2018 MERCEDES-BENZ S-CLASS CABRIOLET Owner's Manual

#Route TopTe ther belt 4under head
re stra int 1 between the two head restra int
bars.
#Hook TopTe ther hook 5ofTopTe ther belt
4 without twisting into TopTe ther anchor‐
age 3.
#Tension TopTe ther belt 4. 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,slide head restra int 1 down‐
wa rds (→page 86). Make sure that youdo
not inter fere with the cor rect routing of Top
Te ther belt 4.
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
th e 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 front airbag shutoff
(
→page 43).
By doing this, you can avoidrisks caused by:
RAch ild restra int sy stem that is not de tected
by the automatic front passenger front airbag
shutoff.
RThe unintentionally deactivated front
passenger airbag.
RIncor rect positioning of thech ild restra int
sy stem.
Note s onforw ard-facing and rear wa rd-facing
ch ild restra int sy stems on the front
passenger seat
When using a rear wa rd-facing child restra int sys‐
te m on the front passenger seat, the front
passenger front airbag must alw ays be deactiva‐
te d. This is only the case if thePA SSENGER AIR
BA G OFF indicator lamp is lit continuously
(
→page 45).
When using thech ild restra int sy stem on the
front passenger seat, it is essential toobser ve
th efo llo wing:
RMo
vethe front-passen ger seat as far back as
possible and also into the highest position.
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.
Occupant saf ety 55

RThe backrest ofthefo 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.
RAd just the seat cushion inclination so that
th e front edge of the seat cushion is in the
highest position and there ar edge of the
seat cushion is in the lo west position.
RAlways make sure that the shoulder belt
st ra p is cor rectly routed from the 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 under or behind the
ch ild restra int sy stem, e.g. cushions. Alw
ays comply with the manufacturer's ins talla‐
tion and operating instructions forth ech ild
re stra int sy stem used.
Note s on pets in theve hicle
&
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 possibly press
down buttons or switches.
There byan 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.
56
Occupant saf ety

SmartKey
Overview of SmartK eyfunctions
&
WARNING Risk of accident and injury
due tochildren left unatte nded inthe
ve hicle
If ch ildren are left unatte nded intheve hicle,
th ey could:
Ropen doo rs,th ereby endangering other
persons or road users.
Rge t out of theve hicle and be hit by
oncoming traf fic.
Rope rate ve hicle equipment and become
trapped, forex ample.
In addition, children could also set theve hi‐
cle in motion, forex ample, by:
Rreleasing the parking brake.
Rshifting the automatic transmission out of
park position j.
Rstarting the engine.
#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.
#Ke ep the SmartK eyout of there ach of
ch ildren.
* NO
TEDama getotheke ycaused by
magnetic fields
#Ke ep theke yaw ay from strong mag‐
netic fields.
1Loc ks
2Battery check lamp
3Unloc ks
4Opens/closes the trunk lid
5Pa nic alarm
The Smart Keyloc ksand unlo cksth efo llowing
components:
RDoo rs
RTrunk lid
RFu elfiller flap
Opening and closing 57

Ifyo udo not open theve hicle within appr ox‐
imately 40 seconds af ter unlocking:
Rth eve hicle is loc ked again
Ranti- theft pr otection is reactivated
Do not keep the SmartK eytoge ther with elec‐
tronic devices or me talobjects. This can af fect
th e SmartK ey's functionality.
% If battery check lamp 2does not light up
af te r pressing the% or& button, the
battery is dischar ged.
Ac tivating/deactivating the acoustic lo cking
ve rification signal
Multimedia sy stem:
,Vehicle.î Vehicle Set-
tings.Acoustic Lock
#Ac tivate Oor deacti vate ª the function.
Ac tivating/deactivating the panic alarm
Re quirements
% The panic alarm function is only available in
cer tain countries.
RThe ignition is switched off.
#To activate: press button 1for app rox‐
ima tely one second.
A visual and audible alarm is triggered.
#To deactivate: briefly press but ton1 again.
or
#Press thest art/ stop button on the dash‐
board (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 udo not use theve hicle or a
SmartK eyfor an extended pe riod of time, you
can reduce the energy consum ption of the
58
Opening and closing

