Page 49 of 585

Sy
stem limitations
The sy stem will no tinitiat eanyaction in thef ol‐
lowing situations:
R when reve rsing
or
R when thev ehicle is towing atrailer and there
is ar isk of arear impact
The sy stem will no tinitiat eanybraking applica‐
tion in thef ollowing situations:
R whils tdriving
or
R when entering or exitin gap arkin gspace
while using ActiveP arking Assist 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 rdst he centre ofthev ehicle. It does this by
ra pidl yinflating an air cushion in theo uter seat
side bols teroft he seat backres tonthe side on
whic hthe impact is anticipated. This increases th
ed ista nce betwee nthe door and thev ehicle
occupant.
If PRE-SAFE ®
Impulse Side has been deplo yedor
is faulty ,the PRE-SAFE impulse side inoperative
See Owner's Manual displaymessag eisshown
(→ pag e466). Children in
thev ehicle Note
sont he saf etransportation of children &
WARNING Risk of accident and inju ry
due tochildren lef tunat tende dint he
ve hicle
If yo ul eave children unat tende dint hevehi‐
cle, they ma ybea bletos etthev ehicle in
motion, fore xamp leby:
R Releasing thep arking brake.
R Shifting thet ransmission out of park
position j.
R Startin gthe engine.
In addition, they ma yoperat evehicle equip‐
ment. #
Neverlea ve children and animals unat‐
te nde dint hevehicle. #
When leaving thev ehicle, alw ayst ake
th ek eywit hyou and loc kthe vehicle.
This also applies tomobil ephones if the
"Digital Car Keyint he smartphone"
function is activated via theM ercedes
me connect weba pp. &
WARNING Thisp oses an increased risk
of deat hduetoheat strokeorexposure
to cold in thev ehicle
If persons –particularly children –expe ri‐
enc eprolonged exposur etoextremely high
or lo wtemperatures, this poses arisk of
inju ryor eve nfatal injur y. #
Neverlea ve anyone –p articularly chil‐
dren –unat tende dint hevehicle. &
WARNING Risk of bu rnsw hen thec hild
seat is exposed todirect sunlight
If th ec hild restra int sy stem is exposed to
direct sunlight or heat, parts could heat up. 46
Occupant saf ety
Page 50 of 585

Children could suf
ferb urns on these parts,
particularly on me tallic parts of thec hild
re stra int sy stem. #
Alw aysm akes uret hat thec hild
re stra int sy stem is no texpose dto
direct sunlight. #
Protect it wit hablanket,for example. #
Ifth ec hild restra int sy stem has been
ex posed todirect sunlight ,allowitto
cool befor esecu ring achild int oit. #
Neverlea ve children unat tende dint he
ve hicle. To
impr oveprotection forc hildren younger than
12 yearso ld or unde r1.50 minh eight,
Mercedes-Benz recommends youo bse rvet he
fo llowing information:
R Onlysecur echildren using achild restra int
sy stem whic hisappropriat etothe height,
ag ea nd weight of thec hild and suitable for
Mercedes-Benzv ehicles. Be suretoobserve
th ei nstruction sfor cor rect us eoft hechild
re stra int sy stem. R
Alw aysi ns tallac hild restra int sy stem on a
re ar seat if possible.
R Onlyuse thef ollowing securing sy stems for
ch ild restra int sy stems:
- thes eat belt sy stem
- theI SOFIX or i-Siz emounting brac kets
- theT op Tether anchorages
R The manufacturer's ins tallation instructions
fo rt he child restra int sy stem.
R The warning labels in thev ehicle interior and
on thec hild restra int sy stem. &
WARNING Risk of inju ryor deat hcaused
by incor rect ins tallation of thec hild
re stra int sy stem
If th ec hild restra int sy stem is incor rectly
ins talled on asuitable seatin gposition, it
canno tperform its intended pr otectiv efunc‐
tion.
The child canno tberestrained in thee vent of
an accident, heavy braking or asudden
ch ang eofd irection. #
Alw aysc ompl ywitht he manufacturer's
ins tallation instructions fort he child
re stra int sy stem and its cor rect use. #
Makesur ethat thee ntir ebase of the
ch ild restra int sy stem alw aysr ests on
th es itting sur face of thes eat. #
Neverp lace objects under or behind
th ec hild restra int sy stem, e.g. cush‐
ions. #
Alw aysu sechild restra int sy stems with
th eo riginal co verd esigned fort hem. #
Alw aysr eplace damaged co vers with
ge nuine co vers. &
WARNING Risk of accident caused by
incor rectl yins tal led child restra int sys‐
te ms
If th ec hild restra int sy stem is no tcorrectly
ins talled or secured, it could release in the
ev ent of an accident, sudden braking or a
sudden chang eind irection. Occupan
tsafety 47
Page 51 of 585

