econtroller on th einstru-
men tcluste r (
Ypage 160).
Automatic interior lighting control
XTo switch on: moveswitch Ato th ecenter
position (Ypage 89) .
The interior lighting automatically switches on if
you:
Runlock th evehicl e
Ropenadoor
Rremove th eSmartKey from th eignition loc k
XTo switch off :set switch Ato th e|
position . (Ypage 89).
The interior lighting remain sswitched off eve nif
you:
Runlock th evehicl e
Ropenadoor
Rremove th eSmartKey from th eignition loc k
The interior lighting is switched on for aset time
when th eSmartKey is remove dfrom th eignition
lock. You can activat ethis delaye dswitch-off
usin gth eon-board computer (
Ypage 169).
When afron tdoor is opened, th efron tinterior
lighting comes on .When arear door is opened,
th erear interior lights comes on .In addition ,th e
courtesy lights come on .
iIfadoor remain sopen and th eSmartKey is
no tin th eignition lock, th einterior lighting
switches off after ashort while .
Replacing bulbs
Important safety notes
GDANGER
Xenon bulbs carry ahigh voltage. You can get
an electric shock if you remove th ecover of
Replacing bulbs89
Lights and windshield wipers
Z

Switching the rear window wiper on/
off
:èSwitch
2bWipes with washer fluid
3ISwitches on intermittent wiping
40 Switches off intermittent wiping
5b Wipes with washer fluid
XTurn the SmartKey to position 1or2 in the
ignition lock.
XTurn switch :on the combination switch to
the corresponding position.
When the rear window wiper is switched on,
the icon appears in the instrument cluster.
The rear window wiper comes on automatically
if you shift the automatic transmission to posi-
tion kwhile the windshield wipers are on.
Replacing the wiper blades
Important safety notes
GWARNING
If the windshield wipers begin to move while
you are changing the wiper blades, you could be trapped by the wiper arm. There is a risk of
injury.
Always switch off the windshield wipers and
ignition before changing the wiper blades.
!To avoid damaging the wiper blades, make
sure that you touch only the wiper arm of the
wiper.
!Never open the hood if a windshield wiper
arm has been folded away from the wind-
shield. Never fold a windshield wiper arm without a
wiper blade back onto the windshield/rear
window.
Hold the windshield wiper arm firmly when
you change the wiper blade. If you release the
windshield wiper arm without a wiper blade
and it falls onto the windshield, the windshield
may be damaged by the force of the impact.
Mercedes-Benz recommends that you have
the wiper blades changed at a qualified spe-
cialist workshop.
Removing the wiper blades
XRemove the SmartKey from the ignition lock.
XFold wiper arm :away from the windshield
until it engages.
XPosition wiper blade ;horizontally.
XPress locking spring ?.
XSlide wiper blade;with hinge piece =from
wiper arm :.
Installing the wiper blade
XSlide wiper arm :into new wiper blade ;
with hinge piece =.
XEngage spring clip ?into the end of the wiper
arm.
94Windshield wipers
Lights and windshield wipers

XMake sure that wiper blade;is seated cor-
rectly.
XFold wiper arm :back onto the windshield.
Problems with the windshield wipers
ProblemPossible causes/consequences and MSolutions
The windshield wipers
are jammed.Leaves or snow, for example, are obstructing windshield wiper move-
ment. The wiper motor has been deactivated.
XSwitch off the engine.
XRemove the SmartKey from the ignition lock.
XRemove the cause of the obstruction.
XSwitch the windshield wipers back on.
The windshield wipers
fail completely.The windshield wiper drive is malfunctioning.
XSelect another wiper speed on the combination switch.
XHave the windshield wipers checked at a qualified specialist work-
shop.
The windshield washer
fluid from the spray noz-
zles no longer hits the
center of the windshield.The spray nozzles are misaligned.
XHave the spray nozzles adjusted at a qualified specialist workshop.
Windshield wipers95
Lights and windshield wipers
Z

