
Re
stra int sy stem functionality When
the ignition is switched on, a sy stem self-
te st is per form ed, during which the6
re stra int sy stem warning lamp lights up. It goes
out no later than a few seconds af terth eve hicle
is star ted. The components of there stra int sys‐
te m are then functional. Re
stra int sy stem malfunction R
The 6 restra int sy stem warning lamp
does not light up when the ignition is
switched on.
R The 6 restra int sy stem warning lamp
lights up continuously or repeatedly during a
journe y. &
WARNING Risk of inju ryor fata l injury
due toa malfunction in there stra int sys‐
tem
If th ere stra int sy stem is malfunctioning,
re stra int sy stem components may be trig‐
ge red unintentionally or might not be trig‐
ge red at all in theev ent of an accident. This may af
fect the seat belt tensioner or airbag,
fo rex ample. #
Have there stra int sy stem checked and
re paired immediately at a qualified spe‐
cialist workshop. Fu
nction of there stra int sy stem in an acci‐
dent How
there stra int sy stem works is de term ined by
th e se verity of the impact de tected and the type
of accident anticipated:
R Frontal impact
R Rear impact
R Side impact
R Rollover
The activation thre sholds forth e components of
th ere stra int sy stem are de term ined based on
th eev aluation of the sensor values measured at
va rious points in theve hicle. This process is pre-
em ptive in nature. The triggering/deployment of
th e components of there stra int sy stem should ta
ke place in good time at thest art of the colli‐
sion.
Fa ctors whi chcan only be seen and measu red
af te r a collision has occur red cann otplay a deci‐
sive role in airbag deployment, nor do they pro‐
vide an indication of airbag deployment.
The vehicle may be deformed significantly with‐
out an airbag being deplo yed. This is the case if
only parts which are relatively easily deformed
are af fected and thera te ofvehicle deceleration
is not high. Con versely, an airbag may be
deplo yedev en though theve hicle suf fers only
minor deformation. If very rigid vehicle parts
such as longitudinal members are hit, forex am‐
ple, theve hicle deceleration may be high enough
fo rth is to happen. 26
Occupant saf ety

PA
SSENGER AIR BAG indicator lamps
Sy stem self- test When
the ignition is switched on, a sy stem self-
te st is per form ed during which the two
PA SSENGER AIR BAG ON and OFF indicator
lamps light up simultaneousl y.The
status of the front passenger airbag is then
displa yed:
R PASSENGER AIR BAG ON lights up for
60 seconds, subsequently bo thindicator
lamps are off (PASSENGER AIR BAG ON and
OFF): the front passenger airbag is able to
deploy in theeve nt of an accident.
R PASSENGER AIR BAG OFF lights up continu‐
ously: the front passenger airbag is disabled.
It will then not be deplo yed in theev ent of an
accident.
If th ePA SSENGER AIR BAG ON indicator lamp is
off, on lythePA SSENGER AIR BAG OFF indicator
lamp sho wsthest atus of the front passenger
airbag. The PASSENGER AIR BAG OFF indicator
lamp may be lit continuously or be off.
If th ePA SSENGER AIR BAG OFF indicator lamp
and the6 restra int sy stem warning lamp
light up simultaneousl y,the front passenger seat
may not be used. Also in this case, do not ins tall
a ch ild restra int sy stem on the front passenger
seat. Ha vethe automatic front passenger airbag
shutoff checked and repaired immediately at a
qu alified specialist workshop. St
atus display
If th e front passenger seat is occupied, ensure,
bo th before and during the journe y,that thest a‐
tus of the front passenger airbag is cor rect for
th e pr evailing situation.
Af ter in stalling a rear wa rd-facing child
re stra int sy stem on the front passenger
seat: PASSENGER AIR BAG OFF must be lit con‐
tinuousl y. &
WARNING Risk of inju ryor death from
using a rear wa rd-facing child restra int
sy stem when the front passenger airbag
is enabled
If yo u secure a child in a rear wa rd-facing
ch ild restra int sy stem on the front passenger
seat and thePA SSENGER AIR BAG OFF indi‐
cator lamp is off, the front passenger airbag
can deploy in theeve nt of an accident.
The child could be stru ck bythe airbag.
Alw ays ensure that the front passenger air‐
bag is disabled. The PASSENGER AIR BAG
OFF indicator lamp must be lit. Occupant saf
ety37

