2018 MERCEDES-BENZ S-CLASS SEDAN ignition

Restra int sy stem functionality
When the ignition is switched on, a sy stem self-
te st is per form ed, during which the6
re stra int sy stem warning lamp lights up. It goes
out no later than a few seconds af terth eve hicle
is star ted. The components of there stra int sys‐
te m are then functional.
Malfunctioning restra int sy stem
A malfunction has occur red in there stra int sys‐
te m if:
RThe 6 restra int sy stem warning lamp
does not light up when the ignition is
switched on.
RThe 6 restra int sy stem warning lamp
lights up continuously or repeatedly during a
journe y.
&
WARNING Risk of injury orfata l injury
due toa malfunction in there stra int sys‐
te m
If th ere stra int sy stem is malfunctioning,
re stra int sy stem components may be trig‐
ge red unintentionally or might not be trig‐
ge red at all in theeve nt of an accident. This
may af fect the Emer gency Tensioning Device
or airbag, forex ample.
#Ha ve there stra int sy stem checked and
re paired immediately at a qualified spe‐
cialist workshop.
Fu nction of there stra int sy stem in an acci‐
dent
How there stra int sy stem works is de term ined by
th e se verity of the impact de tected and the type
of accident anticipated:
RFr ontal impact
RRe ar impact
RSide impact
RRo llover The activation
thre sholds forth e components of
th ere stra int sy stem are de term ined based on
th eev aluation of the sensor values measured at
va rious points in theve hicle. This process is pre-
em ptive in nature. The triggering/deployment of
th e components of there stra int sy stem should
ta ke place in good time at thest art of the colli‐
sion.
Fa ctors whi chcan only be seen and measure d
af te r a collision has occur red cann otplay a deci‐
sive role in air bag deployment, nor do they pro‐
vide an indication of air bag deployment.
The vehicle may be deformed significantly with‐
out an air bag being deplo yed. This is the case if
only parts which are relatively easily deformed
are af fected and thera te ofvehicle deceleration
is not high. Con versely, an air bag may be
deplo yedev en though theve hicle suf fers only
minor deformation. If very rigid vehicle parts
such as longitudinal members are hit, forex am‐
ple, theve hicle deceleration may be high enough
fo rth is to happen.
32
Occupant saf ety

PASSENGER AIR BAG indicator lamp
System self-te st
When the ignition is switched on, a sy stem self-
te st is per form ed during which the two
PA SSENGER AIR BAG ON and OFF indicator
lamps light up simultaneousl y.The
status of the front passenger air bag is dis‐
pla yed af terth e sy stem self-tes t:
RPASSENGER AIR BAG ON lights up for
60 seconds, subsequently bo thPASSENGER
AIR BAG ON and OFF indicator lamps are off:
th e front passenger air bag is able todeploy
in theeve nt of an accident.
RPASSENGER AIR BAG OFF lights up continu‐
ously: the front passenger air bag is deactiva‐
te d. It will then not be deplo yed in theeve nt
of an accident.
If th ePA SSENGER AIR BAG ON indicator lamp is
off, only thePA SSENGER AIR BAG OFF indicator
lamp sho wsthest atus of the front passenger air
bag. The PASSENGER AIR BAG OFF indicator
lamp may be lit continuously or be off.
If th ePA SSENGER AIR BAG OFF indicator lamp
and the6 restra int sy stem warning lamp
light up simultaneousl y,the front passenger seat
may not be used. Also in this case, do not ins tall
a ch ild restra int sy stem on the front passenger
seat. Ha vethe automatic front passenger air bag
shutoff checked and repaired immediately at a
qu alified specialist workshop. St
atus display
If th e front passenger seat is occupied, ensure,
bo th before and durin
g
the journe y,that thest a‐
tus of the front passenger air bag is cor rect for
th e pr evailing situation.
Af ter in stalling a rear wa rd-facing child
re stra int sy stem on the front passenger
seat: PASSENGER AIR BAG OFF must be lit con‐
tinuousl y.
&
WARNING Risk of injury or death from
using a rear wa rd-facing child restra int
sy stem when the front passenger air bag
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 air bag
can deploy in theev ent of an accident.
The child could be stru ck bythe air bag.
Alw ays ensure that the front passenger air
bag is disabled. The PASSENGER AIR BAG
OFF indicator lamp must be lit.
Occupant saf ety 43