since no fresh air is drawn into the vehicle in
air-recirculation mode.
ECO start/stop function
During automatic engine switch-off, the climate
control system only operates at a reduced capa-
city. If you require the full climate control output,
you can switch off the ECO start/stop function
by pressing the ECO button (
Ypage 108).
Operating the climate control system
Activating/deactivating climate con-
trol
General notes
When the climate control is switched off, the air
supply and air circulation are also switched off. The windows could fog up. Therefore, switch off
climate control only briefly.
Activate climate control primarily using the
Ã
button (
Ypage 99).
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to auto-
matic mode.
XTo deactivate: press the^button.
The indicator lamp in the ^button lights
up.
Switching cooling with air dehumidification on/off
General notes
If you deactivate the "Cooling with air-dehumidification" function, the air inside the vehicle will not
be cooled. The air inside the vehicle will also not be dehumidified. The windows can fog up more
quickly. Therefore, only deactivate the "Cooling with air-dehumidification" function briefly.
The "Cooling with air dehumidification" function is only available when the engine is running.
The air inside the vehicle is cooled and dehumidified according to the temperature selected.
Condensation may drip from the underside of the vehicle when it is in cooling mode. This is normal
and not a sign that there is a malfunction.
Activating/deactivating
XTo activate: press the¿orÁ button.
The indicator lamp in the ¿orÁ button lights up.
XTo deactivate: press the¿orÁ button.
The indicator lamp in the ¿orÁ button goes out. The "Cooling with air dehumidification"
function has a delayed switch-off feature.
Problems with the "Cooling with air dehumidification" function
!If the cooling with air dehumidification does not switch on, it is possible that the climate control
system has lost coolant.
Have the cooling with air dehumidification checked at a qualified specialist workshop.
98Operating the climate control system
Climate control

ProblemPossible causes/consequences andMSolutions
The indicator lamp in the
¿orÁ button
flashes three times or
remains off. The "Cool-
ing with air dehumidifi-
cation" function cannot
be switched on.Cooling with air dehumidification has been deactivated due to a mal-
function.
XVisit a qualified specialist workshop.
Setting climate control to automatic
General notes
In automatic mode, the set temperature is main-
tained at a constant level. The system automat-
ically regulates the temperature of the dis-
pensed air, the airflow and the air distribution.
Automatic mode works best when cooling with
air dehumidification is also activated. If neces-
sary, cooling with air dehumidification can be
deactivated.
Automatic control
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XSet the desired temperature.
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow are
activated.
XTo deactivate: press the_button.
or
XPress the IorK button.
The indicator lamp in the Ãbutton goes
out.
XTo switch to manual mode: press the_
button.
Setting the temperature
Different temperatures can be set for the driv-
er's and front-passenger sides.
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XAdjust control :orB (Ypage 96) to the
desired temperature.
Only change the temperature setting in small
increments. Start at 72 ‡ (22 †).
Setting the air distribution
Air distribution settings
P Directs air through the center and side air
vents
O Directs air through the footwell air vents
S Directs air through the center, side and
footwell vents
¯ Directs air through the defroster vents
b Canada only: directs the airflow through
the defroster, center and side air vents.
a Directs air through the defroster and
footwell vents
_ Canada only: directs the airflow through
the defroster, center and footwell air
vents.
Setting
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XPress the _button repeatedly until the
desired symbol appears in the display.
Setting the airflow
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XTo increase: press theKbutton.
XTo reduce: press theIbutton.
iThe airflow from the rear-compartment
vents and the center vents is the same.
Operating the climate control system99
Climate control

