lock MERCEDES-BENZ S CLASS 2018 Owners Manual

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.

Locking/unlocking th e ve hicle centrally from
th e inside

If yo u open th e trunk lid from outside, th e trunk
lid is automatically unloc ke d.
Problems with KEYLESS-GO
Problem
Po ssible causes/consequences and P Solutions
Yo u can no lon ge r lock or unlock th e
ve hicle using KEYLESS-GO. Po ssible causes: R
The SmartK ey battery is dischar ge d or nearly dischar ge d.R
There is inter fe re nce from a po we rf ul ra dio signal source.R
The SmartK ey is defective.

R
Press th e closing or locking button
on th e trunk lid.R
Pull th e trunk lid handle.
HANDS-FREE AC CESS function Wi th HANDS-FREE AC CESS yo u can open, close
or inter ru pt trunk lid mo ve ment by per fo rm ing a
kicking mo ve ment under th e re ar bumper.
The kicking mo ve ment triggers th e opening or
closing process alternately.
Obser ve th e no te s when opening ( →
page 66)
and closing ( →
page 67 ) th e trunk lid.

R
The kicking mo ve ment must be to wa rd s th e
ve hicle and bac k.
1
Sensor de te ction ra nge
If se ve ra l consecutive kicking mo ve ments are
not successful, wa it te n seconds.
Sy st em limitations
The sy st em may be impaired or may not function
if: R
Snow or dirt, e.g. from ro ad salt, co ve rs th e
sensor area. R
The kicking mo ve ment is made using a pros‐
th et ic leg. The trunk lid could be opened or closed unin te n‐
tional ly , in th e fo llowing situations: R
If a person's arms or legs are moving in th e
sensor de te ction ra nge, e.g. when polishing
th e ve hicle, sitting on th e edge of th e trunk,
or picking up objects. R
If objects are mo ve d or placed behind th e
ve hicle, e.g. ch arging cables, te nsioning
st ra ps or luggage. R
When wo rk ing on th e trailer coupling, trailers
or re ar bicycle ra ck s.
Deactivate KEYLESS-GO ( →
page 59) or do not
car ry th e SmartK ey about yo ur person in such
situations.
Swit ch ing separate trunk locking on/off
If yo u centrally unlo ck th e ve hicle while separate
locking is activated, th e trunk re mains loc ke d.

Un locking th e trunk with th e emer ge ncy
re lease from inside
Re qu irements:R
th e 12 V ve hicle battery is connected and
ch ar ge d.

Anti-theft pr ot ection
Fu nction of th e immobilizer
The immobilizer pr eve nts yo ur ve hicle from being
st ar te d without th e cor re ct SmartK ey .
The immobilizer is automatically activated when
th e ignition is switched off and deactivated when
th e ignition is switched on.
When leaving th e ve hicle, alw ay s ta ke th e Smart‐
Ke y wit h yo u and lock th e ve hicle. An yo ne can
st art th e engine if a va lid SmartK ey has been left
inside th e ve hicle.

R
Af te r unlocking th e ve hicle using KEYLESS-
GO.

Fu nctions of ABS (anti-lock braking sy st em)
ABS re gulates th e brake pressure in critical driv‐
ing situations: R
During braking, e.g. at maximum full-s to p
braking or insuf fi cient traction of th e tires,
th e wheels are pr ev ented from blocking.R
Ve hicle st eerability while braking is ensured.
If ABS inter ve nes when braking, yo u will fe el a
pulsing in th e brake pedal. The pulsating brake
pedal can be an indication of hazardous ro ad
conditions and can ser ve as a re minder to ta ke
ex tra care while driving.
Sy st em limitations R
ABS is active from speeds of appr ox . 5 mp h
(8 km/h). R
ABS may be impaired or may not function if a
malfunction has occur re d and th e ye l‐
low % ABS wa rn ing lamp lights up contin‐
uously in th e instrument clus te r af te r th e
engine is st ar te d. Fu nction of BA S (Brake Assist Sy st em)
q
WA RNING Risk of an accident caused by
a malfunction in BA S (Brake Assi st Sys‐
te m)
If BA S is malfunctioning, th e braking dis ta nce
in an emergency braking situation is
increased.

Saf et y sy st ems
Wa rn ing/indicator lamp
Po ssible causes/consequences and P Solutions
' Brake wa rn ing lamp (USA)
M Brakes wa rn ing lamp (Can‐
ada) The re d brake sy st em wa rn ing lamp is lit while th e engine is ru nning.
Po ssible causes are: R
The brake fo rc e boosting is malfunctioning and th e braking ch aracteristics may be af fe cted.R
The re is not enough brake fl uid in th e brake fl uid re ser vo ir.
q
WA RNING The re is a ri sk of an accident if brake fo rc e boosting is malfunctioning
If brake fo rc e boosting is malfunctioning, th e wheels may lock when braking. Braking ch aracteristics may be
impaired. The braking dis ta nce in an eme rg ency braking situation can increase.