Page 49 of 482

&WARNING Risk of accident caused by
incor rectly ins talled child restra int sys‐
te ms
If th ech ild restra int sy stem is not cor rectly
ins talled or secured, it could release in the
ev ent of an accident, sudden braking or a
sudden change in direction.
The child restra int sy stem could be flung
around and hit vehicle occupants. This poses
an increased risk of injury or even fata l
injur y.
#Always 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.
& WARNING Risk of injury or 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 a load in
an accident may then not be able toper form
th eir intended pr otective function.
The child cannot be restra ined in theeve nt of
an accident, heavy braking or a sudden
ch ange of direction.
#Alw aysre place child restra int sy stems
immediately that ha vebeen damaged or
in vo lved in an accident.
#Ha ve 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.
A boos ter seat may be necessary toachie ve
proper seat belt positioning forch ildren over
40 lbs (18 kg) in weight until they reach a height
where a thre e-point seat belt can be ins talled
proper lywithout a boos ter seat.
The following no tes must be obser ved:
RWhen ins talling a child restra int sy stem on
th e front passenger seat, the information on
ins talling a child restra int sy stem on the front
passenger seat (
→page 51).
RInstructions and saf etyno tes on the auto‐
matic front passenger airbag shutoff
(
→page 39).
RSaf etyno tes on the seat belt (→page 33).
RInformation on the cor rect use of the seat
belt (→page 36).
Ac tivating/deactivating the child seat saf ety
fe ature of the seat belt
&
WARNING Risk of injury or death if a
seat belt is unfas tened while theve hicle
is in motion
If th e seat belt is released while theve hicle is
in motion, thech ild restra int sy stem is no
longer cor rectly secure d. Thechild seat
saf etyfe ature is deactivated and the seat
belt is dr awn in a bit bythe inertia reel.
It is therefore not possible toengage the seat
belt again.
#Pull over and stop theve hicle safely as
soon as possible, paying attention to
ro ad and traf fic conditions.
Occupant saf ety 47
Page 50 of 482

#Activate thech ild seat saf etyfe ature
again and cor rectly secure thech ild
re stra int sy stem.
When enabled, thech ild seat saf etyfe ature
ensures that the seat belts of the front
passenger seat and rear seats do not slac ken
once thech ild restra int sy stem is secured.
Installing a child restra int sy stem:
#Alw ays comply with the manufacturer's
ins tallation instructions when ins talling and
re moving thech ild restra int sy stem.
#Pull the seat belt smoo thly from the seat belt
outlet.
#En gage the seat belt tongue in the seat belt
buckle.
Ac tivating the child seat saf etyfe ature:
#Pull the seat belt out fully and let the inertia
re el retract it again.
When thech ild seat saf etyfe ature is activa‐
te d,you should hear a ratcheting sound.
#Push thech ild restra int sy stem down until
th e seat belt sits tightly. Deactivating the
child seat saf etyfe ature:
#Press there lease button of the seat belt
buckle.
#Hold the seat belt tongue and guide it ba ck
to the seat belt outlet.
LA TC H-type (ISOFIX) child seat attachment
Note s onLATC H-type (ISOFIX) child seat
securing sy stems
&
WARNING Risk of injury or death when
using theLA TC H-type (ISOFIX) child
re stra int sy stem and exceeding the per‐
missible weight limit
LA TC H-type (ISOFIX) child restra int sy stems
do not of fer suf ficient pr otection forch ildren
we ighing more than 49 lb (22 kg), who are
secured using the seat belt integrated in the
ch ild restra int sy stem.
Fo rex ample, thech ild may not be restra ined
cor rectly in theeve nt of an accident.
#Ifth ech ild weighs more than 49 lb
(22 kg),only use LATC H-type (ISOFIX)
child restra int sy stems with which the
ch ild is secured with theve hicle seat
belt.
#Also secure thech ild restra int sy stem
with theTo pTe ther belt, if available.
When ins talling a child restra int sy stem, be sure
to obser vethe manufacturer's ins tallation and
operating instructions and the instructions for
cor rect use of thech ild restra int sy stem.
ISOFIX is a standardized securing sy stem for
specially designed restra int sy stems. LATC H-
type (ISOFIX) child restra int sy stems are
appr oved in accordance with ECE R-44 .
Only child restra int sy stems that ha vebeen
appr oved in accordance with ECE R-44 may be
attached toLATC H-type (ISOFIX) mounting
brac kets.
48
Occupant safe ty
Page 51 of 482