respective SmartK ey.To do so, deactivate the
SmartK eyfunctions.
#To deactivate: pressthe& button on the
SmartK eytwice in quick 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, theke yfunction sar eautomati ‐
cal lyactivated (
→page 130).
Re moving/inserting the eme rgency key
#To remo ve:press release knob 1.
Emer gency key2 is pushed out slight ly.
#Pull out emer gency key2 until it en gage s in
th e intermediate position.
% You can use the intermediate position of
emer gency key2 toattach theke yto ake y
ri ng.
#Press release knob 1again and fully
re mo veemer gency key2.
#To inser t:press release knob 1.
#Insert emer gency key2 tothe intermediate
position or fully until it engages.
Re placing the SmartK eybattery
&
DANG ER Serious damage tohealth
caused byswallowing batteries
Batteries contain toxic and cor rosive sub‐
st ances. Swallowing batte ries may cause
serious damage tohealth.
There is a risk of fata l injur y.
#Keep batteries out of there ach of chil‐
dren.
#If batteries are swallo wed, seek medical
attention immediately.
+ENVIRONMEN TALNO TEEnvironmental
damage causedbyimproper disposal of
batteries
Bat teries conta in pollutants. It is
illegal todispose of them with the household
ru bbish.
#
Dispose of batteries in an
environmen tally responsible manner.
Ta ke dischar ged batteries toaqu alified
specialist workshop or toa collection
point for used batteries.
Opening and closing 59

Requirements:RYourequ ire a CR 2032 3 V cell batter y.
Mercedes-Benz recommends that you ha vethe
battery replaced at a qualified specialist work‐
shop.
#Re mo vethe mechanical key (→pag e59) .
#Press release button 2down fully and
re mo vecover1.
#Re mo vebattery compartment 3and take
out the dischar ged batter y.
#Insertthe new battery into battery compart‐
ment 3. Obser vethe positive pole marking
in the battery compartment and on the bat‐
te ry.
#Push in battery compartment 3.
#Replace co ver1 sothat it engages.
Problems with the SmartK ey
Problem
Possible causes/consequences and MSolutions
Yo u can no longe r lock or unlock the
ve hicle. Po
ssible causes are:
RThe SmartK eybattery is dischar ged or nearly dischar ged.
RThere is inter fere nce from a po werful radio signal source.
60
Opening and closing

ProblemPossible causes/consequences and MSolutions
RThe SmartKeyis defective.
#Check the battery using the battery check lamp and replace if necessar y.
#Usethe mechanical keyto lock or unloc k.
#Have the SmartK eychecked at a qualified specialist workshop.
Yo u ha velost a SmartK ey.
#Ha ve the SmartK eydeactivated at a qualified specialist workshop.
#If necessar y,ha ve the loc kschanged as well.
Doors
Un locking and opening doors from the inside
#Pull door handle 2.
Locking pin 1pops up when the door is
unloc ked.
Locking the doors from the inside
#Take the SmartK eywith you when exiting the
ve hicle and close the driver's door.
#Press down locking knob 1onthe driver's
door from the front passenger seat.
Opening and closing 61

#Exittheve hicle and press down the locking
knob on the front passenger door.
#Close the front passenger door.
Locking/unlocking theve hicle centrally from
th e inside
#To unlock :press button 1.
#Tolock: press button 2.
This does not lock or unlock the fuel filler flap.
The vehicle is not unloc ked:
RIfyo u ha veloc kedth eve hicle using the
SmartK ey.
RIfyo u ha veloc kedth eve hicle using KEY‐
LESS-GO.
Locking and unlocking theve hicle with KEY‐
LESS-GO
Requ irements:RThe SmartK eyis outside theve hicle.
RThe dis tance between the SmartK eyand the
ve hicle does not exceed 3 ft(1 m).
RThe driver's door and the door at which the
door handle is used are closed.
#To unlock theve hicle: touch the inner sur‐
fa ce of the door handle.
#To lock theve hicle: touch sensor sur face
1 or2.
#Co nvenience closing: touch recessed sen‐
sor surf ace2for an extended pe riod.
% For fur ther information on con venience clos‐
ing (
→pa ge 74).
62
Opening and closing