Switching the ZONE function on/off
XTo switch on:press theábutton.
The indicator lamp in the ábutton lights
up.
The temperature setting for the driver's side
is not adopted for the front-passenger side
and the rear compartment. The temperature
for the front-passenger side and the rear com-
partment is set separately.
XTo switch off: press theábutton.
The indicator lamp in the ábutton goes
out.
The temperature setting for the driver's side
is adopted for the front-passenger side and
the rear compartment.
Defrosting the windshield
General notes
You can use this function to defrost the wind-
shield or to defrost the inside of the windshield
and the side windows.
Switch off the "Windshield defrosting" function
as soon as the windshield is clear again.
Activating/deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XTo activate: press the¬button.
The indicator lamp in the ¬button lights
up.
The climate control system switches to the
following functions:
Rcooling with air dehumidification on
Rhigh airflow
Rhigh temperature
Rair distribution to the windshield and front
side windows
Rair-recirculation mode off
XTo deactivate: press the¬button.
The indicator lamp in the ¬button goes
out. The previously selected settings are
restored. The cooling with air dehumidifica-
tion function remains on. Air-recirculation
mode remains deactivated.
Activating/deactivating MAX COOL
maximum cooling
The MAX COOL function is only available in vehi- cles for the USA.
MAX COOL is only operational when the engine
is running.
XTo activate: press theÙbutton.
The indicator lamp in the button lights up.
XTo deactivate: press theÙbutton.
The indicator lamp in the Ùbutton goes
out. The previously selected settings are
restored.
When you activate MAX COOL, the following
functions are also switched on:
Rmaximum cooling
Rmaximum airflow
Rair-recirculation mode
Defrosting the windows
Windows fogged up on the inside
XActivate the Ácooling with air dehumidi-
fication function.
XActivate the Ãautomatic mode.
XIf the windows continue to fog up, activate the
"Windshield defrosting" function
(
Ypage 100).
iYou should only select this setting until the
windshield is clear again.
Windows fogged up on the outside
XSwitch on the windshield wipers (Ypage 93).
XPress the _button repeatedly until the
P orO symbol appears in the display.
iYou should only select this setting until the
windshield is clear again.
iIf you clean the windows regularly, they do
not fog up so quickly.
100Operating the climate control system
Climate control

Activating/deactivating windshield
heating
XTurn theSmartKey to position 2
(Ypage 105) in th eignition loc k .
XTo activate: press button;.
Indicato rlamp :lights up.
XTo deactivate: press button;.
Indicato rlamp :goe sout . At outside temperatures abov
e50 ‡(10 †) the
windshield heating cannot be switched on. Indi-
cator lamp :lights up briefly when you attempt
to activate it and then goes out again.
The windshield defroster has a high current
draw. You should therefore switch it off as soon
as the windshield is clear. Otherwise, the wind-
shield heating switches off automatically after
ten minutes.
When the windshield heating is switched on for
the fourth time in a row, windshield heating
switches off automatically after five minutes.
Indicator lamp :flashes if too many electrical
consumers are switched on at the same time
when the battery voltage is low. After approx-
imately 30 seconds the windshield heating
switches off automatically.
Switching the rear window defroster on/off
General notes
The rear window defroster has a high current draw. You should therefore switch it off as soon as the
rear window is clear. Otherwise, the rear window defroster switches off automatically after several
minutes.
If the battery voltage is too low, the rear window defroster may switch off.
Activating/deactivating
XTurn the SmartKey to position 2in the ignition lock (Ypage 105).
XPress the ¤button.
The indicator lamp in the ¤button lights up or goes out.
Problems with the rear window defroster
ProblemPossible causes/consequences and MSolutions
The indicator lamp in the
¤button flashes.The on-board voltage is too low.
XSwitch off any consumers that are not required, e.g. reading lamps,
interior lighting or the seat heating.
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated.The battery has not been sufficiently charged.
XSwitch off any consumers that are not required, e.g. reading lamps,
interior lighting or the seat heating.
Operating the climate control system101
Climate control

Switching air-recirculation mode
on/off
General notes
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
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 105).
XTo activate: press thedbutton.
The indicator lamp in the dbutton lights
up.
iAir-recirculation mode is automatically acti-
vated at high levels of pollution or at high out-
side temperatures. When air-recirculation
mode is activated automatically, the indicator
lamp in the dbutton is not lit.
Outside air is added after about 30 minutes.
XTo deactivate: press thedbutton.
The indicator lamp in the dbutton goes
out.
iAir-recirculation mode switches off auto-
matically:
Rafter approximately five minutes at outside
temperatures below approximately 41 ‡
Rafter approximately five minutes if cooling
with air dehumidification is deactivated
Rafter approximately 30 minutes at outside
temperatures above approximately 41 ‡
(5 †)
Switching the residual heat on or off
General notes
The residual heat function is only available on
vehicles for Canada.
It is possible to make use of the residual heat of
the engine to continue heating the stationary
vehicle for up to 30 minutes after the engine has
been switched off. The heating time depends on the set interior temperature.
Activating/deactivating
XTurn the SmartKey to position gin the igni-
tion lock (Ypage 105) or remove it.
XTo activate: press theÁbutton.
The indicator lamp in the Ábutton lights
up.
iThe blower will run at a low speed regardless
of the airflow setting.
iIf you activate the residual heat function at
high temperatures, only the ventilation will be
activated.
XTo deactivate: press theÁbutton.
The indicator lamp in the Ábutton goes
out.
Residual heat is deactivated automatically:
Rafter approximately 30 minutes
Rwhen the ignition is switched on
Rif the battery voltage drops
Rif the coolant temperature is too low
Air vents
Important safety notes
GWARNING
Very hot or very cold air can flow from the air
vents. This could result in burns or frostbite in
the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
Rkeep the air inlet between the windshield and
the hood free of blockages, such as ice, snow or leaves.
Rnever cover the air vents or air intake grilles in
the vehicle interior.
iFor virtually draft-free ventilation, adjust the
sliders of the air vents to the center position.
iIf the automatic climate control constantly
differs from the set temperature or if unde-
102Air vents
Climate control

