
&
WARNING Risk of inju ryor death when
using a rear wa rd-facing child restra int
sy stem while 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 theev ent 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.
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 66).
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 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
th at is positioned too close tothe cockpit, in
th eev ent of an accident, thech ild could:
R come into con tact wi thparts of theve hi‐
cle's interior if thePA SSENGER AIR BAG
OFF indicator 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 front passenger
seat accordingly. #
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 66).
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. 48
Occupant saf ety

A pe
rson 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
with a build cor responding tothat of an adult
should 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 either lights up continuously
or remains off, depending on the classifica‐
tion.
- 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 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 self-test, the co-
driver airbag is disabled.
If th e co-driver seat is occupied, alw ays
ensure that:
R The classification of the person in the co-
driver seat is cor rect, and the co-driver
airbag is enabled or disabled as is appro‐
priate forth e person in the co-driver seat.
R The person is seated proper lywith a cor‐
re ctly fastened seat belt. Be sure
toalso obse rveth efo llowing fur ther
re lated subjects:
R Securing thech ild restra int sy stem on the
front passenger seat (/ page 66)R
Suitable positioning of thech ild restra int sys‐
te m (/ page 56) 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. Occupant saf
ety49

R
PRE-SAFE ®
Sound: pr ovided that the multi‐
media sy stem is switched on, generates a
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 50
Occupant saf ety

De
tecting risks, avoiding dan ger Securing sy
stems forch ild restra int sy stems
in theve hicle
Only use thefo llowing securing sy stems forch ild
re stra int sy stems:
R the ISOFIX or i-Size securing rings
R theve hicle's seat belt sy stem
R theTo pTe ther anchorages
Fitting an ISOFIX or an i-Size child restra int sys‐
te m is prefer red.
Simply attaching tothe securing rings on the
ve hicle can reduce therisk of fitting thech ild
re stra int sy stem incor rectl y.
When securing a child with the integrated seat
belt of the ISOFIX or i-Size child restra int sys‐
te m, alw ays comply with the permissible gross
we ight forth ech ild and child restra int sy stem
(/ page 59).
Ad vantage of a rear wa rd-facing child
re stra int sy stem
It is preferable totranspo rta baby or a small
ch ild in a suitable rear wa rd-facing child restra int sy
stem. In this case, thech ild sits in the oppo‐
site direction tothe direction of tra vel and faces
ba ckwa rds.
Babies and small children ha vecompa ratively
we ak neck muscles in relation tothe size and
we ight of their head. The risk of injury tothe cer‐
vical spine during an accident can be reduced in
a re ar wa rd-facing child restra int sy stem.
Alw ays secure a child restra int sy stem cor‐
re ctly &
WARNING Risk of inju ryor death due to
incor rect ins tallation of thech ild
re stra int sy stem
The child can then not be pr otected or
re stra ined as intended. #
Be sure tocomply wi th the manufactur‐
er's ins tallation instructions forthe
ch ild restra int sy stem and its cor rect
use. #
Makesure that the entire base of the
ch ild restra int sy stem alw aysre sts on
th e sitting sur face of the seat. #
Never place objects (e.g. cushions)
under or behind thech ild restra int sys‐
te m. #
Use child restra int sy stems only with
th e original co ver designed forth em. #
Alw aysre place damaged co vers with
ge nuine co vers. &
WARNING Risk of inju ryor death due to
unsecured child restra int sy stems in the
ve hicle
If th ech ild restra int sy stem is incor rectly fit‐
te d or not secured, it can come loose.
The child restra int sy stem could be flung
around and hit vehicle occupants. #
Alw ays ins tallch ild restra int sy stems
cor rectl y,eve n when not in use. #
Alw ays comply with thech ild restra int
sy stem manufacturer's ins tallation
instructions. R
Alw ays obser vethech ild restra int sy stem
manufacturer's ins tallation and operating 52
Occupant saf ety

