
Modified or damaged seat belts could
tear or
fa il in theeve nt of an accident, forex ample.
Modified seat belt tensioners could acciden‐
ta lly trigger or failto function as intended. #
Never modify the seat belt sy stem, for
ex ample the seat belt, seat belt buckle,
seat belt tensioner, seat belt anchorage
and seat belt retractor. #
Makesure that the seat belts are
undamaged, not wornand clean. #
Alw ays ha vethe seat belts checked
immediately af ter an accident at a
qu alified specialist workshop. Mercedes-Benz
recommends that you use seat
belts which ha vebeen appr ovedfo ryo ur vehicle
by Mercedes-Benz. &
WARNING Risk of injury or death from
deplo yedpy rotech nic seat belt tension‐
ers
Py rotech nic seat belt tensioners that ha ve
been deplo yed are no longer operational and are unable
toper form their intended pr otec‐
tive function. #
Therefore, ha vedeplo yedpy rotech nic
seat belt tensioners immedia tely
re placed at a qualified specialist work‐
shop. Mercedes-Benz
recommends that you ha vethe
ve hicle towe dto aqu alified specialist workshop
af te r an accident.
* NO
TEDama gecaused bytrapping the
seat belt If an unused seat belt is not fully
retracted, it
may become trapped in the door or in the
seat mechanism. #
Alw ays ensure that an unused seat belt
is fully retracted. Fa
stening and adjust ing seat belts If
th e seat belt is pulled quickly or sharpl y,the
seat belt retractor lo cks. The seat belt stra p can‐
not be pulled out any fur ther. #
Alw ays engage seat belt tongue 2ofthe
seat belt into seat belt buckle 1ofthe cor‐
re sponding seat. #
Press and hold the seat belt outlet release
and slide seat belt outlet 3into the desired
position. #
Let go of the seat belt outlet release and
ensure that seat belt outlet 3locksinto
position. Occupant saf
ety43

%
A seat belt can only pr ovide the best le vel of
pr otection if it is worncor rectl y.Obser vethe
no tes on fastening the seat belt
(/ page 41).
* NO
TEDeployment of the seat belt ten‐
sioner and side impact airbag when the
front passenger seat is unoccupied If
th e seat belt tongue is engaged in the seat
belt buckle of the unoccupied front
passenger seat, the seat belt tensioner and
th e side impact airbag may also deploy in the
ev ent of an accident along with other sys‐
te ms. #
Only one person should use each seat
belt at any one time. Seat belt adjustment function
Ve
hicles with PRE-SAFE ®
:af te r a front seat
belt has been fastened, the automatic seat belt
adjustment may apply a cer tain tigh tening forc e.
Do not hold the seat belt tightly while it is
adjusting. Yo
u can activate and deactivate the seat belt
adjustment function using the multimedia sys‐
te m (/ page44). Ac
tivating/deactivating seat belt adjustment
via the multimedia sy stem Multimedia sy
stem:
4 © 5
Settings 5
Vehicle #
Activate or deacti vate Belt adjustment. Re
leasing seat belts #
Press there lease button in the seat belt
buckle and guide the seat belt back with the
seat belt tongue. Seat belt
warning function for the driver and
front passen ger The
00E9 seat belt warning lamp in the instru‐
ment display is a reminder that all vehicle occu‐
pants must weartheir seat belts cor rectly.
In addition, a warning tone may sound. As soon as
the driver and front passenger fasten
th eir seat belts, the seat belt warning goes out. Fu
nction of there ar seat belt status display The
rear seat belt status display is on lyavailable
fo r cer tain countries. When
the ignition is switched on, there ar seat
belt status display informs youfo r a cer tain
amount of time which rear seat belt is not fas‐
te ned.
Yo u can immediately dismiss there ar seat belt
st atus display using the back button on the left-
hand side of thesteering wheel (/ page278). 44
Occupant saf ety

