MERCEDES-BENZ S CLASS 2018 Workshop Manual

an accident may th en not be able to per fo rm
th eir intended pr ot ective function.
The ch ild cannot be re st ra ined in th e eve nt of
an accident, heavy braking or a sudden
ch ange of direction.

Ac tivating/deactivating the ch ild seat saf et y
fe ature of th e seat belt
q
WA RNING Risk of inju ry or death if a
seat belt is unfas te ned while th e ve hicle
is in motion
If th e seat belt is re leased while th e ve hicle is
in motion, th e ch ild re st ra int sy st em is no
longer cor re ctly secu re d. The ch ild seat
saf et y fe ature is deactivated and th e seat
belt is dr aw n in a bit by th e inertia re el.
It is th erefore not possible to engage th e seat
belt again.

When ins ta lling a ch ild re st ra int sy st em, be sure
to obser ve th e manufacturer's ins ta llation
instructions and th e instructions fo r cor re ct use
of th e ch ild re st ra int sy st em.
ISOFIX is a st andardized securing sy st em fo r
specially designed re st ra int sy st ems. LA TC H-
type (ISOFIX) ch ild re st ra int sy st ems are
appr ove d in accordance with ECE R44.
Only ch ild re st ra int sy st ems th at ha ve been
appr ove d in accordance with ECE R44 may be
attached to LA TC H-type (ISOFIX) mounting
brac ke ts.
Symbol fo r ins ta lling a LA TC H-type (ISOFIX)
ch ild re st ra int sy st em Installing LA TC H-type (ISOFIX) ch ild seat
securing sy st ems
q
WA RNING Risk of inju ry or fa ta l injury if
th e ch ild secured we ighs more th an th e
permissible we ight fo r th e LA TC H-type
(ISOFIX) ch ild re st ra int sy st em
LA TC H-type (ISOFIX) ch ild re st ra int sy st ems
do not of fe r suf fi cient pr ot ection fo r ch ildren
we ighing more th an 65 lbs (29 kg ) to ge th er
with th e ch ild re st ra int sy st em, who are
secured using th e seat belt integrated in th e
ch ild re st ra int sy st em. Fo r ex ample, th e ch ild
may not be re st ra ined cor re ctly in th e eve nt
of an accident.

When ins ta lling a ch ild re st ra int sy st em, be sure
to obser ve th e manufacturer's ins ta llation
instructions and th e instructions fo r cor re ct use
of th e ch ild re st ra int sy st em.
Before ev ery trip, make sure th at th e LA TC H-type
(ISOFIX) ch ild re st ra int sy st em is engaged cor‐
re ctly in bo th LA TC H-type (ISOFIX) mounting
brac ke ts. u NO TE Dama ge to th e seat belt fo r th e
center seat
When ins ta lling a ch ild re st ra int sy st em, th e
seat belt fo r th e center seat could be dam‐
aged.

If it is absolutely necessary to ins ta ll a ch ild
re st ra int sy st em on th e front passenger seat,
alw ay s obser ve th e information on th e automatic
front passenger air bag shutoff ( →
page 41 ).
By doing th is, yo u can avo id ri sks caused by :R
A ch ild re st ra int sy st em th at is not de te cted
by th e automatic front passenger air bag
shutoff. R
An unintentionally deactivated front
passenger air bag. R
Incor re ct positioning of th e ch ild re st ra int
sy st em.
Fo rw ard-facing and re ar wa rd -facing ch ild
re st ra int sy st ems on th e front passenger
seat
When using a re ar wa rd-f acing ch ild re st ra int sys‐
te m on th e front passenger seat, th e front
passenger air bag must alw ay s be deactivated.
This is only th e case if th e PA SSENGER AIR BA G
OFF indicator lamp is lit continuously
( →
page 43). When using th e ch ild re st ra int sy st em on th e
front passenger seat, it is essential to obser ve
th e fo llowing: R
Mo ve th e front passenger seat as fa r back as
possible. R
Set th e seat backrest to an almost ve rt ical
position. R
Re tract th e seat cushion length as fa r as pos‐
sible. R
The entire base of th e ch ild re st ra int sy st em
must alw ay s re st on th e seat cushion of th e
front-passenger seat. R
The backrest of th e fo rw ard-facing ch ild
re st ra int sy st em must , as fa r as possible, be
re st ing on th e seat backrest of th e front
passenger seat. The ch ild re st ra int sy st em
must not to uch th e ro of or be put under
st ra in by th e head re st ra ints.R
If necessar y, adjust th e angle of th e seat
backrest and th e head re st ra int position
according ly . R
Ad just th e seat cushion inclination so th at
th e front edge of th e seat cushion is in th e highest position and th e re ar edge of th e
seat cushion is in th e lo west position. R
Alw ay s make sure th at th e shoulder belt
st ra p is cor re ctly ro uted from th e seat belt
outlet of th e ve hicle to th e shoulder belt
guide on th e ch ild re st ra int sy st em. The
shoulder belt st ra p must be ro uted fo rw ards
and down wa rd s from th e seat belt outlet. R
If necessar y, adjust th e seat belt outlet and
th e front passenger seat accordingly. R
Ne ve r place objects under or behind th e
ch ild re st ra int sy st em, e.g. cushions.
Alw ay s comply with th e manufacturer's ins ta lla‐
tion and operating instructions fo r th e ch ild
re st ra int sy st em used.54
Occupant saf et y

Child saf et y loc ks
Ac tivating/deactivating the ch ild saf et y lock
fo r the re ar doors
q
WA RNING Risk of accident and inju ry
due to ch ildren left unat te nded in th e
ve hicle
If yo u lea ve ch ildren unaccompanied in th e
ve hicle, th ey may be able to set th e ve hicle in
motion, fo r ex ample by :R
Re leasing th e parking brake.R
Shifting th e transmission out of park
position ] .R
St arting th e engine.
In addition, th ey may operate ve hicle equip‐
ment.

Thereby an animal may: R
activate ve hicle equipment and become
trapped, fo r ex ampleR
swit ch sy st ems on or off and endanger
ot her ro ad users
Uns ecured animals may be th row n around in
th e ve hicle in th e eve nt of an accident or
sudden st eering and braking maneuver and
injure ve hicle occupants in th e process.

SmartK ey
Overview of SmartK ey functions
q
WA RNING Risk of accident and inju ry
due to ch ildren left unat te nded in th e
ve hicle
If ch ildren are left unat te nded in th e ve hicle,
th ey could:R
Open doo rs , th ereby endangering ot her
persons or ro ad usersR
Get out of th e ve hicle and be hit by
oncoming traf fi cR
Operate ve hicle equipment
In addition, th e ch ildren could also set th e
ve hicle in motion, fo r ex ample, by :R
Re leasing th e parking brakeR
Shifting th e transmission out of park
position ]R
St arting th e engine.