key MERCEDES-BENZ GLS 2018 Service Manual

R
after the EASY-ENTRY/EXIT feature has
been used R
after the cargo compartment enlargement
has been folded forwards
G WARNING
The seat does not engage in the entry/exit
position. The seat could fold back suddenly,
e.g. when accelerating, braking, changing
direction suddenly or in the event of an acci-
dent. Persons in the sweep of the seat could
become trapped. There is a risk of injury.
Always fold back a seat which has been folded
forwards before you pull away. Make sure that
the seat and backrest engage fully.
G WARNING
Children could become trapped if they adjust
the seats, particularly when unattended.
There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
G WARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the
seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat.
Adjusting the backrest angle (second
row of seats) You can adjust the angle of the backrests in the
second row of seats. There are ten detent posi-
tions to choose from. X
Pull the left or right release lever D upwards
in the direction of the arrow until relevant
backrest C is fully released. X
Pull backrest C forwards in the direction of
the arrow and allow it to engage. X
To ensure that the backrest has engaged, lean
firmly against backrest C .
Folding the seats up/down (third row of
seats) General notes
! Make sure that there is nothing on the fol-
ded-down seats in the cargo compartment.
The cargo compartment must be empty for
the third row of seats to be folded up. The
seats or the objects in the cargo compart-
ment could otherwise be damaged.
Make sure that the seats in the third row are
empty and not blocked before folding them
down.
The third row of seats consists of two electrically
foldable individual seats, which can be lowered
into the cargo compartment.
If the seat is not correctly locked in position, the
display message: 3rd Seat Row, Right Not
Locked appears in the multifunction display.
If you fold the seat back until it engages, the
display message disappears.
Pull the backrest firmly to ensure that it is fully
engaged.
The switches for folding the left or right-hand
seats up and down are marked: L for the left-
hand seat when viewed in the direction of travel,
R for the right-hand seat when viewed in the
direction of travel. Seats 101
Seats, steering wheel and mirrors Z

Rear seat s
The three red indicator lamp s in th e butto n indicat e th e heating level you hav e selected.
The system automatically switches down from level 3 to level 2 after approximately eigh t minutes.
The system automatically switches down from level 2 to level 1 after approximately te n minutes.
The system automatically switches off approximately 35 minute s after it is set to level 1 .X
Turn th e SmartKey to position G or H in th e ignition loc k ( Y
page 140).X
To switch on: press butto n C repeatedly until th e desired heating level is set .X
To switch off : press butto n C repeatedly until all th e indicator lamp s go out .
i If th e battery voltag e is to o low, th e seat heating may switch off .
Activating/deactivating seat ventilation
The three blue indicator lamp s in th e buttons indicat e th e blowe r setting you hav e selected.X
Turn th e SmartKey to position G or H in th e ignition loc k ( Y
page 140).X
To switch on: press butto n C repeatedly until th e desired blowe r setting is set .X
To switch off : press butto n C repeatedly until all th e indicator lamp s go out .
i If th e battery voltag e is to o low, th e seat ventilation may switch off .
i You can open th e side windows and th e sliding sunroo f usin g th e "Convenience opening " feature
( Y
page 90) . The seat ventilation of th e driver' s seat automatically switches to th e highest level.Seats 107
Seats, steering wheel and mirrors Z

Problems with the seat heating or seat ventilation Problem
Possible causes/consequences and P Solutions
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 defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating or seat
ventilation will switch back on automatically.
Steering wheel
Important safety notes
G WARNING
You could lose control of your vehicle if you do
the following while driving: R
adjust the driver's seat, head restraint,
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 mirror and fasten your seat belt
before starting the engine.
G WARNING
Children could injure themselves if they
adjust the steering wheel. There is a risk of
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
The electrically adjustable steering wheel can
still be adjusted when there is no SmartKey in
the ignition lock.
Adjusting the steering wheel man-
ually
G WARNING
If the steering wheel is unlocked while the
vehicle is in motion, it could change position
unexpectedly. This could cause you to lose control of the vehicle. There is a risk of an
accident.
Before starting off, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion.
C
Release lever D
Adjusts the steering wheel height

