engine MERCEDES-BENZ S-CLASS CABRIOLET 2019 Owner's Guide

if
th ey come into contact wi thhot parts of
th e engine or exhaust sy stem. #
Therefore, check regularly that there
are no flammable materials in the
engine compartment or on theex haust
sy stem. Re
quirements:
R The SmartK eyis located in theve hicle and
th e SmartK eybattery is not dischar ged. #
Toswitch on the po wer supp ly:press but‐
to n1 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:
R you open the driver's door
R you press but ton1 twice. #
Toswitch on the ignition: press button 1
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:
R you do not start theve hicle within
15 minutes.
The transmission is in position 005D.
or
The electric parking brake is applied.
R you press but ton1 once. St
arting the vehicle St
arting the vehicle with thest art/s top but‐
ton
Requ irements:
R The SmartK eyis located in theve hicle and
th e SmartK eybattery is not dischar ged. #
Shift the transmission toposition 005Dor005C. Driving and parking
131

#
Dep ress the brake pedal and press button
1 once. #
Ifth eve hicle does not star t:switch off non-
essential consumers and press button 1
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 swit choff the engine while driving by
pressing button 1for about thre e seconds. Be
sure toobser vethe saf ety no tes under "Driving
tips".
St arting theve hicle in emer gency operation
mode
If th eve hicle does not start and thePlace the
Key in the Marked Space See Operator's Manual
display message appears in the multifunction
displa y,yo u can start theve hicle in emer gency
operation mode. #
Makesure that mar ked space 2is em pty. #
Remo veSmartK ey1 from the SmartK ey
ri ng. #
Place Sma rtKe y1 in mar ked space 2.
The vehicle will start af ter a short time.
If yo ure mo veSmartK ey1 from mar ked
space 2the engine continues running. For
fur ther vehicle starts ho wever,SmartK ey1
must be located in mar ked space 2during
th e entire journe y. #
Have SmartK ey1 checked at a qualified
specialist workshop. If
th eve hicle does not star t: #
Lea veSmartK ey1 in mar ked space 2. #
Depress the brake pedal and start theve hicle
using thest art/ stop button.
% You can also swit chon the po wer supp lyor
th e ignition with thest art/ stop button. St
arting theve hicle via Remo teOnline serv‐
ices Cooling or heating
theve hicle interior before
commencing your journey
% This function is not available in all countries.
If yo ustart theve hicle via your smartphone, the
pr ev iously selec ted air conditioning adjustment
is active.
Ensure thefo llowing before starting the engine:
R The legal stipulations in the area where your
ve hicle is par ked allow engine starting via
smartphone.
R It is safe tostart and runth e engine where
yo ur vehicle is par ked.
R The fuel tank is su fficiently filled. 13 2
Driving and pa rking

R
The star ter battery is suf ficiently charge d.
% You can also set thete mp erature with your
smartphone. In form ation on Mercedes me
connect and other services: http://
www.mercedes.me
This function is not available for all models.
Charging the bat tery before commencing
yo ur journey
% This function is not available in all countries.
R Ifth eve hicle battery is discharged, you
re cei vea message on your smartphone.
R You can then start theve hicle with the
smartphone tocharge the batter y.
R The vehicle is automatically switched off
af te rte n minu tes.
Ensure thefo llowing before starting the engine:
R The legal stipulations in the area where your
ve hicle is par ked allow engine starting via
smartphone.
R It is safe tostart and runth e engine where
yo ur vehicle is par ked.
R The fuel tank is su fficiently filled. St
arting theve hicle &
WARNING Risk of crushing or entrap‐
ment due tounin tentional starting of the
engine
Limbs could be crushed or trapped if the
engine is star ted unintentionally during
service or maintenance work. #
Alw ays secure the engine against unin‐
te ntional starting before car rying out
maintenance or repair work. Re
quirements:
R Park position 005Dis selected.
R The anti- theft alarm sy stem is not activated.
R The panic alarm is not activated.
R The hazard warning lights are switched off.
R The hood is closed.
R The doors are closed and loc ked.
R The windo wsand soft top are closed. #
Start theve hicle using the smartphone: R
Aftereve ryvehicle start, the engine runs for
te n minu tes.
R You can car ryout a maximum of two consec‐
utive starting attem pts. The vehicle must be
st ar ted once with the SmartK eybefore trying
to start theve hicle again with the smart‐
phone.
R You can stop theve hicle again at any time.
R Further information can be found in the
smartphone app.
Securing the engine against starting before
car rying out maintenance or repair work: #
Switch on the hazard warning lights.
or #
Unlock the doors.
or #
Open a side window or the soft top. Breaking-in no
tes Mercedes-AMG
vehicles: observeth e no tes in
th e Supplement. Otherwise, you may failto rec‐
ognize dangers. Driving and pa
rking 13 3