The
child restra int sy stem could be flung
aroun dand hit vehicle occupants. This poses
an increased risk of injur yorevend eath! #
Alw aysi ns tallch ild restra int sy stems
cor rectl y,eve nw henn otin use. #
Alw aysc ompl ywitht he child restra int
sy stem manufacturer's ins tallation
instructions. &
WARNING Risk of inju ryor deat hcaused
by theu se of damaged child restra int
sy stems
Child restra int sy stems or their retainin gsys‐
te ms that ha vebeen subjec tedtoal oad in
an acciden tmaythen no tbea bletoper form
th eir intended pr otectiv efunction.
The child canno tberestrained in thee vent of
an accident, heavy braking or asudden
ch ang eofd irection. #
Alw aysr eplace child restra int sy stems
immediatel ythat ha vebeen damaged or
in vo lved in an accident. #
Have thes ecuring sy stems fort he child
re stra int sy stems checkedataq ualified
specialis tworks hop befor einstalling a
ch ild restra int sy stem again. %
Use Mercedes-Benz car eproducts recom‐
mended byMercedes-Benztoc leanchild
re stra int sy stems. Further information can
be obtained at aqualified specialis twork‐
shop.
The following no tesm ustbeo bserved:
R When ins talling achild restra int sy stem on
th ef ront passenger seat, thei nformation on
ins talling achild restra int sy stem on thef ront
passenger seat (→ page52).
R Notesona ttaching suitable child restra int
sy stems (→ page54).
R Notesonr ecommende dchild restra int sys‐
te ms (→ page61).
R Instructions and saf etyn otes on thea uto‐
matic front passenger airbag shutoff
(→ pag e40).
R Safetyn otes on thes eat belt (→ page33). R
Information on thec orrect us eoft he seat
belt (→ page37). ISOFIX and i-Size
child seat securing sy stems Information on
theI SOFIX and i-Siz echild
sea tsecuring sy stems &
WARNING Risk of inju ryor fata linjur yif
th ec hild secured weighs mor ethan the
permissible gross weight foranI SOFIX or
i‑Size child restra int sy stem
Fo rISOFIX or i‑Size child restra int sy stems in
whic hthe child is secured using thes eat belt
integrated in thec hild restra int sy stem, the
permissible gross weight of thec hild and
ch ild restra int sy stem is 33 kg.
If th ec hild and thec hild restra int sy stem
to get her weigh mor ethan 33 kg,the ISOFIX
or i‑Size child restra int sy stem wit hintegra‐
te ds eat belt does no toffer suf ficient pr otec‐
tion .Too muc hload ma ybeplaced on the
ISOFIX or i‑Size child restra int sy stems and
th ec hild ma ynotbe restra ined cor rectl yin
th ee vent of an accident, fore xamp le. 48
Occupan tsafety
Page 52 of 585

#
Ifth ec hild and thec hild restra int sys‐
te mt ogether weigh mor ethan 33 kg,
onl yuse an ISOFIX or i‑Sizec hild
re stra int sy stem wit hwhichthe child is
secured wit hthe vehicle seat belt. #
Also secur ethe child restra int sy stem
wit hthe TopT ether belt, if available. Alw
aysc ompl ywitht he information about the
mass of thec hild restra int sy stem
R inthem anufacturer's ins tallation and operat‐
ing instructions fort he child restra int sy stem
used
R onalabel on thec hild restra int sy stem, if
present
Re gularly checkt hat thep ermissible gross mass
of thec hild and child restra int sy stem is still
being adhered to.
When using achild restra int sy stem, be sur eto
obser vethem anufacturer's ins tallation and
operatin ginstructions as well as its cor rect use
and thes uitability of thes eats fora ttaching a
ch ild restra int sy stem. ISOFIX and i-Siz
earestandardised securing sys‐
te ms fors pecia lrestraint sy stems. ISOFIX child
re stra int sy stems ar eappr ove dina ccordance
wit hE CE R44, i‑Siz echild restra int sy stems are
appr ovedina ccordance wit hECE R129.
Onl ychild restra int sy stems that ha vebeen
appr ovedina ccordance wit hECE R4 4maybe
attached toISOFIX mounting brac kets.
The following child restra int sy stems can be
attached toi-Size securing rings:
R ISOFI Xchild restra int sy stems that are
appr ovedina ccordance wit hECE R44
R i‑Siz echild restra int sy stems that are
appr ovedina ccordance wit hECE R129 1
Symbol forf ittin ganI SOFIX child restra int
sy stem
2 Symbol forf ittin gani -Sizechild restra int
sy stem Occupant saf
ety49
Page 53 of 585

