MERCEDES-BENZ GLC 2017 Service Manual

Center console, lower section (except Mercedes-AMG vehicles)
Function Page
C
Stowage compartment 278
Ashtray 292
Cigarette lighter 292
Socket 293
Cup holder 290
D
Adjusts the volume 269
Switches the sound on or off 269

Center console, lower section (Mercedes-AMG vehicles)
Function Page
C
Stowage compartment 278
Ashtray 292
Cigarette lighter 292
Socket 293
Cup holder 290
D
Adjusts the volume 269
Switches the sound on or off 269

Overhead control panel
Function Page
C
= Switches the left-hand
reading lamp on/off
115
D
3 Switches the automatic
interior lighting control
on/off 115

Door contro l panel
Function Page
C

Panic alarm X
To arm: press and hold the 3 button C
for approximately one second.
A visual and audible alarm is triggered if the
alarm system is armed. X
To disarm: press the 3 button C again.
or X
Insert the SmartKey into the ignition lock.
or X
Press the Start/Stop button.
The SmartKey must be in the vehicle.
Occupant safety
Introduction to the restraint system The restraint system can reduce the risk of vehi-
cle occupants coming into contact with parts of
the vehicle's interior in the event of an accident.
The restraint system can also reduce the forces
to which vehicle occupants are subjected during
an accident.
The restraint system comprises: R
seat belt system R
air bags R
child restraint system R
child seat securing systems
The components of the restraint system work in
conjunction with each other. They can only
deploy their protective function if, at all times, all
vehicle occupants: R
have fastened their seat belts correctly
( Y
page 46) R
have adjusted their seat and head restraint
properly ( Y
page 98). As the driver, you also have to make sure that
the steering wheel is adjusted correctly.
Observe the information relating to the correct
driver's seat position ( Y
page 98).
You also have to make sure that an air bag can
inflate properly if deployed ( Y
page 48).
An air bag supplements a correctly worn seat
belt. As an additional safety device, the air bag
increases the level of protection for vehicle
occupants in the event of an accident. For exam-
ple, if, in the event of an accident, the protection
offered by the seat belt is sufficient, the air bags
are not deployed. When an accident occurs, only
the air bags that increase protection in that par-
ticular accident situation are deployed. How-
ever, seat belts and air bags generally do not
protect against objects penetrating the vehicle
from the outside.
Information on restraint system operation can
be found under "Triggering of the Emergency
Tensioning Devices and air bags" ( Y
page 55).
For information on children traveling with you in
the vehicle and on child restraint systems, see
"Children in the vehicle" ( Y
page 59).
Important safety notes
G WARNING
Modifications to the restraint system may
cause it to no longer work as intended. The
restraint system may then not perform its
intended protective function and may fail in an
accident or trigger unexpectedly, for example.
This poses an increased risk of injury or even
fatal injury.
Never modify parts of the restraint system.
Never tamper with the wiring, the electronic
components or their software.
If it is necessary to modify components of the
restraint system to accommodate a person
with disabilities, contact an authorized
Mercedes-Benz Center for details. USA only:
for further information contact our Customer
Assistance Center at 1-800-FOR-MERCedes
(1 ‑ 800 ‑ 367 ‑ 6372).
Mercedes-Benz recommends that you only use
driving aids which have been approved specifi-
cally for your vehicle by Mercedes-Benz.Occupant safety 43
Safety Z