If a
vehicle occupant unfas tens a seat belt in the
re ar while theve hicle is motion, there ar seat
belt status display appears again.
In addition, a warning tone may sound. In this
case, there ar seat belt status display cannot be
hidden using the back button on the left-hand
side of thesteering wheel. Airbags
Overview of airbags
1
Driver's knee airbag
2 Driver's airbag
3 Front passenger airbag 4
Window airbag
5 Side airbag
The ins tallation location of an airbag is identified
by the AIRB AGsymbol.
When enabled, an airbag can pr ovide additional
pr otection forth ere spective vehicle occupant.
Pot ential pr otection pr ovided byeach airbag:
R Knee airbag: thigh, knee and lo wer leg
R Driver's airbag, front passenger airbag: head
and ribcage
R Window airbag: head
R Side airbag: ribcage and pelvis &
WARNING Risk of injury or death ifthe
co-driver airbag is enabled
If th e co-driver airbag is enabled, a child on
th e co-driver seat may be stru ck bythe co-
driver airbag during an accident.
NEVER use a rear wa rd-facing child restra int
sy stem on a seat with an ENABLED FRONT
AIRB AG; DEAT H or SERIOUS INJU RYtothe
CH ILD can occur. When
fitting a child restra int sy stem tothe front
passenger seat, obser vetheve hicle-specific
information (/ page 70). Also, alw ays obser ve
th e no tes on rear wa rd-facing or forw ard-facing
ch ild restra int sy stems on the front passenger
seat (/ page 70).
Information on automatic front passenger
airbag shutoff
The front passenger airbag can only be deplo yed
in an accident if thePA SSENGER AIR BAG OFF
indicator lamp is off. If the front passenger seat
is occupied, make sure, bo thbefore and during
th e journe y,that thest atus of the front
passenger airbag is cor rect (/ page 50).
* NO
TEDeployment of components of the
re stra int sy stem when the front
passenger seat is unoccupied In an accident,
the components of the
re stra int sy stem may deploy unnecessarily
on the front passenger side if:
R There are heavy objects on the front
passenger seat. Occupant saf
ety45

R
The seat belt tongue is engaged in the
seat belt buckle of the front passenger
seat and the front passenger seat is
unoccupied. #
Stow objects in a suitable place. #
Only one person should use each seat
belt at any one time. Depending on
the de tected accident situation,
th e window airbag on the front passenger side
may deplo y.The airbag is deplo yedre ga rdless of
whe ther the front passenger seat is occupied. Pr
otective capacity of the airbags Depending on
the accident situation, an airbag
may supplement the pr otection of fere dby a cor‐
re ctly fastened seat belt. &
WARNING Risk of injury or death dueto
an incor rect seat position
If yo u deviate from the cor rect seat position,
th e airbag cann otper form its intended pro‐
te ctive function. Each
vehicle occupant must make sure of the
fo llowing:
R Fasten seat belts cor rectl y.Pregnant
wo men must take particular care to
ensure that the lap belt ne ver lies across
th e abdomen.
R Adopt the cor rect seat position and keep
as faraw ay as possible from the airbags.
R Obser vethefo llowing information. #
Alw ays make sure that there are no
objects between the airbag and vehicle
occupant. To
avo idtherisks resulting from the deployment
of an airbag, each vehicle occupant must
obser vethefo llowing information in particular:
R Before starting your journe y,adjust your seat
co rrectly; the driver's seat and front
passenger seat should be mo ved as far back
as possible.
When doing so, alw ays obser vethe informa‐
tion on the cor rect driver's seat position
(/ page 99). R
Only hold thesteering wheel bythesteering
wheel rim. This allows the airbag tobe fully
deplo yed.
R Alw ays lean against the seat backrest when
th eve hicle is in motion. Do not lean forw ards
or against the door or side windo w.You may
ot herwise be in the deployment area of the
airbags.
R The occupants must alw ayske ep their feet
on thefloor. Do not put your feet on the
cockpit, forex ample. Your feet may other‐
wise be in the deployment area of the airbag.
R Ifch ildren are tra velling in theve hicle,
obser vethe additional no tes (/ page 55).
R Alw aysstow and secure objects cor rectly.
Objects in theve hicle interior may pr event an
airbag from functioning cor rectly. Each vehicle
occupant must alw ays make sure of thefo llow‐
ing in particular:
R There are no people, animals or objects
between theve hicle occupants and an air‐
bag. 46
Occupant saf ety