Fi
ttin gISOFI Xand i-Size child seat attach‐
ments &
WARNING Risk of inju ryor fata linjur yif
th ec hild secured weighs mor ethan the
permissible gross weight foranI SOFIX or
i‑Size child restra int sy stem
Fo rISOFIX or i‑Size child restra int sy stems in
whic hthe child is secured using thes eat belt
integrated in thec hild restra int sy stem, the
permissible gross weight of thec hild and
ch ild restra int sy stem is 33 kg.
If th ec hild and thec hild restra int sy stem
to ge ther we igh mor ethan 33 kg,the ISOFIX
or i‑Size child restra int sy stem wit hintegra‐
te ds eat belt does no toffer suf ficient pr otec‐
tion .Too muc hload ma ybeplaced on the
ISOFIX or i‑Size child restra int sy stems and
th ec hild ma ynotbe restra ined cor rectly in
th ee vent of an accident, fore xamp le. #
Ifth ec hild and thec hild restra int sys‐
te mt ogether weigh mor ethan 33 kg,
onl yuse an ISOFIX or i‑Sizec hild re
stra int sy stem wit hwhichthe child is
secured wit hthe vehicle seat belt. #
Also secur ethe child restra int sy stem
wit hthe TopT ether belt, if available. Alw
aysc ompl ywitht he information about the
mass of thec hild restra int sy stem
R inthem anufacturer's ins tallation and operat‐
ing instructions fort he child restra int sy stem
used
R onalabel on thec hild restra int sy stem, if
present
Re gularly checkt hat thep ermissible gross mass
of thec hild and child restra int sy stem is still
being adhered to.
When using achild restra int sy stem, be sur eto
obser vethem anufacturer's ins tallation and
operatin ginstructions as well as its cor rect use
and thes uitability of thes eats fora ttaching a
ch ild restra int sy stem.
Befor eevery trip ,makes uret hat theI SOFIX
ch ild restra int sy stem or thei -Sizec hildrestra int
sy stem is engaged cor rectl yinb othI SOFIX or
i‑Size mounting brac kets. 1
ISOFIX mounting brac kets
2 i-Size mounting brac kets
* NO
TEDama getothes eat belt fort he
centr eseat Whe
nfittin gac hildrestra int sy stem, thes eat
belt fort he centre seat could be damaged. 50
Occupant saf ety
Page 54 of 585

#
Mak esuret hat thes eat belt is no ttrap‐
ped. #
Remo veeac hcover forI SOFIX mounting
brac kets 1 or i‑Size mounting brac kets 2. #
Attach theI SOFIX child restra int sy stem to
bo th ISOFIX mounting brac kets 1 or i‑Size
mounting brac kets 2.
or #
Attach thei ‑Sizec hildrestra int sy stem to
bo th i‑Size mountin gbrack ets 2. #
Afterr emoving thec hild seat, replace each
co verfor ISOFIXm ounting brac kets 1 or
i‑Size mounting brac kets 2. Secu
ring TopT ether &
WARNING Risk of inju ryor deat hifthe
re ar seat backrests ar enotloc keda fter
fi tting TopT ether belts
If th er ear seat backrests ar enotloc ked, they
could fold forw ards in thee vent of an acci‐ dent, heavy braking or sudden
changes of
direction.
As aresult, child restra int sy stems cann ot
per form their intended pr otectiv efunction.
Re ar seat backrests that ar enotloc kedc an
also cause additional injuries, e.g. in the
ev ent of an accident. #
Alw aysl oc kr ear seat backrests af ter
fi tting TopT ether belts. #
Obser vethel oc kv erification ind icator. If
th es eat backres tisnotengaged and loc ked,
th is will be shown on them ultifunction display
on thei nstrument clus ter.
The risk of injur ycan be reduced byTopT ether
as TopT ether pr ovides an additional connection
between thec hild restra int sy stem secured with
ISOFIX or i-Siz eand thev ehicle.
The child restra int sy stem mus tbeequipped
wit haT opTether belt. Occupant saf
ety51
Page 55 of 585

