
&
WARNING Risk of inju ryor death due to
bloc ked seat belt buckle or seat belt
anchorage
Objects next tothe front seat that block the
seat belt buckle or the moving seat belt
anchorage on the front seat impair the func‐
tion of the seat belt tensioners.
The seat belt tensioners may not function as
intended and the seat belt may no longer
pr ov ide the intended pr otection. #
Before starting the journe y,make sure
th at there are no objects around the
seat belt buckle or between the front
seat and door. &
WARNING Risk of inju ryor death due to
damaged or modified seat belts
Seat belts cann otprov ide pr otection in the
fo llowing situations:
R Ifth e seat belts are damaged, modified,
ex treme lydirty, bleached or dyed R
Ifth e seat belt buckle is damaged or
ex treme lydirty
R Ifth e seat belt tensioners, seat belt
anchorages or seat belt retractors ha ve
been modified
Seat belts may be damaged in an accident,
although the damage may not be visible, e.g.
due tosplinters of glass.
Modified or damaged seat belts may tear or
fa il, e.g. in an accident.
Modified seat belt tensioners could acciden‐
ta lly trigger or failto function as intended. #
Never modify the seat belts, seat belt
te nsioners, seat belt anchorages or seat
belt retractors. #
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 on lyuse
seat belts which ha vebeen appr oved specifically
fo ryo ur vehicle byMercedes-Benz. &
WARNING Risk of inju ryor 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. 34
Occupant saf ety

*
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 adju sting 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 the seat belt outlet into the desired
position. #
Let go of the belt outlet release and ensure
th at the seat belt outlet loc ksin position. Ve
hicles with PRE-SAFE ®
:If th e front seat belt
is not pulled tight across your body, the seat belt
adjustment may automatically apply a cer tain
tigh tening forc e. Do not hold the seat belt tightly
while it is adjusting. You can activate and deacti‐
va te the seat belt adjustment function using the
multimedia sy stem.
* NO
TEDeployment of the seat belt ten‐
sioner when the front passenger seat is
unoccupied If
th e seat belt tongue is engaged in the seat
belt buckle of the front passenger seat and
th e front passenger seat is unoccupied, the
seat belt tensioner may depl oyintheeve nt
of an accident. #
Only one pe rson should use each seat
belt at any one time. Re
leasing the seat belts #
Press there lease button in the seat belt
buckle and guide the seat belt back with the
seat belt tongue. Occupant sa
fety 35

Ac
tivating or deactivating seat belt adjust‐
ment via the multimedia sy stem Multimedia sy
stem:
, Vehicle .
î Vehicle settings .
Belt
adjustment #
Activate Oor deacti vate ª the function. Seat belt
warning for the driver and front
passen ger The
ü 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, an acoustic warning tone may sound.
As soon as the driver and front passenger fasten
th eir seat belts, the seat belt warning goes out. Re
ar seat belt status display The
rear seat belt status display is on lyavailable
fo r cer tain countries. The
rear seat belt status display informs you
which rear seat belt is not fastened.
Yo u can immediately dismiss there ar seat belt
st atus display using the back button on the left-
hand side of thesteering wheel (→ page 256). Airbags
Overview of airbags
1
Knee airbag
2 Driver's airbag
3 Front passenger airbag
4 Window airbag
5 Side impact airbag
The ins tallation location of an airbag is identified
by the AIRB AGsymbol. 36
Occupant saf ety

When activated, an airbag can pr
ovide addi‐
tional pr otection for the respective vehicle
occupant. AIRB
AG Potential pr otection for
…
Knee airbag Thigh, knee and lo wer leg
Driver's airbag,
front passenger
airbag Head and
ribcage
Wi ndow airba gHead
Side impact air‐
bag Ribcage, also pelvis
for
front seat occupants The front passenger airbag can only be depl
oyed
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 41). *
NO
TEImpo rtant points toremember if
th e 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.
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. Pr
otection bythe 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 inju ryor death due to
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 and deployment may even
cause fur ther injuries.
To avo id hazardous situations, alw ays make
sure that all vehicle occupants:
R Have their seat belt fastened cor rectly,
including pregnant women.
R Are seated properly 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 idrisks resulting from the deployment of
th e airbag:
R Before starting your journe y,adjust your seat
co rrectly ;th e driver's seat and front
passenger seat should be mo ved as far back
as possible. Occupant saf
ety37