To
preser vethe engine during thefirst
10 00 mile s (1500 km):
R drive at varying road speeds and engine
speeds.
R drive theve hicle in drive program A
or ;.
R change gear before theta ch ome ter needle is
00C3 ofthewa yto there d area of theta ch ome‐
te r.
R do not shift down a gear manually in order to
brake.
R avoidoverstra ining theve hicle, e.g. driving at
full thro ttle.
R do not depress the accelera tor pedal past
th e pressure point (kickdown).
R only increase the engine speed gradually and
accelera tetheve hicle tofull speed af ter
10 00 miles (1500 km).
This also applies when the engine or parts of the
driv etra in ha vebeen replaced. Please also obser
vethefo llowing breaking-in
no tes:
R in cer tain driving and driving saf ety sy stems,
th e sensors adjust automatically while a cer‐
ta in dis tance is being driven af terth eve hicle
has been delivered or af terre pairs. Full sys‐
te m ef fectiveness is not reached until the
end of this teach-in process.
R brakepads, brake discs and tires that are
either new or ha vebeen replaced only ach‐
ie ve optimum braking ef fect and grip af ter
se veral hundred kilom eters of driving. Com‐
pensate forth ere duced braking ef fect by
applying greaterfo rc eto the brake pedal. Note
s on driving &
WARNING Risk of accident due to
objects in the driver's foot we ll
Objects in the driver's foot we ll may impede
pedal tra vel or block a depressed pedal.
This jeopardizes the operating and road
saf ety of theve hicle. #
Stow all objects in theve hicle securely
so that they cannot getinto the driver's
fo ot we ll. #
Alw ays ins tallth efloor mats securely
and as prescribed in order toensure
th at there is alw ays suf ficient room for
th e pedals. #
Do not use loose floor mats and do not
place floor mats on top of one ano ther. &
WARNING Risk of accident due to
unsuitable foot we ar
Operation of the pedals may be restricted
due tounsuitable foot we ar such as:
R Shoes with plat form soles
R Shoes with high heels
R Slippers #
When driving alw ayswe ar suitable
shoes in order tobe able tooperate the
pedals safel y. 134
Driving and pa rking

&
WARNING Risk of accident when switch‐
ing off the ignition when driving
If yo u swit choff the ignition while driving,
saf ety functions are restricted or no longer
av ailable. This may af fect the po werst eering
sy stem and the brake forc e boosting, for
ex ample.
Yo u will then need touse considerably more
fo rc eto steer and brake. #
Do not switch off the ignition while driv‐
ing. &
DANG ER Risk of fata l injuries due to
ex haust gases
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Inhaling
th ese exhaust gases is hazardous tohealth
and can lead topoisoning. #
Never lea vethe engine running in an
enclosed space wi thout suf ficient venti‐
lation. &
WARNING Risk of skidding and of an
accident due toshifting down on slippery
ro ad sur faces
If yo u shift down on slippery road sur faces to
inc rease the engine braking ef fect, the drive
wheels may lose traction. #
Do not shift down on slippery road sur‐
fa ces toinc rease the engine braking
ef fect. &
DANG ER Risk of fata l injury due topoi‐
sonous exhaust gases
If th eta ilpipe is bloc ked or suf ficient ventila‐
tion is not possible, poisonous exhaust gases
such as carbon monoxide may enter theve hi‐
cle. This is the case if theve hicle getsst uck
in sn ow,fo rex ample. #
Keep theta ilpipe and the area around
th eve hicle free from snow when the
engine or thest ationary heater are run‐
ning. #
Open a window on the windward side of
th eve hicle toensure an adequate sup‐
ply of fresh air. &
WARNING Risk of accident and inju ry
due tobeing under the influence of alco‐
hol and drugs while driving
Driving when under the influence of alcohol
and/or drugs is an extreme lydangerous
combination. Even small quantities of alcohol
or drugs may af fect your reflexe s, perception
and judgment.
The probability of a serious or even fata l acci‐
dent greatly inc reases if you drive when
under the influence of alcohol or drugs. #
Do not drink alcohol or take drugs while
driving, and do not allow an yone to
drive who has been drinking alcohol or
ta king drugs. Driving and pa
rking 13 5