Restraint system warning lamp The functions of the restraint system are
checked after the ignition is switched on and at
regular intervals while the engine is running.
Therefore, malfunctions can be detected in
good time.
The u restraint system warning lamp in the
instrument cluster lights up when the ignition is
switched on. It goes out no later than a few sec-
onds after the vehicle is started. The compo-
nents of the restraint system are in operational
readiness.
A malfunction has occurred if the u restraint
system warning lamp: R
does not light up after the ignition is switched
on R
does not go out after a few seconds with the
engine running R
lights up again while the engine is running
G WARNING
If the restraint system is malfunctioning,
restraint system components may be trig-
gered unintentionally or may not deploy as
intended during an accident. This can affect
for example the Emergency Tensioning
Device or the air bag. This poses an increased
risk of injury or even fatal injury.
Have the restraint system checked and
repaired in a qualified specialist workshop as
soon as possible.
PASSENGER AIR BAG indicator lamp
PASSENGER AIR BAG ON indicator lamp C and
PASSENGER AIR BAG OFF indicator lamp D are
part of the Occupant Classification System
(OCS). The indicator lamps display the status of the
front-passenger front air bag. R
PASSENGER AIR BAG ON lights up for 60 sec-
onds, subsequently both indicator lamps are
off (PASSENGER AIR BAG ON and OFF): the
front-passenger front air bag is able to deploy
in the event of an accident. R
PASSENGER AIR BAG OFF lights up: the front-
passenger front air bag is deactivated. It will
then not be deployed in the event of an acci-
dent.
If the PASSENGER AIR BAG ON indicator lamp is
off, only the PASSENGER AIR BAG OFF indicator
lamp shows the status of the front-passenger
front air bag. The PASSENGER AIR BAG OFF
indicator lamp may be lit continuously or be off.
Depending on the person in the front-passenger
seat, the front-passenger front air bag must
either be deactivated or enabled; see the fol-
lowing points. You must make sure of this both
before and during a journey. R
Children in a child restraint system:
whether the front-passenger front air bag is
enabled or deactivated depends on the instal-
led child restraint system, and the age and
size of the child. Therefore, be sure to observe
the notes on the "Occupant Classification
System (OCS)" ( Y
page 51) and on "Chil-
dren in the vehicle" ( Y
page 59). There you
w ill also find instructions on rearward and
forward-facing child restraint systems on the
front-passenger seat. R
All other persons: depending on the classi-
fication of the person in the front-passenger
seat, the front-passenger front air bag is ena-
bled or deactivated ( Y
page 51). Be sure to
observe the notes on "Seat
belts“ ( Y
page 44) and "Air bags"
( Y
page 48). There you can also find infor-
mation on the correct seat position.
Seat belts
Introduction
Seat belts are the most effective means of
restricting the movement of vehicle occupants
in the event of an accident or the vehicle rolling
over. This reduces the risk of vehicle occupants
coming into contact with parts of the vehicle
interior or being ejected from the vehicle. Fur-
thermore, the seat belt helps to keep the vehicle44
Occupant safety
Safety

occupant in the best position in relation to the
air bag.
The seat belt system comprises: R
Seat belts R
Emergency Tensioning Devices for the front
seat belts and the outer seat belts in the rear R
Seat belt force limiters for the front seat belts
and the outer seat belts in the rear
If the seat belt is pulled out of the belt outlet
quickly or with a jerky movement, the belt
retractor locks. The belt strap cannot be extrac-
ted any further.
The Emergency Tensioning Device tightens the
seat belt in an accident, pulling the belt close
against the body. However it does not pull the
vehicle occupant back in the direction of the
backrest.
The Emergency Tensioning Device does not cor-
rect an incorrect seat position or the routing of
an incorrectly fastened seat belt.
When triggered, a seat belt force limiter helps to
reduce the force exerted by the seat belt on the
vehicle occupant.
The seat belt force limiters for the front seats are
synchronized with the front air bags, which
absorb part of the deceleration force. This can
reduce the force exerted on the vehicle occu-
pants during an accident.
! If the front-passenger seat is unoccupied,
do not insert the belt tongue into the buckle of
the front-passenger seat. This may otherwise
lead to the triggering of the Emergency Ten-
sioning Device in the event of an accident,
which will then need to be replaced.
Important safety notes The use of seat belts and child restraint systems
is required by law in: R
all 50 states R
the U.S. territories R
the District of Columbia R
all Canadian provinces
Even where this is not required by law, all vehicle
occupants should correctly fasten their seat
belts before starting the journey.
G WARNING
If the seat belt is not worn correctly, it cannot
perform its intended protective function. An
incorrectly fastened seat belt can also cause injuries, for example, in the event of an acci-
dent or when braking or changing direction
abruptly. This poses an increased risk of injury
or even fatal injury.
Always ensure that all vehicle occupants have
their seat belts fastened correctly and are sit-
ting properly.
G WARNING
The seat belt does not offer the intended level
of protection if you have not moved the back-
rest to an almost vertical position. When brak-
ing or in the event of an accident, you could
slide underneath the seat belt and sustain
abdomen or neck injuries, for example. This
poses an increased risk of injury or even fatal
injury.
Adjust the seat properly before beginning
your journey. Always ensure that the backrest
is in an almost vertical position and that the
shoulder section of your seat belt is routed
across the center of your shoulder.
G WARNING
Persons less than 5 ft (1.50 m) tall cannot
wear the seat belt correctly without an addi-
tional and suitable restraint system. If the
seat belt is not worn correctly, it cannot per-
form its intended protective function. An
incorrectly fastened seat belt can also cause
injuries, for example, in the event of an acci-
dent or when braking or changing direction
abruptly. This poses an increased risk of injury
or even fatal injury.
For this reason, always secure persons under
5 ft (1.50 m) tall in suitable additional restraint
systems.
If a child younger than twelve years old and
under 5 ft (1.50 m) in height is traveling in the
vehicle: R
always secure the child in a child restraint
system suitable for this Mercedes-Benz vehi-
cle. The child restraint system must be appro-
priate to the age, weight and size of the child R
always observe the instructions and safety
notes on "Children in the vehicle"
( Y
page 59) in addition to the child restraintOccupant safety 45
Safety Z

