2018 MERCEDES-BENZ S-CLASS CABRIOLET BATTERY

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.
Opening and closing 63

#Toswitch on: slidethe switch toposition
2.
#To switch off: slidethe switch toposition
1.
% If an accident has been de tected, the trunk
unloc kseve n if separate lo cking is switched
on.
Un locking the trunk with the emer gency
re lease from inside
Re quirements:Rthe12 Vve hicle battery is connected and
ch arge d.
#Press emer gency release button 1brief ly.
The trunk lid unloc ksand opens.
Un locking the trunk lid using the mechanical
ke y
#Take the mechanical keyout of the SmartK ey
(→page 59).
#Press theto p of thest ar 1.
70
Opening and closing

ProblemPossible causes/consequences and MSolutions
If a side window is obstructed during closing and reopens again slightly:
#Immediately af terth e window bloc ks, pull the cor responding button again until the side window has
closed, and hold the button for an additional second.
The side window is closed with increased forc e.
If a side window is obstructed again during closing and reopens again slightly:
#Re peat the pr evious step.
The side window is closed without the automatic reve rsing function.
The side windo wscannot be opened or
closed using the con venience opening
fe ature. The SmartK
eybattery is dischar ged or nearly dischar ged.
#Check the battery using the battery check lamp and replace if necessary .
Opening and closing 75

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.
% Intheeve ntthe engine cannot bestar ted
(y et theve hicle ’sstar ter battery is charge d),
th e 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:
RWhen a door is opened
RWhen the trunk lid is opened
RWhen the hood is opened
The ATA sy stem is armed automatically af ter
appr oximately 10seconds:
RAfter locking theve hicle with the SmartK ey
RAfter 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
Opening and closing 79

Therefrigerator box reduces its cooling capacity
or switches off in thefo llowing cases:
Rto o many electrical consumers are turned on
Rth est ar ter battery is not suf ficiently charge d
If th is is the case, the indicator lamps flash in
th e button toswitch there frigerator box on and
off. The cooling function will au tomatically
switch back on as soon as there is suf ficient
vo ltage.
#Fo ld down there ar armrest.
#Pull handle 1and fold down co ver2.
#To open: pull handle 1and fold down the
co ver.
#To switch on: press button 2repeatedly
until an indicator lamp (low cooling) flashes
or two indicator lamps (high cooling) flash.
#To switch off: press button 2repeatedly
until bo thindicator lamps go out.
10 4
Seats and stowing

Exterior lighting
Lighting systems and your responsibility
The various lighting sy stems of theve hicle are
only aids. The driver of theve hicle is responsible
fo r cor rect vehicle illumination in accordance
with the pr evailing light and visibility conditions,
legal requirements and traf fic situation.
Light switch
Opera ting the light switch
1WLeft-hand standing lamps
2X Right-hand standing lamps
3T Parking lights and license plate lamp
4Ã Automatic driving lights (prefer red light
switch position)
5L Low beam/high beam
6RSwitches there ar fog lights on or off
When low beam is activated, theT indicator
lamp forth e parking lights is deactivated and
re placed bytheL low beam indicator lamp.
#Always park your vehicle safely and in a well-
lit area, in accordance with there leva nt le gal
st ipulations.
* NO
TEBattery discharging byoperating
th est anding lights
Operating thest anding lights over a period of
hours puts a stra in on the batter y.
#Where possible, switch on the
ri ght X or left Wparking light.
Inthe case of se vere battery discharging, the
parking lights or standing lamps are automati‐
cally switch ed offtofacilitate the next engine
st art.
The exterior lighting (e xcept parking lights and
st anding lamps) switch es off automatically when
th e driver's door is opened.
10 8
Light and visibility

Folding the outside mir rors in/out
#Brief lypress switch 1.
Re setting the outside mir rors
% Ifth e battery has been disconnected or com‐
ple tely discharged ,th e outside mir rors must
be reset. Only then will the automatic mir ror
fo lding function workproperly.
#Brief lypress switch 1. Ad
justing the outside mir rors
#Select there qu ired mir ror using button 3or
4.
#Use button 2toset the position of the mir‐
ro ryo u ha veselected.
Engaging the outside mir rors
#Press and hold button 1.
Yo uwill hear a click and the mir ror will audi‐
bly engage in position. The mir ror is set in
th e cor rect position.
Au tomatic anti-glare mir rorsfunction
&
WARNING Risk of burn s and poisoning
due tothe anti- glare mir ror electrolyte
Electrolyte may escape if theglass in an
automatic anti-glare mir ror breaks.
The electrolyte is harmful and causes ir rita ‐
tion. It must not come into contact wi thyour
skin, eyes,respiratory organs or clo thing or
be swallo wed.
#Ifyo u come into contact with electro‐
ly te , obser vethefo llowing:
RRinse the electrolyte from your skin
and seek medical attention immedi‐
atel y.
RIf electrolyte comes into contact
with your eyes, rinse them thor‐
oughly with clean water and seek
medical attention immediately.
RIf th e electrolyte is swallo wed,
immediately rinse your mouth out
th oroughly. Do not induce vomiting.
Seek medical attention immediately.
RImmediate lych ange out of clo thing
which has come into con tact wi th
electrolyte.
RIf an allergic reaction occurs, seek
medical attention immediatel y.
The insiderear-view mir ror and the outside mir‐
ro r on the driver's side automatically go into
anti- glare mode if light from a headlamp hits the
sensor on the inside rear-view mir ror.
Light and visibility 11
7

#Therefore,check regularly that there
are no flammable materials in the
engine compartment or on theex haust
sy stem.
Re quirements:RThe SmartK eyis located in theve hicle and
th e SmartK eybattery is not dischar ged.
#To switch on the po wer supp ly:press but‐
to n1 (USA) or 2(Canada) once.
Yo u can activate the windshield wipers, for
ex ample.
The po wer supp lyis switched off again if thefo l‐
lowing conditions are me t:
RYou open the driver's door.
RYo upr ess butto n1 (USA) or 2(Canada)
twice.
#To switch on the ignition: press button 1
(USA) or 2(Canada) twice.
The indicator lamps in the instrument clus ter
light up.
The ignition is switched off again if one of the
fo llowing conditions is me t:
RYou do not start theve hicle within
15 minutes.
The transmission is in position j.
or
The electric parking brake is applied.
RYo upr ess butto n1 (USA) or 2(Canada)
once.
St arting theve hicle
Starting theve hicle with thest art/s top but‐
to n
Requ irements:
RThe SmartK eyis located in theve hicle and
th e SmartK eybattery is not dischar ged.
#Shift the transmission toposition jori.
#Depress the brake pedal and press button
1 (USA) or 2(Canada) once.
#Ifth eve hicle does not star t:switch off non-
essential consumers and press button 1
(USA) or 2(Canada) once.
#Ifth eve hicle still does not start and the
Place the Key in the Marked Space See
Operator's Manual display message also
appears in the multifunction display: start
th eve hicle in emer gency operation mode.
Yo u can switchoff the engine while driving by
pressing button 1(USA) or 2(Canada) for
about thre e seconds. Be sure toobser vethe
saf etyno tes under "Driving tips".
Driving and parking 12
9