instructions as
well as theve hicle-specific
information:
- Fitting the ISOFIX or i-Size child restra int
sy stem tothere ar seat (/ page 59).
- Securing thech ild restra int sy stem with
th e seat belt on there ar seat
(/ page 64).
- Securing thech ild restra int sy stem with
th e seat belt on the front passenger seat
(/ page 67). Obser vethe specific
instructions forth ere ar wa rd-facing and
fo rw ard-facing child restra int sy stems
(/ page 66).
If th e front passenger seat is occupied,
ensure, bo thbefore and during the jour‐
ne y,that thest atus of the front
passenger airbag is cor rect forth e cur‐
re nt situation (/ page 47).
R Obse rveth ewa rning labels in theve hicle
interior and on thech ild restra int sy stem.
R Also secure TopTe ther if present. Do not modify
thech ild restra int sy stem &
WARNING Risk of inju rydue tomodifi‐
cations tothech ild restra int sy stem
The child restra int sy stem can no longer
function properly. This poses an increased
ri sk of injur y. #
Never modify a child restra int sy stem. #
Only af fix accesso ries which ha vebeen
specially appr oved forth is ch ild
re stra int sy stem bythech ild restra int
sy stem's manufacturer. Mercedes‑Benz
recommends Mercedes-Benz
care products for cleaning child restra int sys‐
te ms recommended byMercedes-Benz. Only use
child restra int sy stems which are in
proper working condition &
WARNING Risk of inju ryor death caused
by the use of damaged child restra int
sy stems
Child restra int sy stems or their retaining sys‐
te ms that ha vebeen subjec tedto stre ss in
an accident may not be able toper form their
intended pr otective function.
It may be the case that thech ild cannot be
proper lyrestra ined. #
Alw ays immediately replace child
re stra int sy stems that ha vebeen dam‐
aged or in volved in an accident. #
Have the securing sy stems forth ech ild
re stra int sy stems checked at a qualified
specialist workshop before ins talling a
ch ild restra int sy stem again. Occupant saf
ety53

Av
oid direct sunlight &
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 from these parts,
particularly on the 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 thech ild restra int sy stem, e.g.
with a blank et. #
Ifth ech ild restra int sy stem has been
ex posed todirect sunlight, allow it to
cool before secu ring a child in it. #
Never lea vechildren unat tended in the
ve hicle. Obser
vewhen stopping or parking &
WARNING Risk of accident and inju ry
due tochildren left unat tended in the
ve hicle
If ch ildren are left unsupervised in theve hi‐
cle, they could, in pa rticular:
R open doors, thereby endangering other
persons or road users.
R get out and be stru ck byoncoming traf‐
fi c.
R ope rate ve hicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion, forex ample by:
R releasing the parking brake.
R changing the transmission position.
R starting theve hicle. #
Never lea vechildren unat tended in the
ve hicle. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle. #
Keep theve hicle key out of reach of
ch ildren. This also applies
tothe Digital Vehicle Key
st icke r. &
WARNING Risk offata l injury due to
ex posure toextreme heat or cold in the
ve hicle
If people –particularly children – are exposed
to extreme temp eratures over an extended
pe riod of time, there is a risk of serious or
ev en fata l injury! #
Never lea veanyone – pa rticularly chil‐
dren – unat tended in theve hicle. #
Never lea veanimals in theve hicle unat‐
te nded. 54
Occupant saf ety