#
If necessar y,mo vehead restra int 1
upwards Adjusting ther ear seat head
re stra ints(→ page100). #
FittheI SOFIX or i-Siz echild restra int sy stem
wit hTop Tether.A lway sc omply wit hthe child
re stra int sy stem manufacturer's ins tallation
instructions when doing so. #
RouteT op Tether belt 5under head
re stra int 1 between thet wo head restra int
bars. #
Guide TopT ether belt 5down wards
between combined luggag ecover and net 3
and backrest 2.#
Hook TopT ether hook 6ofTopT ether belt
5 without twisting int oTop Tether anchor‐
age 4. #
Tension TopT ether belt 5.Alway sc omply
wit hthe child restra int sy stem manufactur‐
er's ins tallation instructions when doing so. #
If necessar y,mo vehead restra int 1 down‐
wa rdsA dju sting ther ear seat head
re stra ints(→ page100) .Makes uret hat you
do no tinter fere wit hthe routin gofT op
Te ther belt 5. Child
restra int sy stems on thef ront
passenger seat Note
sonc hildrestra int sy stems on thef ront
passenger seat
Ac cident statistic sshowt hat children secured in
th er ear seats ar esafer than children secured in
th ef ront seats. Forthis reason ,Mercedes-Benz
stro ngly advises that youi nstallac hild restra int
sy stem on arear seat.
If it is absolutel ynecessar ytoinstallac hild
re stra int sy stem on thef ront passenger seat,
alw ayso bser vethei nformation on thea utomatic
front passenger airbag shutof f(→pag e40).
By doing this, youc an avo idrisk sc aused by:
R Achild restra int sy stem that is no tdetected
by thea utomatic front passenger airbag
shutoff.
R The unintentionally disabled front passenger
airbag.
R Incor rect positioning of thec hild restra int
sy stem. Wa
rning notic eonthe front-passenge rsun
visor: &
WARNING Risk of inju ryor deat hfrom
using arear ward-facing child restra int
sy stem when thef ront passenger airbag
is enabled
If yo us ecur eac hild in arear ward-facing
ch ild restra int sy stem on thef ront passenger
seat and theP ASSENGER AIR BAGO FFindi‐
cator lam pisoff,t he front passenger airbag
can deplo yintheevent of an accident.
The child could be stru ck bythea irbag. 52
Occupant saf ety
Page 56 of 585

Alw
ayse nsur ethat thef ront passenger air‐
bag is disabled. The PASSENGER AIR BAG
OFF indicator lam pmustbel it.
NEVER use arear wardfacing child restra int
on aseat pr otected byan ACTIVE FRONT
AIRB AGin front of it ;DEATH or SERIOUS
INJUR YtotheCHILD can occur. If
th eP ASSENGER AIR BAGO FFindicator lamp
goes out ,the front passenger airbag is enabled.
Be sur etoobservethen otes on thes afet rans‐
por tatio nofc hildren (→ page46).
Note sonv ehicles withou tthe automatic
front passenger front airba gdeactivation
sy stem
Ve hicles without automatic front passenger front
airbag deactivation sy stem ha veas pecial sticker
af fixe dtot he side of thec ockpit on thef ront
passenger side. Ne
verins tallar ear ward-facing child restra int
sy stem on thef ront passenger seat:
Mak esurey ou obser vethef ollowing informa‐
tion:
R Onforw ard-facin gand rear wa rd-facing child
re stra int sy stems on thef ront passenger seat
(→ pag e53).
R On attaching suitable child restra int sy stems
(→ pag e54). Note
sonf orwa rd-facin gand rear wa rd-facing
ch ild restra int sy stems on thef ront
passenger seat
When using arear ward-facing child restra int sys‐
te mont he front passenger seat, thef ront
passenger front airbag mus talway sbed isabled.
This is onl ythe case if theP ASSENGER AIR BAG
OFF indicator lam pislit continuously
(→ pag e42).
When using thec hild restra int sy stem on the
front passenger seat, it is essentia ltoobserve
th ef ollowing:
R Movethef ront passenger seat as farb ackas
possible.
R Setthe seat backres ttoanalmostvertical
position.
R Retract thes eat cushion lengt hasfar as pos‐
sible.
R Thee ntir ebase of thec hild restra int sy stem
mus talway sr estont he sitting sur face of the
front passenger seat.
R The backres toftheforw ard-facin gchild
re stra int sy stem must, as farasp ossible, be
re sting on thes eat backres tofthe front Occupant saf
ety53