warning MERCEDES-BENZ GLS 2017 Repair Manual

If you drop objects underneath the seats in the
third row, you can remove the panel in order to
reach beneath the seat. X
To open: fold the corresponding seat up or
down ( Y
page 99).X
Once the seat is folded halfway up or down,
briefly press the button again to stop the
automatic movement. X
Grasp the panel recess. X
Pull the panel in the direction of the arrow and
remove it. X
To close: fold the corresponding seat up or
down ( Y
page 99).X
Once the seat is folded halfway up or down,
briefly press the button again to stop the
automatic movement. X
Attach the panel using the guide pins. X
Push the panel downwards until it engages. X
Fold the seat up and down fully to check that
the panel is seated correctly.
Folding down the seats in the second
row manually
Important safety notes
G WARNING
If the seat and backrest are not engaged, they
can fold forwards, e.g. in the event of sudden
braking or an accident. R
This will cause the vehicle occupants to be
forced into the seat belt by a seat or back-
rest which is not engaged. The seat belt can
no longer offer the intended level of pro-
tection and could even cause injuries. R
A child restraint system would no longer be
anchored or positioned correctly and would
not be able to perform its required function. R
The seat backrests cannot restrain objects
or loads in the cargo compartment.
There is an increased risk of injury.
Always make sure that the seat and backrest
are engaged as described: R
before traveling with a passenger on a seat
with the EASY-ENTRY/EXIT feature R
after you have adjusted the seat 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.
General notes Getting into or out of the third row of seats: you
can fold forward the right outer seat in the sec-
ond row of seats.
If the right outer rear seat in the second row of
seats is in the entry/exit position: the display
message: 2nd Seat Row, Right Not Locked
appears in the multifunction display, for exam-
ple.
If you fold the seat back until it engages, the
display message disappears.
Pull the backrest firmly to ensure that it is fully
engaged.
i Further related subjects: R
Cargo compartment enlargement (folding
the second row of seats forwards)
( Y
page 297) R
Folding the seats in the third row forwards/
back ( Y
page 99)
Entry position100
Seats
Seats, steering wheel and mirrors

X
Move the head restraint to the lowest position
( Y
page 97). X
Pull release handle D in the direction of the
arrow to the pressure point and hold it in this
position.
The backrest folds forwards.
You have two options for folding the seat down
fully. X
Pull release handle D again in the direction of
the arrow to the pressure point and hold it in
this position.
or X
Pull on release loop C in the direction of the
arrow and hold in this position. X
Lift up the seat until it folds forwards.
i Vehicles with memory function: the front
seats move forwards slightly.
Entry position
Exit position
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.
i Further related subjects: R
Important safety notes on air bags
( Y
page 46) R
Securing children in the vehicle
( Y
page 57) If you wish to exit the third row of seats, fold
down the outer seat on the right-hand side as
follows.
The release loop for the EASY-ENTRY/EXIT fea-
ture is located at the bottom on the back of the
right outer seat in the second row of seats. X
Pull on release loop C in the direction of the
arrow and hold in this position.
The backrest folds forwards. X
Pull on release loop C again in the direction
of the arrow and hold in this position. X
Lift up the seat until it folds forwards.
i Vehicles with memory function: the front
seats move forwards slightly.
Exit position
i Vehicles with memory function: in order to
return the front seats to the saved position,
call up the saved seat setting using the mem-
ory buttons. Seats 101
Seats, steering wheel and mirrors Z