#
Alw ays comply with thech ild restra int
sy stem manufacturer's ins tallation
instructions. A person on
the front passenger seat must
obser vethefo llowing information:
R Fasten seat belts cor rectly (/ page 41).
R Sit in an almost upright seat position with
their back against the seat backrest.
R Sit with their feet resting on thefloor, if pos‐
sible.
The front passenger airbag may otherwise be
disabled bymis take ,fo rex ample, in thefo llow‐
ing situations:
R The front passen ger transfers their weight by
supporting themselves on a vehicle armrest.
R The front passenger sits in such a wayth at
th eir weight is raised from the sitting sur‐
fa ce. &
WARNING Risk of injury or death dueto
a disabled front passenger airbag
The front passenger airbag is disabled when
th ePA SSENGER AIR BAG OFF indicator lamp
is lit.
A person in the front passenger seat could
th en, forex ample, come into con tact with
th eve hicle interior, especially if the person is
sitting too close tothe cockpit.
If th e front passenger seat is occupied,
alw ays ensure that:
R the classification of the person in the
front passenger seat is cor rect and the
front passenger airbag is enabled or disa‐
bled in accordance with the person in the
front passenger seat.
R the front passenger seat has been mo ved
as far back as possible.
R the person is seated cor rectly. #
Both before and during the journe y,
ensure that thest atus of the front
passenger airbag is cor rect. If
th e front passenger seat is occupied, the clas‐
sification of the person or child restra int sy stem
on the front passenger seat take s place af terthe
front passenger airbag shutoff self-test. The
PA SSENGER AIR BAG indicator lamps displ aythe
st atus of the front passenger airbag.
Alw ays obser vethe no tes on the function of the
PA SSENGER AIR BAG indicator lamps
(/ page 50). Occupant saf
ety49

Alw
ays ensure that the front passenger air‐
bag is disabled. The PASSENGER AIR BAG
OFF indicator lamp must be lit.
NEVER use a rear wa rd-facing child restra int
sy stem on a seat with an ENABLED FRONT
AIRB AG. This can result in the DEAT H of or
SERIOUS INJU RYtotheCH ILD. When
fitting a child restra int sy stem tothe front
passenger seat, obser vetheve hicle-specific
information (/ page 70).
Depending on thech ild restra int sy stem and the
st ature of thech ild, thePA SSENGER AIR BAG
OFF indicator lamp may be off. In this case, do
not fit th ere ar wa rd-facing child restra int sy stem
to the front passenger seat.
Ins tead, fit th ere ar wa rd-facing child restra int
sy stem toa suitable rear seat.
Af terfitting a forw ard-facing child restra int
sy stem tothe front passenger seat: depend‐
ing on thech ild restra int sy stem and thest ature
of thech ild, PASSENGER AIR BAG OFF may be lit
continuously or be off. Alw ays obser vethefo l‐
lowing information. &
WARNING Risk of injury or death dueto
incor rect positioning of thefo rw ard-
fa cing child restra int sy stem
If yo u secure a child in a forw ard-facing child
re stra int sy stem on the front passenger seat
th at is positioned too close tothe cockpit, in
th eev ent of an accident, thech ild could:
R come into con tact with th eve hicle inte‐
ri or if thePA SSENGER AIR BAG OFF indi‐
cator lamp is lit, forex ample
R bestru ck bythe airbag if thePA SSENGER
AIR BAG OFF indicator lamp is off. #
Alw ays mo vethe front passenger seat
as far back as possible and fully retract
th e seat cushion length adjustment.
While doing so, alw ays make sure that
th e shoulder belt stra p is cor rectly
ro uted from the seat belt outlet of the
ve hicle tothe shoulder belt guide on
th ech ild restra int sy stem. The shoulder
belt stra p must be routed forw ards and
down wards from the seat belt outlet. If
necessar y,adjust the seat belt outlet and
the front passenger seat accord‐
ingly. #
Alw ays comply with thech ild restra int
sy stem manufacturer's ins tallation
instructions. When
fitting a child restra int sy stem tothe front
passenger seat, obser vetheve hicle-specific
information (/ page 70).
If a person is sitting on the front passenger
seat: PASSENGER AIR BAG OFF may be lit con‐
tinuously or be off, depending on the person's
st ature.
A person on the front passenger seat must
alw ays obser vethefo llowing information:
R Ifth e front passenger seat is occupied byan
adult or a person with a stature cor respond‐
ing tothat of an adult, thePA SSENGER AIR
BA G OFF indicator lamp must be off. This
indicates that the front passenger airbag is
enabled.
If th ePA SSENGER AIR BAG OFF indicator
lamp is lit continuousl y,an adult or person Occupant saf
ety51