Activating/deactivating the acoustic lo cking
ve rification signal
Multimedia sy stem:
,9HKLFOH.î 9HKLFOH 6HW
WLQJV.$FRXVWLF /RFN
#Ac tivate Oor deacti vate ª the function.
Arming/deactivating the panic ala rm
Requirements:RThe ignition is switched off.
#To arm: press button 1for app roxima tely
one second .
A visu al and audible alarm is triggered.
#Todeactivate: briefly press but ton1 again.
or
#Press thest art/ stop button on the cockpit
(the SmartK eyis inside theve hicle).
Changing the unlocking settings
Po ssible unlocking functions of the SmartK ey:
RCentral unlo cking
RUn locking the driver's door and fuel filler flap
#To switch between settings: pressthe
% and& buttons simultaneously for
appr oximately six seconds until the battery
ch eck lamp flashes twice.
If th e unlocking function forth e driver's door
and fuel filler flap has been selecte d:
RPressingthe% button a second time cen‐
trally unloc kstheve hicle.
RVe hicles with KEYLESS-GO: Ifyo uto uch
th e inner sur face of the door handle on the driver's door, only
the driver's door and fuel
fi ller flap are unlo cked.
Re ducing the energy consu mption of the
SmartK ey
Allvehicles: ifyo u do not use theve hicle or a
SmartK eyfor an extended pe riod of time, you
can reduce the energy consum ption of the
re spective SmartK ey.To do so, deactivate the
SmartK eyfunctions.
#To deactivate: pressthe& button on the
SmartK eytwice in rapid succession.
The battery check lamp of the SmartK ey
fl ashes twice brief lyand lights up once.
#To activate: press any button on the Smart‐
Ke y.
% When theve hicle is star ted with the Smart‐
Ke yin thestow age compartment of the cen‐
te r console, the SmartK eyfunctions are
au tomatical lyactivated (
→page 167).
Ve hicles with KEYLESS-GO: Automatic deacti‐
va tion of the SmartK eyfunctions occurs af ter a
fe w minutes if the SmartK eyis not mo vedth us
Opening and closing 59

Ifyo u open the trunk lid from outside, the trunk
lid is automatically unloc ked.
Problems with KEYLESS-GO
Problem
Possible causes/consequences and MSolutions
Yo u can no longe r lock or unlock the
ve hicle using KEYLESS-GO. Po
ssible causes:
RThe SmartK eybattery is dischar ged or nearly dischar ged.
RThere is inter fere nce from a po werful radio signal source.
RThe SmartK eyis defective.
#Check the battery using the battery check lamp and replace if necessary .
#Use the mechanical keyto lock or unlock theve hicle .
#Ha ve theve hicle and SmartK eychecked at a qualified specialist workshop.
Switching the automatic locking feature
on/off
The vehicle is loc ked automatically when the
ignition is switched on and the wheels are turn‐
ing fast erthan walking pace.
64
Opening and closing

Operating MAGIC SKY CONTROL
Operatingthe front and rear elements from
th e front
#Press button 1.
If th ere ar element is in a dif fere nt state to
th e front element: the transparency of the
front element changes.
If bo thelements are in the same state: the
transpa rency of bo thelements changes.
% When you switch offthe po wer supply, bo th
elements dar ken au tomatically.
When you switch onthe po wer supply or the
ignition, bo thelements return tothest ate
th ey werein before the po wer supply was
switched off. Operating
there ar element from there ar
passenger co mpartment
#Ifth ero ller sunblind is fully closed: pull but‐
to n1.
The roller sunblind is opened. The transpar‐
ency of there ar element then changes.
82
Opening and closing