Moving the outer seats back to the normal
position (second row of seats)
G WARNING
If the seat and backrest are not engaged, they
can fold forwards, e.g. in the event of sudden
braking or an accident. R
This will cause the vehicle occupants to be
forced into the seat belt by a seat or back-
rest which is not engaged. The seat belt can
no longer offer the intended level of pro-
tection and could even cause injuries. R
A child restraint system would no longer be
anchored or positioned correctly and would
not be able to perform its required function. R
The seat backrests cannot restrain objects
or loads in the cargo compartment.
There is an increased risk of injury.
Always make sure that the seat and backrest
are engaged as described: R
before traveling with a passenger on a seat
with the EASY-ENTRY/EXIT feature R
after you have adjusted the seat 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. X
To lock the seat: fold back the seat until it
engages. X
Fold back the backrest until it engages. Folding down the seats in the second
row electrically Important safety notes
G WARNING
If the seat and backrest are not engaged, they
can fold forwards, e.g. in the event of sudden
braking or an accident. R
This will cause the vehicle occupants to be
forced into the seat belt by a seat or back-
rest which is not engaged. The seat belt can
no longer offer the intended level of pro-
tection and could even cause injuries. R
A child restraint system would no longer be
anchored or positioned correctly and would
not be able to perform its required function. R
The seat backrests cannot restrain objects
or loads in the cargo compartment.
There is an increased risk of injury.
Always make sure that the seat and backrest
are engaged as described: R
before traveling with a passenger on a seat
with the EASY-ENTRY/EXIT feature R
after you have adjusted the seat 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.
General notes
To enter or exit the third row of seats: the outer
left and right seats of the second row can be
folded down electrically.102
Seats
Seats, steering wheel and mirrors

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

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 240).
Position of the steering wheel when the
EASY-ENTRY/EXIT feature is active The steering wheel swings upwards when you: R
remove the SmartKey from the ignition lock R
open the driver's door with KEYLESS-GO in
position 1R
open the driver's door and the SmartKey is in
position 0 or 1 in the ignition lock
i The steering wheel only moves upwards if it
has not already reached the upper stop.
Position of the steering wheel for driv-
ing The steering wheel is moved to the last selected
position when: R
the driver's door is closed R
you insert the SmartKey into the ignition lock
or R
you press the Start/Stop button once on vehi-
cles with KEYLESS-GO
When you close the driver's door with the igni-
tion switched on, the steering wheel is also
automatically moved to the previously set posi-
tion.
The last position of the steering column is stored
when you: R
switch the ignition off R
save the setting with the memory function
( Y
page 110). Crash-responsive EASY-EXIT feature If the crash-responsive EASY-EXIT feature is trig-
gered in an accident, the steering column will
move upwards when the driver's door is opened.
This occurs irrespective of the position of the
SmartKey in the ignition lock. This makes it eas-
ier to exit the vehicle and rescue the occupants.
The crash-responsive EASY-EXIT feature is only
operational if the EASY-EXIT/ENTRY feature is
activated in the on-board computer
( Y
page 240).
Mirrors
Rear-view mirror
X
Anti-glare mode: flick anti-glare lever C for-
wards or back.
Exterior mirrors
Adjusting the exterior mirrors
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. Mirrors 107
Seats, steering wheel and mirrors Z

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 1 or 2 in the
ignition lock ( Y
page 138).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

Exterior mirror pushed out of position If an exterior mirror has been pushed out of
position, proceed as follows: X
Vehicles without electrically folding exte-
rior mirrors: move the exterior mirror into
the correct position manually. X
Vehicles with electrically folding exterior
mirrors: press and hold mirror-folding but-
ton C until you hear a click and the mirror
engages in position audibly.
The mirror housing is engaged again and you
can adjust the exterior mirrors as usual
( Y
page 107).
Automatic anti-glare mirrors
G WARNING
Electrolyte may escape if the glass in an auto-
matic anti-glare mirror breaks. The electrolyte
is harmful and causes irritation. It must not
come into contact with your skin, eyes, res-
piratory organs or clothing or be swallowed.
There is a risk of injury.
If you come into contact with the electrolyte,
observe the following: R
Rinse off the electrolyte from your skin
immediately with water. R
Immediately rinse the electrolyte out of
your eyes thoroughly with clean water. R
If the electrolyte is swallowed, immediately
rinse your mouth out thoroughly. Do not
induce vomiting. R
If electrolyte comes into contact with your
skin or hair or is swallowed, seek medical
attention immediately. R
Immediately change out of clothing which
has come into contact with electrolyte. R
If an allergic reaction occurs, seek medical
attention immediately. The rear-view mirror and the exterior mirror on
the driver's side automatically go into anti-glare
mode if the following conditions are met simul-
taneously: R
the ignition is switched on and R
incident light from headlamps strikes the sen-
sor in the rear-view mirror
The mirrors do not go into anti-glare mode if
reverse gear is engaged or if the interior lighting
is switched on.
Parking position for the exterior mir-
ror on the front-passenger side
Setting and storing the parking position You can position the front-passenger side exte-
rior mirror in such a way that you can see the
rear wheel on that side as soon as you engage
reverse gear. You can store this position.
Using reverse gear
C
Button for the driver's side exterior mirror D
Button for the front-passenger side exterior
mirror