Adjusting the steering wheel elect ri -
cally
C
Adjusts th e steering whee l heightD
Adjusts th e steering whee l position (fore-
and-af t adjustment)
The steering whee l can also be adjusted when
th e SmartKey is remove d from th e ignition lock.
i Further relate d subjects :R
EASY-ENTRY/EXIT feature ( Y
page 109)R
Storing setting s ( Y
page 113) Steering wheel heating
Switching on/off X
Turn th e SmartKey to position H in th e igni-
tion loc k ( Y
page 140). X
To switch on/off: tur n th e lever in th e direc -
tion of arrow C or D .
Indicato r lamp

When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
G WARNING
If you drive off while the EASY-ENTRY/EXIT
feature is making adjustments, you could lose
control of the vehicle. There is a risk of an
accident.
Always wait until the adjustment process is
complete before driving off.
The EASY-ENTRY/EXIT feature makes getting in
and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature in the on-board computer
( Y
page 244).
Position of the steering wheel when the
EASY-ENTRY/EXIT feature is active The steering wheel swings up when you: R
remove the SmartKey from the ignition lock. R
open the driver's door and KEYLESS-GO is in
position G .R
open the driver's door and the SmartKey is in
position

G WARNING
The exterior mirror on the front-passenger
side reduces the size of the image. Visible
objects are actually closer than they appear.
This means that you could misjudge the dis-
tance from road users traveling behind, e.g.
when changing lane. There is a risk of an acci-
dent.
For this reason, always make sure of the
actual distance from the road users traveling
behind by glancing over your shoulder.
X
Turn the SmartKey to position G or H in the
ignition lock ( Y
page 140).X
Exterior mirror on the driver's side: press but-
ton C .
Exterior mirror on the front-passenger side:
press button D .
The indicator lamp in the corresponding but-
ton lights up in red.
The indicator lamp goes out again after some
time. You can adjust the selected exterior
mirror using button

X
Adjust the seat ( Y
page 98).X
On the driver's side, adjust the steering wheel
( Y
page 109) and the exterior mirrors
( Y
page 110).X
Press memory button M and then press mem-
ory position button 1 , 2 or 3 within three sec-
onds.
The settings are stored in the selected preset
position. A tone sounds when the settings
have been completed.
The memory function can still be used if the
SmartKey has been removed.
Calling up a stored setting X
Press and hold the relevant storage position
button 1 , 2 or 3 until the seat, steering wheel
and exterior mirrors are in the stored position.
The setting procedure is interrupted as soon as
you release the storage position buttons.114
Memory function
Seats, steering wheel an d mirrors

The daytime running lamps improve the visibility
of your vehicle during the day. To do this, the
daytime running lamps function must be
switched on using the on-board computer
( Y
page 243).
If the engine is running and you turn the light
switch to ` or X , the manual settings
take precedence over the daytime running
lamps.
Low-beam headlamps Even if the light sensor does not detect that it is
dark, the parking lamps and low-beam head-
lamps switch on when the ignition is switched on
and the light switch is set to the X position.
This is a particularly useful function in the event
of rain and fog. X
To switch on the low-beam headlamps:
turn the SmartKey to position H in the igni-
tion lock or start the engine. X
Turn the light switch to X .
The green X indicator lamp in the instru-
ment cluster lights up.
Rear fog lamp The rear fog lamp improves visibility of your
vehicle for the traffic behind in the event of thick
fog. Please take note of the country-specific
regulations for the use of rear fog lamps. X
To switch on the rear fog lamp: turn the
SmartKey to position H in the ignition lock or
start the engine. X
Turn the light switch to X or q .X
Press the ^ button.
The yellow ^ indicator lamp in the instru-
ment cluster lights up. X
To switch off the rear fog lamp: press the
^ button.
The yellow ^ indicator lamp in the instru-
ment cluster goes out.
Parking lamps
! If the battery charge is very low, the parking
lamps or standing lamps are automatically
switched off to enable the next engine start.
Always park your vehicle safely and in a well lit
area, in accordance with the relevant legal
stipulations. Avoid using the ` parking
lamps over a period of several hours. If pos-
sible, switch on the right-hand d or left-
hand c standing lamps. X
To switch on: turn the light switch to ` .
The green ` indicator lamp in the instru-
ment cluster lights up.
Standing lamps Switching on the standing lamps ensures the
corresponding side of t he vehicle is illuminated.X
To switch on the standing lamps: the
SmartKey should not be in the ignition lock or
in key position