system manufacturer's installation and oper-
ating instructions R
always observe the instructions and safety
notes on the "Occupant classification system
(OCS)" ( Y
page 51)
G WARNING
The seat belts may not perform their intended
protective function if: R
they are damaged, modified, extremely
dirty, bleached or dyed R
the seat belt buckle is damaged or
extremely dirty R
the Emergency Tensioning Devices, belt
anchorages or inertia reels have been modi-
fied.
Seat belts may be damaged in an accident,
although the damage may not be visible, e.g.
due to splinters of glass. Modified or damaged
seat belts may tear or fail, e.g. in an accident.
Modified Emergency Tensioning Devices
could accidentally trigger or fail to deploy
when necessary. This poses an increased risk
of injury or even fatal injury.
Never modify the seat belts, Emergency Ten-
sioning Devices, belt anchorages and inertia
reels. Make sure that the seat belts are
undamaged, not worn out and clean. Follow-
ing an accident, have the seat belts checked
immediately at a qualified specialist work-
shop.
Only use seat belts that have been approved for
your vehicle by Mercedes-Benz.
AMG Performance seat: this seat is designed
for the standard three-point seat belt. If you
install another multi-point seat belt, e.g. sport or
racing seat belts, the restraint system cannot
provide the best level of protection.
G WARNING
If you feed seat belts through the opening in
the seat backrest, the seat backrest may be
damaged or may even break in the event of an
accident. This poses an increased risk of
injury or even fatal injury.
Only use the standard three-point seat belt.
Never modify the seat belt system. Proper use of the seat belts Observe the safety notes on the seat belt
( Y
page 45).
All vehicle occupants must be wearing the seat
belt correctly before beginning the journey. Also
make sure that all vehicle occupants are always
wearing the seat belt correctly while the vehicle
is in motion.
When fastening the seat belt, always make sure
that: R
the seat belt tongue is only inserted to the belt
buckle belonging to that seat. R
the seat belt is tight across your body.
Avoid wearing bulky clothing, e.g. a winter
coat. R
the seat belt is not twisted.
Only then can the forces which occur be dis-
tributed over the area of the belt. R
the shoulder section of the belt is always
routed across the center of your shoulder.
The shoulder section of the belt must not
come into contact with your neck or be routed
under your arm. Where possible, adjust the
seat belt to the appropriate height. R
the lap belt passes tightly and as low down as
possible across your lap.
The lap belt must always be routed across
your hip joints and not across your abdomen.
This applies particularly to pregnant women.
If necessary, push the lap belt down to your
hip joint and pull it tight using the shoulder
section of the belt. R
the seat belt is not routed across sharp, poin-
ted or fragile objects.
If you have such items located on or in your
clothing, e.g. pens, keys or eyeglasses, store
these in a suitable place. R
only one person is using a seat belt at a time.
Infants and children must never travel sitting
on the lap of a vehicle occupant. In the event
of an accident, they could be crushed
between the vehicle occupant and seat belt. R
objects are never secured with a seat belt if
the seat belt is also being used by one of the
vehicle's occupants.
Also ensure that there are never objects
between a person and the seat, e.g. cushions.
Seat belts are only intended to secure and
restrain vehicle occupants. Always observe the
"Loading guidelines" for securing objects, lug-
gage or loads ( Y
page 278).46
Occupant safety
Safety