Symbolfor ins talling a LATC H-type (ISOFIX)
ch ild restra int sy stem Installing
LATC H-type (ISOFIX) child seat
attachments
& WARNING Risk of injury when usingthe
LA TC H-type (ISOFIX) child restra int sys‐
te m and exceeding the permissible
we ight
LA TC H-type (ISOFIX) child restra int sy stems
do not of fer suf ficient pr otection forch ildren
we ighing more than 49 lb (22 kg) who are
secured using the seat belt integrated in the
ch ild restra int sy stem.
Fo rex ample, thech ild may not be restra ined
cor rectly in theeve nt of an accident. This
poses an increased risk of injury or even
fa ta l injur y.
#Ifth ech ild weighs more than 49 lb
(22 kg),only use LATC H-type (ISOFIX)
ch ild restra int sy stems with which the
ch ild is secured using the seat belt of
th eve hicle seat.
#Also secure thech ild restra int sy stem
with theTo pTe ther belt, if available.
When ins talling a child restra int sy stem, be sure
to obser vethe manufacturer's ins tallation
instructions and the instructions for cor rect use
of thech ild restra int sy stem.
Before every trip, make sure that theLA TC H-type
(ISOFIX) child restra int sy stem is engaged cor‐
re ctly in bo thLATC H-type (ISOFIX) mounting
brac kets.
Occupant safe ty49
Page 52 of 482

1LATC H-type (ISOFIX) mounting brac kets
* NO
TEDama getothe seat belt forth e
center seat
When ins talling a child restra int sy stem, the
seat belt forth e center seat could be dam‐
aged.
#Make sure that the seat belt is not trap‐
ped.
#Re mo veeach co verfo rLA TC H-type (ISOFIX)
mounting brac kets 1.
#Attach theLA TC H-type (ISOFIX) child
re stra int sy stem toboth LATC H-type (ISOFIX)
mounting brac kets 1.
#Afterre moving thech ild seat, replace each
co verfo rLA TC H-type (ISOFIX) mounting
brac kets 1.
Secu ring TopTe ther
&
WARNING Risk of injury ifth e seat
backrests of there ar seats are not
loc ked af ter ins talling theTo pTe ther
belts
If th ere ar seat backrests are not loc ked, they
could fold forw ards in theeve nt of an acci‐
dent, heavy braking or sudden changes of
direction.
As a result, child restra int sy stems cannot
per form their intended pr otective function.
Re ar seat backrests that are not loc ked can
also cause additional injuries, e.g. in the
ev ent of an accident. This poses an
increased risk of injury or even fata l injur y.
#Always lock there ar seat backrests
af te r ins talling theTo pTe ther belts.
#Obser vethe lock verification indicator.
If th e seat backrest is not engaged and loc ked,
th is will be shown in the multifunction display in
th e instrument clus ter.
The risk of injury can be reduced byTopTe ther
as TopTe ther pr ovides an additional connection
between thech ild restra int sy stem secured with
LA TC H-type (ISOFIX) and theve hicle.
The child restra int sy stem must be equipped
with a TopTe ther belt.
50
Occupant saf ety
Page 53 of 482

#If necessary,mo vehead restra int 1
upwards (→page 88).
#Fo ld up co ver2 ofTopTe ther anchorage
3.
#Ins tallth eLA TC H-type (ISOFIX) child restra int
sy stem with TopTe ther. Alw ays comply with
th ech ild restra int sy stem manufacturer's
ins tallation instructions when doing so.
#Ro ute TopTe ther belt 5under head
re stra int 1 between the two head restra int
bars.
#Hook TopTe ther hook 4ofTopTe ther belt
5 without twisting into TopTe ther anchor‐
age 3.
#Tension TopTe ther belt 5. Alw ays comply
with thech ild restra int sy stem manufactur‐
er's ins tallation instructions when doing so.
#Fo ld down co ver2 ofTopTe ther anchorage
3.
#If necessar y,mo vehead restra int 1 down‐
wa rds (→page 88). Make sure that you do
not inter fere with the cor rect routing of Top
Te ther belt 5.
Childrestra int sy stems on the front
passenger seat
Note s onchild restra int sy stems on the front
passenger seat
Ac cident statistics show that children secured in
th ere ar seats are safer than children secured in
front seats. Forth is reason, Mercedes-Benz
stro ngly advises that you ins tall a child restra int
sy stem on a rear seat.
If it is absolutely necessary toins tall a child
re stra int sy stem on the front passenger seat,
alw ays obser vethe information on the automatic
front passenger air bag shutoff (
→page 39).
By doing this, you can avoidrisks caused by:
RAch ild restra int sy stem that is not de tected
by the automatic front passenger air bag
shutoff.
RThe unintentionally deactivated front
passenger air bag.
Occupant saf ety 51
Page 54 of 482