Replacing the rear window wiper blade Removing a wiper blade X
Remove the SmartKey from the ignition lock. X
Fold wiper arm C away from the rear window
until it engages. X
Position wiper blade D at a right angle to
wiper arm C . X
Hold wiper arm C and press wiper blade D
in the direction of the arrow until it releases. X
Remove wiper blade D .
Installing a wiper blade X
Place new wiper blade D onto wiper arm C .X
Hold wiper arm C and press wiper blade D
in the opposite direction to the arrow until it
engages. X
Make sure that wiper blade D is seated cor-
rectly. X
Position wiper blade D parallel to wiper
arm C . X
Fold wiper arm C back onto the rear window.
Problems with the windshield wipers Problem
Possible causes/consequences and P Solutions
The windshield wipers
are jammed. Leaves or snow, for example, may be obstructing the windshield wiper
movement. The wiper motor has been deactivated. X
For safety reasons, you should remove the SmartKey from the igni-
tion lock.
or X
Switch off the engine using the Start/Stop button and open the
driver's door. X
Remove the cause of the obstruction. X
Switch the windshield wipers back on.
The windshield wipers
fail completely. The windshield wiper drive is malfunctioning. X
Select another wiper speed on the combination switch. X
Have the windshield wipers checked at a qualified specialist work-
shop.124
Windshield wipers
Lights and windshield wipers

Overview of climate control systems
General notes Observe the settings recommended on the fol-
lowing pages. The windows could otherwise fog
up.
To prevent the windows from fogging up: R
switch off climate control only briefly R
switch on air-recirculation mode only briefly R
switch on the cooling with air dehumidifica-
tion function R
switch on the defrost windshield function
briefly, if required
Climate control regulates the temperature and
the humidity in the vehicle interior and filters
undesirable substances out of the air.
The residual heat function can only be activated
or deactivated with the ignition switched off
( Y
page 135).
i Ventilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature ( Y
page 90). This will speed
up the cooling process and the desired inte-
rior temperature will be reached more
quickly. If you start the engine using your smartphone,
the last selected climate control setting is reac-
tivated ( Y
page 142).
i The integrated filter filters out most parti-
cles of dust and soot and completely filters
out pollen. It also reduces gaseous pollutants
and odors. A clogged filter reduces the
amount of air supplied to the vehicle interior.
Depending on the operating conditions and
environmental influences, the interval for
replacing the filter may be shorter than speci-
fied.
i Vehicles with ionization of the interior
air and air filter: in addition to ionization, the
vehicle has an air filter with anti-allergenic
properties that contribute to improved air fil-
tration.
i It is possible that under certain circumstan-
ces the residual heat function may be activa-
ted automatically an hour after the SmartKey
has been removed in order to dry the auto-
matic climate control. The vehicle is then ven-
tilated for 30 minutes.
Control panel for dual-zone automatic climate control
USA only
Front control panel
C
Sets the temperature, left ( Y
page 132)
D
Defrosts the windshield ( Y
page 133)Overview of climate control systems 125
Climate control