Fastening and adjusting the seat belts Observ e th e safet y note s on th e seat belt
( Y
page 45) and th e note s on correct use of seat
belt s ( Y
page 46) .
If th e cente r rear seat belt is bein g used, also
observ e th e information about th e seat belt for
th e cente r rear seat ( Y
page 47).
Basic illustration X
Adjus t th e seat ( Y
page 98).
The seat backrest must be in an almost
upright position .X
Pull th e seat belt smoothly from th e belt outlet
and engage belt tongue D int o belt
buckle C .
The seat belt on th e driver’s seat and th e
front-passenger seat may be tightened auto -
matically, see "Belt adjustment"
( Y
page 47). X
If necessary, pull up on th e shoulder section
of th e seat belt to tighten th e belt across your
body.
The shoulder section of th e seat belt must
always be routed across th e cente r of th e shoul-
der . Adjus t th e belt outlet if necessary.X
To raise: slide th e belt outlet up.
The belt outlet will engage in various posi-
tions. X
To lower : hold belt outlet release

Regardles s of whether th e driver' s seat belt has
already been fastened, th e v seat belt warn -
ing lamp lights up for six seconds eac h time th e
engin e is started. If , after six seconds, th e driver
or front-passenger seat belt has no t been fas -
tene d and th e door s are closed, th e v seat
belt warning lamp lights up. As soo n as th e driv -
er' s and front-passenger seat belt s are fastene d
or a fron t door is opened again , th e v seat
belt warning lamp goes out .
If th e driver' s seat belt is no t fastene d after th e
engin e is started, an additional warning tone will
sound. The warning tone switches off after six
seconds or once th e driver' s seat belt is fas -
tened.
If th e vehicle's spee d exceeds 15 mph
(25 km/h) once and th e driver' s and front-
passenger seat belt s are no t fastened, a warning
tone sounds. A warning tone also sounds wit h
increasing intensit y for 60 seconds or until th e
driver or fron t passenger hav e fastene d their
seat belts.
If th e driver or fron t passenger unfasten their
seat belt s during th e journey, th e seat belt warn -
ing is activated again .
Air bags
Introduction The installation poin t of an air bag can be rec -
ognized by th e AI R BA G symbol.
An air bag complements th e correctl y fastene d
seat belt . It is no substitut e for th e seat belt . The
air bag provide s additional protection in appli-
cable acciden t situations.
Not all air bags are deployed in an accident. The
differen t air bag systems function independ-
entl y from on e another ( Y
page 55).
However, no system available today can com-
pletely eliminate injurie s and fatalities.
It is also no t possibl e to rule out a ris k of injury
caused by an air bag due to th e high spee d at
whic h th e air bag mus t be deployed.
Important safety notes
G WARNIN G
If you do no t sit in th e correc t seat position ,
th e air bag canno t protect as intended and
could eve n caus e additional injury when deployed. This poses an increased ris k of
injury or eve n fatal injury.
To avoi d hazardous situations, always mak e
sur e that all of th e vehicle's occupants: R
hav e fastene d their seat belt s correctly,
includin g pregnant women R
are sitting correctl y and maintai n th e great-
est possibl e distanc e to th e air bagsR
follow th e followin g instruction s
Always mak e sur e that there are no objects
between th e air bag and th e vehicle's occu-
pants . R
Adjus t th e seat s properly before beginning
your journey. Always mak e sur e that th e seat
is in an almost upright position . The center of
th e head restrain t mus t support th e head at
about eye level. R
Mov e th e driver' s and front-passenger seat s
as far bac k as possible. The driver' s seat posi-
tion mus t allow th e vehicl e to be driven safely.R
Only hold th e steering whee l on th e outside .
This allows th e air bag to be fully deployed. R
Always lean against th e backrest while driv -
ing . Do no t lean forwards or lean against th e
door or side window. You may otherwise be in
th e deploymen t area of th e air bags .R
Always keep your fee t in th e footwell in fron t
of th e seat . Do no t put your fee t on th e dash -
board, for example. Your fee t may otherwise
be in th e deploymen t area of th e a ir bag.R
Fo r this reason , always secure person s less
than 5 ft (1.5 0 m) tall in suitable restraint sys-
tems. Up to this height, the seat belt cannot
be worn correctly.
If a child is traveling in your vehicle, also
observe the following notes: R
Always secure children under twelve years of
age and less than 5 ft (1.50 m) tall in suitable
child restraint systems. R
Child restraint systems should be installed on
the rear seats. R
Only secure a child in a rearward-facing child
restraint system on the front-passenger seat
when the front-passenger front air bag is
deactivated. If the PASSENGER AIR BAG OFF
indicator lamp is permanently lit, the front-48
Occupant safety
Safety