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 continuously
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 (→ page47).
R Suitable positioning of thech ild restra int sys‐
te m (→ page 49). Ro
ll bar &
DANG ER Risk of injury or death caused
by a malfunction of thero ll bars
If th e function of thero ll bars is defective,
th ey may not extend in an accident forex am‐
ple.
Consequent ly,th ero ll bars cannot pr otect
ve hicle occupants as they are designed to
do. #
Have thero ll bars checked immediately
at a qualified specialist workshop. &
WARNING Risk of inju rywhen thero ll
bars are triggered
If th ero ll bars are triggered, there is a risk of
injur y.
Alw ays make sure that there is no thing in the
sweep behind there ar head restra ints. Occupant saf
ety39

Re
versing the PRE- SAFE®
sy stem 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.
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.
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. Children in
theve hicle Note
s onthe safe transportation of children &
WARNING Risk of accident and inju ry
due tochildren left unat tended in the
ve hicle
If yo u lea vechildren unat tended in theve hi‐
cle, they may be able toset theve hicle in
motion, forex ample by:
R Releasing the parking brake.
R Shifting the transmission out of park
position j.
R Starting the engine.
In addition, they may operate vehicle equip‐
ment. #
Never lea vechildren and animals unat‐
te nded in theve hicle. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle.
This also applies tomobile phones if the
"Digital Car Key in the smartphone" Occupant saf
ety41

function is activated via
the Mercedes
me connect web app. &
WARNING This poses an increased risk
of death due toheat strokeorexposure
to cold in theve hicle
If persons – particularly children – experi‐
ence prolonged exposure toextremely high
or low temp eratures, this poses a risk of
injury or evenfa ta l injur y. #
Never lea veanyone – pa rticularly chil‐
dren – unat tended in theve hicle. &
WARNING Risk of bu rns when thech ild
seat is exposed todirect sunlight
If th ech ild restra int sy stem is exposed to
direct sunlight or heat, parts could heat up.
Children could suf fer burns on these parts,
particularly on me tallic parts of thech ild
re stra int sy stem. #
Alw ays make sure that thech ild
re stra int sy stem is not exposed to
direct sunlight. #
Protect it with a blank et,fo rex ample. #
Ifth ech ild restra int sy stem has been
ex posed todirect sunlight, allow it to
cool before secu ring a child into it. #
Never lea vechildren unat tended in the
ve hicle. To
impr oveprotection forch ildren younger than
12 years old and under 1.50 m in height,
Mercedes-Benz recommends you obse rvethe
fo llowing no tes:
R Only secure children using a child restra int
sy stem which is suitable and recommended
fo r Mercedes-Benz vehicles, as well as appro‐
priate tothe height, age and weight of the
ch ild. Be sure toobser vethe instructions for
cor rect use of thech ild restra int sy stem.
R Alw ays ins tall a child restra int sy stem on a
re ar seat if possible.
R Onlyuse thefo llowing securing sy stems for
ch ild restra int sy stems: -
the seat belt sy stem
- the ISOFIX or i-Size mounting brac kets
- theTo pTe ther anchorages
R The manufacturer's ins tallation instructions
fo rth ech ild restra int sy stem.
R The warning labels in theve hicle interior and
on thech ild restra int sy stem. &
WARNING Risk of inju ryor death caused
by incor rect ins tallation of thech ild
re stra int sy stem
If th ech ild restra int sy stem is incor rectly
ins talled on a suitable seating position, it
cannot per form its intended pr otective func‐
tion.
The child cannot be restra ined in theeve nt of
an accident, heavy braking or a sudden
ch ange of direction. #
Alw ays comply with the manufacturer's
ins tallation instructions forth ech ild
re stra int sy stem and its cor rect use. 42
Occupant saf ety