&
WARNING Risk of accident due tothe
brake sy stem overheating
If yo u lea veyour foot on the brake pedal
when driving, the brake sy stem may over‐
heat.
This increases the braking dis tance and the
brake sy stem may evenfa il. #
Never use the brake pedal as a foot re st. #
Do not depress the brake pedal and the
accelerator pedal at the same time
while driving. *
NO
TEWearing out the brake linings by
continuously dep ressing the brake pedal #
Do not depress the brake pedal contin‐
uously whilst driving. #
Touse the braking ef fect of the engine,
shift toa lo werge ar in good time. *
NO
TEDama getothe driv etra in and
engine when pulling away #
Do not warm upthe engine while the
ve hicle is stationar y.Pull away immedi‐
atel y. #
Avoid high engine speeds and driving at
full thro ttle until the engine has reached
its operating temp erature. *
NO
TEDama getothe catalytic con verter
due tonon-combu sted fuel The engine is not
running smo othly and is
misfiring.
Non-combus ted fuel may get into the cata‐
lytic con verter. #
Only depress the accelera tor pedal
slightl y. #
Have the cause rectified immediately at
a qu alified specialist workshop. Limited braking ef
fect on salt-trea tedro ads:
R Due tosalt build-up on the brake discs and
brakepads, the braking dis tance can increase
conside rably or result in braking only on one
side
R Maintain a much greater safe dis tance tothe
ve hicle in front
To preve nt salt build-up:
R Brake occasionally while paying attention to
th e tra ffic conditions
R Carefully depress the brake pedal at the end
of the journey and when starting the next
journey ECO
start/s top function Ope
ration of the ECO start/s top function
Mercedes -AMG vehicles: observeth e no tes in
th e Supplement. Otherwise, you may failto rec‐
ognize dangers. 13 6
Driving and pa rking

The engine is automatically switched off if
the
fo llowing conditions are me t:
R you brake theve hicle toast andstill in trans‐
mission position 005Bor005C.
R if all vehicle conditions for an auto matic
engine stop are met.
The 00D6 symbol appears in the multifunction
display when theve hicle is stationar y.
The engine is restar ted automatically if:
R youre lease the brake pedal in transmission
position 005Bwhen the HOLD function is not
active.
R you shift from transmission position 005D.
R you en gage transmission position 005Bor005E.
R you depress the accelera tor pedal.
R youch ange theve hicle le vel.
R you open or close the soft top.
R an automatic engine start is necessar y.
If th e engine was switched off bythe ECO start/
st op function and you lea vetheve hicle, a warn‐
ing tone sounds. The Vehicle Operational Switch the Ignition Off Before Exiting
displaymessa ge
also appears in the multifunction displa y.Ifyou
do not switch off the ignition, the ignition is
automatically switched off af ter one minute.
Deactivating or activating the ECO start/
sto p function #
Press button 1.
If indicator la mp2lights up, the ECO start/
st op function is activated. ECO display function
The ECO display summarizes
the driving charac‐
te rist ics from thest art of the journey toits com‐
pletion and assists you in achieving the most
economical driving style.
Yo u can influence consum ption if you:
R drive with particular care
R drive theve hicle in drive program ;
R obser vethege arshift recommendations Driving and pa
rking 137