There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals.
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 the parking brake has not been fully
released when driving, the parking brake can:
Roverheat and cause a fire
Rlose its hold function.
There is a risk of fire and an accident. Release
the parking brake fully before driving off.
!Warm up the engine quickly. Do not use the
engine's full performance until it has reached
operating temperature.
Only shift the automatic transmission to the
desired drive position when the vehicle is sta-
tionary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
!Avoid high engine speeds when the engine
is cold. The engine's service life could other-
wise be significantly shortened. Do not use
the engine's full performance until it has
reached operating temperature.
!Mercedes-AMG vehicles: at low engine oil
temperatures below 68 ‡ (+20 †), the max-
imum engine speed is restricted in order to
protect the engine. To protect the engine and
maintain smooth engine operation, avoid driv-
ing at full throttle when the engine is cold.
Key positions
gTo remove the SmartKey
1Power supply for some consumers, such as
the windshield wipers
2Ignition (power supply for all consumers)
and drive position
3To start the engine
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up. If an indicator lamp does not go out after
starting the engine or lights up while driving, see
(
Ypage 193).
If the SmartKey is in position gin the ignition
lock for a longer period, it can no longer be
turned in the ignition lock. The steering is then
locked. To unlock, remove the SmartKey and
reinsert it into the ignition lock.
The steering is locked when you remove the
SmartKey from the ignition lock.
XRemove the SmartKey when the engine is
switched off.
The starter battery could otherwise be dis-
charged.
If you cannot turn the SmartKey in the ignition
lock, the starter battery may not be charged
sufficiently.
XCheck the starter battery and charge it if nec-
essary (Ypage 248).
or
XJump-start the vehicle (Ypage 249).
You can only remove the SmartKey if:
Rthe SmartKey is in position gin the ignition
lock
Rthe automatic transmission selector lever is
in j
Driving105
Driving and parking
Z

Starting the engine
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park position P
RStart 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.
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.
GWARNING
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.
!Do not depress the accelerator when start-
ing the engine.
Starting procedure
XShift the automatic transmission to position
j.
XMake sure that the parking brake is applied.
XTurn the SmartKey to position 3in the igni-
tion lock (Ypage 105) and release it as soon
as the engine is running.
You can also use the touch-start function. To do
this, turn the SmartKey to position 3
(
Ypage 105) and release it immediately. The
engine then starts automatically.
Pulling away
General notes
GWARNING
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.
!Do not depress the accelerator pedal while
depressing the brake pedal. This impairs
engine performance and results in premature
wear on the brake system and drivetrain.
!If a warning tone sounds and the ReleasePark. Brakemessage appears in the multi-
function display, the parking brake is still
applied. Release the parking brake.
Depress the accelerator carefully when pulling
away.
The vehicle locks centrally once you have pulled
away. The locking knobs in the doors drop down.
You can open the doors from the inside at any
time.
You can also deactivate the automatic locking
feature (
Ypage 170).
It is possible to shift the transmission from posi-
tion jto the desired position only if you
depress the brake pedal. Only then is the selec-
tor lever lock released.
iUpshifts take place at higher engine speeds
after a cold start. This helps the catalytic con-
106Driving
Driving and parking