Anti-theft protection
Fu nction of the immobilizer
The immobilizer pr events your vehicle from being
st ar ted without the cor rect 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 theve hicle, alw aysta ke the Smart‐
Ke ywit hyo u and lock theve hicle. An yone can
st art the engine if a valid SmartK eyhas been left
inside theve hicle.
% Ifth eeve ntthat the engine cannot bestar‐
te d (y ettheve hicle's battery is charge d), the
sy stem is not operational. Contact an
authorized Mercedes-Benz Center or call
1-800-FO R-MERCedes (in the USA) or
1-800-387-0 100 (in Canada).
ATA (anti-theft alarm system)
Fu nction of theATA system (anti-theft ala rm
sy stem)
If th eATA system is armed, a visual and audible
alarm is triggered in thefo llowing situations:
RA door is opened.
RThe trunk lid is opened.
RThe hood is opened.
The ATA sy stem is armed automatically af ter
appr oximately 10seconds:
RAfter locking theve hicle with the SmartK ey.
RAf ter locking theve hicle using KEYLESS-GO.
When theATA system is armed, indicator lamp
1 flashes.
The ATA sy stem is automatically deactivated:
RAf ter unlocking theve hicle with the Smart‐
Ke y.
RAfter pressing thest art/ stop button with the
SmartK eyinside theve hicle.
86
Opening and closing

Seats
Adjusting the front seat electrically
&
WARNING Risk of becoming trapped if
th e seats are adjus tedby children
Children could become trapped if they adjust
th e seats, particularly when unattended.
#When leaving theve hicle, alw aysta ke
th e SmartK eywith you and lock the
ve hicle.
#Ne ver lea vechildren unatte nded inthe
ve hicle.
The seats can be adjus ted when the ignition is
switched off.
& WARNING Risk of becoming trapped
when adjusting the seats
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the
seat guide rail.
#Make sure when adjusting a seat that
no one has any body parts in the sweep
of the seat.
Obser vethe saf etyno tes on "Air bags" and "Chil‐
dren in theve hicle".
&
WARNING Risk of injury from adjusting
th eve hicle settings while theve hicle is in
motion
Yo u could lose cont rol of theve hicle in the
fo llowing situations:
Rifyo u adjust the driver's seat, the head
re stra int, thesteering wheel or the mir ror
while theve hicle is in motion
Rifyo ufa sten your seat belt while theve hi‐
cle is in motion
#Before starting the engine: adjust the
driver's seat, the head restra int, the
st eering wheel or the mir ror and fasten
yo ur seat belt.
&
WARNING Risk of becoming trapped if
th e seat height is adjus ted carelessly
If yo u adjust the seat height carelessly, you
or other vehicle occupants could be trapped
and thereby injured.
Children in particular could accidenta lly
press the electrical seat adjustment buttons
and become trapped.
#While moving the seats, make sure that
hands or other body parts do not get
under the le ver assembly of the seat
adjustment sy stem.
&
WARNING Risk of injury duetohead
re stra ints which are not ins talled or are
adjus ted incor rectly
If head restra ints are not ins talled or are
adjus ted incor rectly, the head restra ints can‐
not pr ovide pr otection as intended.
There is an increased risk of injury in the
head and neck area, e.g. in theeve nt of an
accident or when braking.
Seats and stowing 89

#Press and hold button1until the head
re stra int has extended or retracted.
Fo lding the center head restra int into posi‐
tion mechanically
#Pull the head restra int up until it engages.
Configuring seat adju stment
Re quirements:RThe ignition is switched on. Multimedia sy
stem:
,9HKLFOH.a 6HDWV
#Select 'ULYHU
V 6HDW or3DVVHQJHU 6HDW .
Ad justing the backrest side bols ters
#Select 6LGH %ROVWHUV .
#Selectthe setting.
Ad justing the seat contour in the lumbar
re gion of the seat backrest
#Select /XPEDU.
#Adjust the air cushion.
Setting the shoulder section
#Select 6KRXOGHUV.
#Selectthe settings.
Setting seat heating balance
#Select 6HDW +HDWLQJ %DODQFH.
#Selectthe settings. Memory function
#Sa
ve the seat adjustments with the memory
function (→page 113).
Se tting automatic adjustment of the lateral
suppo rt(active multicontour seat)
Multimedia sy stem:
,9HKLFOH.a 6HDWV
Wi th th is function, the lateral support of the
active multicontour seat is automatically adjus‐
te dto the driving and cornering dynamics of the
ve hicle.
#Select 'ULYHU
V 6HDW or3DVVHQJHU 6HDW.
#Select '\QDPLF 6HDW.
#Select setting: 2II,/HYHO  or/HYHO .
Seats and stowing 10
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