&
WARNING Risk of inju ryor death due to
objects between the sitting sur face and
th ech ild restra int sy stem
Objects between the sitting sur face and the
ch ild restra int sy stem could af fect the func‐
tion of the automatic front passenger airbag
shutoff.
This could result in the front passenger air‐
bag not functioning as intended during an
accident. #
Do not place any objects between the
sitting sur face and thech ild restra int
sy stem. #
The entire base of thech ild restra int
sy stem must alw aysre st on the sitting
sur face of the front passenger seat. #
The backrest of thefo rw ard-facing child
re stra int sy stem must, as far as possi‐
ble, be resting on the seat backrest of
th e front passenger seat. #
Alw ays comply with thech ild restra int
sy stem manufacturer's ins tallation
instructions. A person in
the front passenger seat mus t:
R Have their seat belt fastened cor rectly.
R Sit in an almost up right seat position with
th eir back against the seat backrest.
R Sit with their feet resting on thefloor, if pos‐
sible.
Otherwise, the front passenger airbag may be
deactivated bymis take ,fo rex ample because the
front passenger:
R Trans fers their weight bysupporting them‐
selves on a vehicle armrest.
R Sits in such a wayth at their weight is raised
from the sitting sur face. &
WARNING Risk of inju ryor death due to
deactivated front passenger airbag
If th ePA SSENGER AIRB AGOFF indicator
lamp is lit, the front passenger airbag is disa‐
bled. It will not be deplo yed in theev ent of
an accident and cann otper form its intended
pr otective function. A person in
the front passenger seat could
th en, forex ample, come into con tact wi th
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 rectl y. #
Ensu re, bo thbefore and during the jour‐
ne y,that thest atus of the front
passenger airbag is cor rect. 40
Occupant saf ety

When ins
talling a child restra int sy stem on the
front passenger seat, obse rveth eve hicle-spe‐
cific information (→ page 39).
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 ins tallth ere ar wa rd-facing child restra int
sy stem on the front passenger seat.
Ins tead, ins tallth ere ar wa rd-facing child
re stra int sy stem on a suitable rear seat.
Af ter in stalling a forw ard-facing child
re stra int sy stem on the front passenger
seat: depending on thech ild restra int sy stem
and thest ature of thech ild, PASSENGER AIR
BA G OFF may be lit continuously or be off.
Alw ays obser vethefo llowing information. &
WARNING Risk of inju ryor death due to
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
and you position the front passenger seat too
close tothe cockpit, in theeve nt of an acci‐
dent, thech ild could:
R Come into con tact wi th theve 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.
Alw ays make sure that the shoulder belt
st ra p is cor rectly routed from the seat
belt outlet on theve hicle tothe shoul‐
der belt guide on thech ild restra int sys‐
te m. The shoulder belt stra p must be
ro uted forw ards and down wards from
th e seat belt outlet. If necessar y,adjust th
e seat belt outlet and the front
passenger seat accordingly. #
Alw ays obser vethech ild restra int sys‐
te m manufacturer's ins tallation instruc‐
tions. When ins
talling a child restra int sy stem on the
front passenger seat, obse rveth eve hicle-spe‐
cific information (→ page 39).
If a person is sitting in the front passenger
seat: PASSENGER AIR BAG OFF may be lit con‐
tinuously or be off, depending on the person's
st ature. Alw ays obser vethefo llowing informa‐
tion.
If th e front passenger seat is occupied by:
R An adult or a pe rson with a build 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
with a build cor responding tothat of an adult 42
Occupant saf ety

should not use
the front passenger seat.
Ins tead, they should use a rear seat.
R A person with a smaller build (e.g. a teenager
or small adult), thePA SSENGER AIR BAG OFF
indicator lamp either lights up and remains lit
depending on there sult of the classification
or, alternatively, goes out.
- PASSENGER AIRB AGOFF is off: mo vethe
front passenger seat as far back as possi‐
ble or a person with a smaller build
should use a rear seat.
- Ifth ePA SSENGER AIRB AGOFF indicator
lamp is lit continuously: a person with a
smaller build should not use the front
passenger seat. &
WARNING Risk of inju ryor 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 sy stem self-test,
th e front passenger airbag is disabled. It will
not be deplo yed in theeve nt of an accident.
In this case, the front passenger airbag can‐ not per
form its intended pr otective function,
e.g. when a person is seated in the front
passenger seat.
That person could, forex ample, come into
con tact wi th theve hicle interior, especially if
th e 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 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. Fu
rther related subjects:
R Child restra int sy stem on the front passenger
seat (→ page 50).
R Suitable positioning of thech ild restra int sys‐
te m (→ page 52). PRE-SAFE
®
sy stem Information on PRE-
SAFE®
(anticipa tory
occupant pr otection) 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: Moving
th e front passenger seat toa more favo ura‐
ble seat position.
R Vehicles with multicontour seat: Increas‐
ing the air pressure in the seat side bols ters
of the seat backrest.
R PRE-SAFE ®
Sound: Pr ovided that the multi‐
media sy stem is switched on, generates a Occupant sa
fety 43

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®
measures If an accident did not occur,
the pre-em ptive
measures that we retaken 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. Information on PRE-
SAFE®
PLUS (anticipa‐
to ry 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.
If an accident does not occur, the pre-emp‐
tive measures that we retake n are reve rsed .
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.
PRE-SAFE ®
PLUS sy stem limitations
R No me asures are implemented:
- Ifth eve hicle is reve rsing. or
- When theve hicle is towing a trailer and
th ere is a risk of a rear impact.
R The brakes are not applied:
- Whilst driving.
or
- When entering or exiting a parking space
using Parking Pilot. Information on 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
th e dis tance between the door and theve hicle
occupant.
If PRE-SAFE ®
Impulse Side has been deplo yed or
is faulty, the display message PRE-SAFE impulse44
Occupant saf ety