RIncorrect positioning of thech ild restra int
sy stem.
Fo rw ard-facing and rear wa rd-facing child
re stra int sy stems on the front passenger
seat
When using a rear wa rd-f acing child restra int sys‐
te m on the front passenger seat, the front
passenger air bag must alw ays be deactivated.
This is only the case if thePA SSENGER AIR BAG
OFF indicator lamp is lit continuously
(
→page 41).
When using a child restra int sy stem on the front
passenger seat, it is essential toobser vethefo l‐
lowing:
RMo vethe front passenger seat as far back as
possible.
RSet the seat backrest toan almost vertical
position.
RRe tract the seat cushion length as far as pos‐
sible.
RThe entire base of thech ild restra int sy stem
must alw aysre st on the seat cushion of the
front-passenger seat.
RThe backrest of thefo rw ard-facing child
re stra int sy stem must, as far as possible, be
re sting on the seat backrest of the front
passenger seat. The child restra int sy stem
must not touch thero of or be put under
st ra in by the head restra ints.
RIf necessar y,adjust the angle of the seat
backrest and the head restra int position
according ly.
RMo vethe seat cushion inclination tothe
highest, most vertical position.
RAlw ays make sure that the shoulder belt
st ra p is cor rectly routed f
romthe seat belt
outlet of theve hicle tothe shoulder belt
guide on thech ild restra int sy stem. The
shoulder belt stra p must be routed forw ards
and down wards from the seat belt outlet.
RIf necessar y,adjust the seat belt outlet and
th e front passenger seat accordingly.
RNe ver place objects, forex ample, a cushion,
under or behind thech ild restra int sy stem.
Alw ays comply with the manufacturer's ins talla‐
tion and operating instructions forth ech ild
re stra int sy stem used.
Child saf ety loc ks
Activating/deactivating the child saf ety lock
fo r the rear doors
&
WARNING Risk of accident and injury
due tochildren left unatte nded inthe
ve hicle
If yo u lea vechildren unaccompanied in the
ve hicle, they may be able toset theve hicle in
motion, forex ample by:
RRe leasing the parking brake.
RShifting the transmission out of park
position j.
RStarting the engine.
In addition, they may operate vehicle equip‐
ment.
#Ne ver lea vechildren and animals unat‐
te nded in theve hicle.
#When leaving theve hicle, alw aysta ke
th e SmartK eywith you and lock the
ve hicle.
52
Occupant saf ety
Page 55 of 482

&WARNING Risk offata l injury due to
ex posure toextreme heat or cold in the
ve hicle
If people – particularly children – ‑ are
ex posed toextreme heat or cold over an
ex tended pe riod of time, there is a risk of
injury or evenfa ta l injur y.
#Never lea veanyone – pa rticularly chil‐
dren – unatte nded intheve hicle.
&
WARNING Thereis arisk of accident
and injury if you lea vechildren unatte n‐
ded in theve hicle
If ch ildren are tra veling in theve hicle, they
could:
ROpen doo rs,th ereby endangering other
persons or road users.
RGet out of theve hicle and be hit by
oncoming traf fic.
ROpe rate ve hicle equipment and become
trapped, forex ample.
#Alw ays activate thech ild saf etyloc ks
av ailable if children are tra veling in the
ve hicle.
#Ne ver lea vechildren unatte nded inthe
ve hicle.
#When leaving theve hicle, alw aysta ke
th e SmartK eywith you and lock the
ve hicle.
Child saf etyloc ksare available forth ere ar doors
and forth ere ar side wind ows.
The child saf etyloc kon there ar doors secures
each door separatel y.The doors can no longer
be opened from the inside.
#Press the le ver in direction 1(acti vate)or
2 (deactivate).
#Make sure that thech ild saf etyloc ksare
wo rking properly.
Occupant saf ety 53
Page 56 of 482

Activating/deactivating the child saf ety lock
fo r the rear side windo ws
#Toactivate/deacti vate:press button 2.
Opening/closing there ar side wind owsis
possible:
RWi th indicator lamp 1lit: via the switch
on the driver's door.
RWi th indicator lamp 1off: via the switch
on the cor responding rear door or driv‐
er's door.
Pe ts in the vehicle
&
WARNING Risk of accident and injury
due toanimals left unsecured or unat‐
te nded in theve hicle
If yo u lea veanimals in theve hicle unatten‐
ded or unsecured, they could possib lypress
down buttons or switches.
Thereby an animal may:
Ractivate vehicle equipment and become
trapped, forex ample
Rswitch systems on or off and endanger
ot her road users
Uns ecured animals may be throw n around in
th eve hicle in theeve nt of an accident or
sudden steering and braking maneuver and
injure vehicle occupants in the process.
#Ne ver lea veanimals in theve hicle unat‐
te nded.
#Alw ays cor rectly secure animals while
driving, forex ample using a suitable
animal car rier.
54
Occupant saf ety