Size class –
Equipment
Left/right
rear seat
B1 – ISO/F2X IUF
A – ISO/F3 IUF
IL Suitable for ISOFIX child restra int sy stems according tothe
ta ble in "Overview of there commended child restra int sy stems",
or if theve hicle and the seat are lis ted on thech ild restrai nt sys‐
te m manufacturer's vehicle model list.
IUF Suitable forfo rw ard-facing ISOFIX child restra int sy stems of
th e "Universal" category in this we ight group.
(1) When using a child restrai nt sy stem of size class (ISO/R3),
mo vethe front seat into the highest position. Make sure that the
seat backrest of the front seat does not rest against thech ild
re stra int sy stem. Overview of suitability of
the seats for
attaching i‑Size child restra int sy stems
i‑Size is a standardised securing sy stem for spe‐
cially designed restra int sy stems.
° The symbol indicates seats suitable for
attaching an i‑Size child restra int sy stem in accordance with UN R129
(/
page 56).
Child restra int sy stems that are permit ted
in accordance with UN R44 as per the
ISOFIX tables (/ page 58) or UN R129 as
per thefo llowing i‑Size tables may be
attached.
i‑Size child restra int sy stems (ISO/R2, ISO/
F2X) Fr
ont passenger
seat Left/right
rear seat
Xi ‑U
X Not suitable for an i-Size
ch ild restrai nt sy stem in the
"Universal" categor y.i-U Suitable
forfo rw ard-facing
and rear wa rd-facing i-Size
ch ild restrai nt sy stems in the
"Universal" categor y. Fi
tting an ISOFIX or i‑Size child restra int sys‐
te m on the rear seat &
WARNING Risk of accident if there ar
ben chseat, rear seat and seat backrest
are not engaged
The rear ben chseat, rear seat and seat back‐
re st may fold forw ards, even while theve hi‐
cle is in motion.
R As a result, theve hicle occupant will be
pressed into the seat belt with increased
fo rc e. The seat belt will not be able to
pr otect as intended and could cause
additional injur y.
R Objects or loads in the boot or load com‐
partment cann otbe restra ined bythe
seat backrest. #
Make sure that there ar ben chseat, the
re ar seat and the seat backrest are
engaged before everytrip. If
th e left and right seat backrests are not
engaged and loc ked in place, this will be shown Occupant saf
ety59

on
the multifunction display on the instrument
clus ter.
If th e cent reseat backrest is not engaged and
loc ked in place, there d lock verification indica‐
to r will be visible. &
WARNING Risk of inju ryor death if the
permissible gross mass of thech ild and
ch ild restra int sy stem is exceeded.
To o much load may be placed on the ISOFIX
or i‑Size child restra int sy stems and thech ild
may not be restra ined cor rectly in theeve nt
of an accident, forex ample. #
Ifth ech ild and thech ild restra int sys‐
te m toget her weigh more than 33 kg,
use on lyan ISOFIX or i‑Size child
re stra int sy stem that secures thech ild
using theve hicle seat belt. #
Also secure thech ild restra int sy stem
with theTo pTe ther belt, if available. Alw
ays comply with the information about the
mass of thech ild restra int sy stem:
R inthe manufacturer's ins tallation and operat‐
ing instructions forth ech ild restra int sy stem
used
R on a label on thech ild restra int sy stem, if
present
Re gular lych eck that the permissible gross mass
of thech ild and child restra int sy stem is still
complied with.
When fitting a child restra int sy stem, obser ve
th efo llowing:
O Alw
ays obser vethe cor rect use of the seats
and consider their suitability for attaching a
ch ild restra int sy stem.
ISOFIX child seat securing sy stem
(/ page 58)
or
i‑Size child seat securing sy stem
(/ page 59) O
Alw
ays comply with the manufacturer's
ins tallation and operating instructions for
th ech ild restra int sy stem used.
O Make sure
that thech ild's feet do not touch
th e front seat. If necessar y,mo vethe front
seat slightly forw ards.
®When fitting an ISOFIX child restra int sys‐
te m, also obser vethefo llowing:
O When using a Group 0/0+ baby car seat
and a Group 1 rear wa rd-facing child
re stra int sy stem on a rear seat: adjust
th e front seat so that the seat does not
to uch thech ild restra int sy stem.
O When using a Group 1
forw ard-facing
ch ild restra int sy stem: the backrest of the
ch ild restra int sy stem must lie as flat as
possible against the backrest of theve hicle
seat.
O Yo
u can ha vethe head restra ints of there ar
seats remo ved and ins talled byaqu alified
specialist workshop. This may be necessary
fo rth e use of cer tain child restra int sys‐
te ms. 60
Occupant saf ety