The blue W indicator lamp in the instru-
ment cluster lights up when the high-beam
headlamps are switched on. X
To switch off the high-beam head-
lamps: move the combination switch back to
its normal position.
The blue W indicator lamp in the instru-
ment cluster goes out.
Vehicles with Adaptive Highbeam Assist: if
Adaptive Highbeam Assist is activated, it auto-
matically controls activation and deactivation of
the high-beam headlamps ( Y
page 115).
Hazard warning lamps
X
To switch on the hazard warning
lamps: press button C .
All turn signals flash. If you now switch on a
turn signal using the combination switch, only
the turn signal lamp on the corresponding
side of the vehicle will flash. X
To switch off the hazard warning lamps:
press button C .
The hazard warning lamps automatically switch
on if: R
an air bag is deployed or R
the vehicle decelerates rapidly from a speed
of above 45 mph (70 km/h) and comes to a
standstill
The hazard warning lamps switch off automati-
cally if the vehicle reaches a speed of above
6 mph (10 km/h) again after a full brake appli-
cation.
i The hazard warning lamps still operate if the
ignition is switched off. Intelligent Light System
General notes The Intelligent Light System is a system that
adjusts the headlamps automatically to suit the
prevailing driving and weather conditions. It
offers advanced functions for improved illumi-
nation of the road surface, e.g. depending on the
vehicle speed or weather conditions. The sys-
tem includes the active light function, cornering
light function, highway mode and extended
range fog lamps. The system is only active when
it is dark.
You can activate or deactivate the "Intelligent
Light System" using the on-board computer
( Y
page 239).
Active light function The active light function is a system that moves
the headlamps according to the steering move-
ments of the front wheels. In this way, relevant
areas remain illuminated while driving. This
allows you to identify pedestrians, cyclists and
animals.
Active: when the lights are switched on.
Cornering light function The cornering light function improves the illu-
mination of the road over a wide angle in the
direction you are turning, enabling better visi-
bility in tight bends, for example. It can only be
activated when the low-beam headlamps are
switched on.
Active: R
if you are driving at speeds below 25 mph
(40 km/ h) and switch on the turn signal or
turn the steering wheel R
if you are driving at speeds between 25 mph
(40 km/h) and 45 mph (70 km/h) and turn
the steering wheel
The cornering lamp may remain lit for a short
time, but is automatically switched off after no
more than three minutes.
Highway mode
Highway mode increases the range of the beam.
Active: if you are driving at a speed above
110 km/h and do not make any large steering
movements for at least 1,000 m or if you are
driving at a speed above 130 km/h.114
Exterior lighting
Lights and windshield wipers