with a build cor
responding tothat of an adult
must not use the front passenger seat.
Ins tead, they should use a rear seat.
R Ifth e front passenger seat is occupied by a
person of smaller stature (e.g. a teenager or
small adult), thePA SSENGER AIR BAG OFF
indicator lamp is either lit continuously or
re mains off, depending on the classification.
- Ifth ePA SSENGER AIR BAG OFF indicator
lamp is off: mo vethe front passenger
seat as far back as possible, or the per‐
son of smaller stature should use a rear
seat.
- Ifth ePA SSENGER AIR BAG OFF indicator
lamp is lit continuously: the person of
smaller stature should not use the front
passenger seat. &
WARNING Risk of injury or death when
th ePA SSENGER AIR BAG OFF indicator
lamp is lit
If th ePA SSENGER AIR BAG OFF indicator
lamp remains lit af terth e self-test, the front
passenger airbag is disabled. If
th e front passenger seat is occupied,
alw ays ensure that:
R The classification of the person in the
front passenger seat is cor rect and the
front passenger airbag is enabled or disa‐
bled in accordance with the person in the
front passenger seat.
R The person is sea ted properly with a cor‐
re ctly fastened seat belt.
R The front passenger seat has been mo ved
as far back as possible. Be sure
toalso obse rveth efo llowing fur ther
re lated subjects:
R Child restra int sy stem on the front passenger
seat (/ page 70)
R Suitable positioning of thech ild restra int sys‐
te m (/ page 59) PRE-SAFE
®
sy stem PRE-
SAFE®
(anticipa tory occupant pr otec‐
tion) PRE-
SAFE®
is able todetect cer tain critical driv‐
ing situations and implement pre-em ptive meas‐
ures toprotect theve hicle occupants.
PRE-SAFE ®
can implement thefo llowing meas‐
ures independently of each other:
R Tightening the seat belts on the driver's seat
and front passenger seat.
R Closing the side windo ws.
R Vehicles with sliding sunroof: closethe
sliding sunroof.
R Vehicles with memory function: movethe
front passenger seat toa more favo urable
seat position.
R Vehicles with multicontour seat: increase
th e air pressure in the seat side bols ters of
th e seat backrest.
R PRE-SAFE ®
Sound: pr ovided that the multi‐
media sy stem is switched on, generates a 52
Occupant safe ty

brief noise signal
tostimulate the innate pro‐
te ctive mechanism of a person's hea ring.
* NO
TEDama gecaused byobjects in the
fo ot we ll or behind the seat The automatic adjustment of
the seat posi‐
tion may result in damage tothe seat and/or
th e object. #
Stow objects in a suitable place. Re
versing the PRE- SAFE®
sy stem measures If an accident did not occur,
the pre-em ptive
measures that we retak en are reve rsed.
Yo u will need toper form certain settings your‐
self. #
Ifth e seat belt pre-tensioning is not reduced,
mo vethe seat backrest back slightl y.
The locking mechanism releases. Fu
nction of PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus) PRE-
SAFE®
PLUS can de tect cer tain impacts,
particular lyan imminent rear impact, and take
pre-em ptive measures toprotect theve hicle
occupants. These measures cannot necessarily
pr eve nt an imminent impact.
PRE-SAFE ®
PLUS can implement thefo llowing
measures independently of each other:
R Tightening the seat belts on the driver's seat
and front passenger seat.
R Activating there ar hazard warning lights at a
higher flashing frequenc y.
R Increasing brake pressure when theve hicle
is stationar y.This brake application is cancel‐
led automatically when theve hicle pulls
aw ay.
If an accident did not occur, the pre-em ptive
measures that we retake n are reve rsed. Sy
stem limits
The sy stem will not initiate any action in thefo l‐
lowing situations:
R when reve rsing
or
R when theve hicle is towing a trailer and there
is a risk of a rear impact
The sy stem will not initiate any braking applica‐
tion in thefo llowing situations:
R whilst driving
or
R when entering or exiting a parking space
while using Active Parking Assist Fu
nction of PRE-SAFE ®
Impulse Side If an imminent side impact is de
tected, PRE-
SA FE®
Impulse Side can pre-emptively mo vethe
front seat vehicle occupant's upper body
to wa rdsth e cent reoftheve hicle. It does this by
ra pidly inflating an air cushion in the outer seat
side bols ter of the seat backrest on the side on
which the impact is anticipated. This increases Occupant saf
ety53