Semi-uni
versal ch ild restra int sy stems are indi‐
cated bythete xt "semi-uni versal" on the
appr oval label. They can on ly beused if theve hi‐
cle and the seat are lis ted in thech ild restra int
sy stem manufacturer's vehicle model list.
Suitability of seats for attaching belt-
secu redch ild restra int sy stems
Obser vethefo llowing information:
R When using a baby car seat of the cate‐
gory 0/0+ and a rear wa rd-facing child
re stra int sy stem on a rear seat: adjustthe
driver's and front passenger seat such that
th e seat does not touch thech ild restra int
sy stem.
R When using a forw ard-facing child
re stra int sy stem of category I: remo vethe
head restra int from there spective seat, if
possible (→ page 93). In addition, the seat
backrest of thech ild restra int sy stem must,
as far as possible, lie flat against the back‐
re st of theve hicle seat. R
When youre mo vethech ild restra int sy stem,
fi t th e head restra int immediately
(→ page 93) and adjust all the head
re stra ints again cor rectly.
R For cer tain child restra int sy stems in weight
categories II or III, there might be restrictions
in the maximum size setting, e.g. due topos‐
sible con tact wi th thero of.
R Make sure that thech ild's feet do not touch
th e front seat. If necessar y,mo vethe front
seat forw ard slightl y.
R The child restra int sy stem must not touch the
ro of or be put under stra in by the head
re stra ints. Adjust the head restra ints accord‐
ing ly.
R When opening or closing the soft top, the
ch ild restra int sy stems in weight categories II
or III must be remo ved or the head restra ints
of thech ild restra int sy stems must be mo ved
to the lo westposition. R
Obser vethe manufacturer's ins tallation
instructions forth ech ild restra int sy stem.
Legend for the table:
X Not suitable forch ildren in this we ight
categor y.
U Suitable forch ild restra int sy stems of
th e "Universal" category in this we ight
categor y.
UF Suitable forfo rw ard-facing child
re stra int sy stems of the "Universal" cat‐
egory in this we ight categor y.
L Suitable for semi-universal child
re stra int sy stems according totheta ble
in "Recommended child restra int sys‐
te ms", or if theve hicle and the seat are
lis ted in thech ild restra int sy stem man‐
ufacturer's vehicle model list. 50
Occupant saf ety

We
ight categories
Front passenger airbag enabled 1
Front passenger airbag disa‐
bled 1, 2 Re
ar seat left, right
Category 0: upto10 kg XU ,LU , L
Category 0+: upto13 kg XU ,LU , L
Category I: 9to 18 kg UF,LU ,LU , L
Category II: 15to25 kg UF,LU ,LU , L
Category III: 22to36 kg UF,LU ,LU , L
1 Ad just the seat cushion inclination tothe highest/s teepest position and set the seat backrest toan upright position.
2 The vehicle is equipped with an automatic front passenger airbag shutoff. The PASSENGER AIR BAG OFF indicator lamp must be lit. Suitability of
the seats for attaching ISOFIX
ch ild restra int sy stems
Obser vethefo llowing information:
R When using a baby car seat of cate‐
gory 0/0+ and a rear wa rd-facing child
re stra int sy stem of category I on a rear
seat: adjustthe driver's and front passenger
seat such that the seat does not touch the
ch ild restra int sy stem. R
When using a forw ard-facing child
re stra int sy stem of category I: remo vethe
head restra int from there spective seat, if
possible (→ page 93). In addition, the seat
backrest of thech ild restra int sy stem must,
as far as possible, lie flat against the back‐
re st of theve hicle seat.
R When youre mo vethech ild restra int sy stem,
fi t th e head restra int immediately (→
page 93) and adjust all the head
re stra ints again cor rectl y.
R For cer tain child restra int sy stems in weight
categories II or III, there might be restrictions
in the maximum size setting, e.g. due topos‐
sible con tact wi th thero of.
R Make sure that thech ild's feet do not touch
th e front seat. If necessar y,mo vethe front
seat forw ard slightl y. Occupant saf
ety51

We
ight categories Size categoryEquipment Rear seat
Left ,ri ght
Category 0+: upto13 kgand appr ox.15 months E
D
CISO/R1
ISO/R2
ISO/R3IL
IL
IL
1
Category I:9to 18 kgand between appr ox. 9 months and 4 yearsD
C
B
B1
A ISO/R2
ISO/R3
ISO/F2
ISO/F2X
ISO/F3IL
IL
1
IUF
IUF
X
1 When using a child restra int sy stem of size category C (ISO/R3), mo vethe front seat tothe highest position and mo vethe seat backrest toan
upright position. Make sure that the seat backrest of the front seat does not rest against thech ild restra int sy stem. Suitability of
the seats for attaching i‑Size
ch ild restra int sy stems
Obser vethefo llowing information:
R When using a rear wa rd-facing child
re stra int sy stem: adjust the front seat so
th at it does not touch thech ild restra int sys‐
te m. R
When using a forw ard-facing child
re stra int sy stem: remo vethe head restra int
from there spective seat, if possible
(→ page 93). In addition, the seat backrest of
th ech ild restra int sy stem must, as far as
possible, lie flat against the backrest of the
ve hicle seat. R
When youre mo vethech ild restra int sy stem,
fi t th e head restra int immediately
(→ page 93) and adjust all the head
re stra ints again cor rectly.
R Makesure that thech ild's feet do not touch
th e front seat. If necessar y,mo vethe front
seat forw ard slightl y. Occupant saf
ety53