Not active: if you are driving at speeds below
80 km/h following activation.
Extended range fog lamps The extended range fog lamps reduce the glare
experienced by the driver and improve the illu-
mination of the edge of the road.
Active: if you are driving at speeds below
40 mph (70 km/h) and you switch on the rear
fog lamp.
Not active: if, following activation, you are driv-
ing at speeds above 60 mph (100 km/h) or if you
switch off the rear fog lamp
Off-road lights The off-road lights facilitate the early recogni-
tion of objects/obstacles when driving off-road
thanks to a symmetrical, wider and brighter dis-
tribution of light from the low-beam headlamps.
Active: when driving at speeds no faster than
30 mph (50 km/h) and the off-road program
selector wheel is in position 1 or 2.
Not active: when driving at speeds above
30 mph (50 km/h).
When the off-road lights are switched on, the
cornering light function is permanently activa-
ted, the active light function is deactivated and
the headlamp range control is set to static
mode.
Cornering light function The cornering light function improves the illu-
mination of the road over a wide angle in the
direction you are turning, enabling better visi-
bility in tight bends, for example. It can only be
activated when the low-beam headlamps are
switched on.
Active: R
if you are driving at speeds below 25 mph
(40 km/h) and switch on the turn signal or
turn the steering wheel R
if you are driving at speeds between 25 mph
(40 km/h) and 45 mph (70 km/h) and turn
the steering wheel
The cornering lamp may remain lit for a short
time, but is automatically switched off after no
more than three minutes. Adaptive Highbeam Assist
General notes You can use this function to set the headlamps
to change between low beam and high beam
automatically. The system recognizes vehicles
with their lights on, either approaching from the
opposite direction or traveling in front of your
vehicle, and consequently switches the head-
lamps from high beam to low beam.
The system automatically adapts the low-beam
headlamp range depending on the distance to
the other vehicle. Once the system no longer
detects any other vehicles, it reactivates the
high-beam headlamps.
The system's optical sensor is located behind
the windshield near the overhead control panel.
Important safety notes
G WARNING
Adaptive Highbeam Assist does not recognize
road users: R
who have no lights, e.g. pedestrians R
who have poor lighting, e.g. cyclists R
whose lighting is blocked, e.g. by a barrier
On very rare occasions, Adaptive Highbeam
Assist may fail to recognize other road users
that have lights, or may recognize them too
late. In this, or in similar situations, the auto-
matic high-beam headlamps will not be deac-
tivated or will be activated regardless. There is
a risk of an accident.
Always carefully observe the traffic conditions
and switch off the high-beam headlamps in
good time.
Adaptive Highbeam Assist cannot take into
account road, weather or traffic conditions.
Adaptive Highbeam Assist is only an aid. You are
responsible for adjusting the vehicle's lighting
to the prevailing light, visibility and traffic con-
ditions.
In particular, the detection of obstacles can be
impaired if: R
poor visibility, e.g. due to fog, heavy rain or
snow R
dirt on the sensors or the sensors are
obscuredExterior lighting 115
Lights and windshield wiper s Z

been switched off. The heating time depends on
the set interior temperature.
Switching on/off X
To activate: press the K or V button.
The indicator lamp in the K or V button
lights up.
i The blower will run at a low speed regardless
of the airflow setting.
i If you activate the residual heat function at
high temperatures, only the ventilation will be
activated. The blower runs at medium speed. X
To deactivate: press the K or V but-
ton.
The indicator lamp in the K or V button
goes out.
Residual heat is deactivated automatically: R
after approximately 30 minutes R
when the ignition is switched on R
if the battery voltage drops
Ionization Ionization is used to purify the air in the vehicle
interior and attain an improved interior climate.
The ionization of the interior air is odorless and
cannot be perceived directly in the vehicle inte-
rior.
You can switch ionization on and off via the mul-
timedia system (see the separate operating
instructions).
Ionization can only be operated when the auto-
matic climate control is switched on. The side air
vent on the driver's side must be open.
Setting the air vents
Important safety notes
G WARNING
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: R
keep the air inlet grille on the hood and in the
engine compartment on the front-passenger
side free of blockages, such as ice, snow or
leaves. R
never cover the air vents or air intake grilles in
the vehicle interior.
i For virtually draft-free ventilation, adjust the
sliders of the air vents to the center position.
Setting the center air vents
C
Center air vent, left D
Center air vent, right