The inner segment lights up green and
the outer
segment fills up:
R 1 Moderate acceleration
R 2 Gentle decele ration and rolling
R 3 Consis tent speed
The inner segment is gr ayand the outer seg‐
ment em pties:
R 1 Sporty acceleration
R 2 Heavy braking
R 3 Fluctuations in speed
Yo u ha vedriven economically when:
R theth re e outer segments are comple tely fil‐
led simultaneously
R the ECO display border lights up
The additional range achi eved as a result of your
driving style in comparison with a driver with a
ve ry sporty driving style is shown under Bonus
fr. Start . Therange displ ayed does not indicate a
fi xe dre duction in consum ption. DY
NA MIC SELECT switch Fu
nction of theDY NA MIC SELECT switch Mercedes-AMG
vehicles: observeth e no tes in
th e Supplement. Otherwise, you may failto rec‐
ognize dangers.
Use theDY NA MIC SELECT switch tochange
between thefo llowing drive programs:
R = (Individual): individual settings
R B (Sport Plus): particularly sporty driving
st yle
R C (Sport): sporty driving style
R A (Comfort): comfortable and economi‐
cal driving style
Depending on the drive program selected, the
fo llowing vehicle characteristics will change:
R Drive sy stem:
- Engine and transmission management
- Active Dis tance Assi stDISTRONIC
R ESP ®
R Suspension R
Steering Selecting
the drive prog ram #
Press DYNA MIC SELECT switch 1forw ards
or backwards.
The drive prog ram selected appears in the
multifunction displa y.13 8
Driving and pa rking

Configuring drive prog
ram I Multimedia sy
stem:
, Vehicle .
e DYNAMIC
SELECT .
Individual #
Select the individual setting. Switching
the operation feedba ckfor drive
prog ram on/o ff Multimedia sy
stem:
, Vehicle .
e DYNAMIC SELECT #
Switch Notification for User on0073 or off 0053.
When this function is active, a cor responding
message is shown in the media display when
a drive prog ram is selected with the
DY NA MIC SELECT switch. Displaying
vehicle data Multimedia sy
stem:
, Vehicle .
e DYNAMIC SELECT #
Select Vehicle Data.
The vehicle data is displa yed. Displaying engine data
Multimedia sy
stem:
, Vehicle .
e DYNAMIC SELECT #
Select Engine Data.
% The values for engine output and engine tor‐
qu e may deviate from the nominal values.
Items that can influence this are, forex am‐
ple:
R Sea le vel
R Fuel grade
R Outside temp erature Au
tomatic transmission DIRECT SELECT le
ver Fu
nction of the DIRECT SELECT le ver &
WARNING Risk of accident and inju ry
due tochildren left unat tended in the
ve hicle
If ch ildren are left unat tended in theve hicle,
th ey could:
R open doo rs,th ereby endangering other
persons or road users.
R get out of theve hicle and be hit by
oncoming traf fic.
R ope rate ve hicle equipment and become
trapped, forex ample.
In addition, children could also set theve hi‐
cle in motion, forex ample, by:
R releasing the parking brake.
R shifting the automatic transmission out of
park position 005D.
R starting the engine Driving and parking
13 9

#
Never 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. #
Keep the SmartK eyout of there ach of
ch ildren. &
WARNING Risk of accident due toincor‐
re ct gearshifting
If th e engine speed is higher than the idle
speed and you en gage the transmission posi‐
tion 005Bor005E, theve hicle may accelerate
sharply. #
Ifyo u en gage the transmission position
005B or005E always depress the brake
pedal firm lyand do not accelerate at
th e same time. Use
the DIRECT SELECT le verto shift the trans‐
mission position. The cur rent transmission posi‐
tion is displ ayed in the multifunction displa y. 005D
Park position
005E Reversege ar
005C Neut ral
005B Drive position En
gaging reve rsege ar R #
Depress the brake pedal and push the
DIRECT SELECT le ver upwards past thefirst
point of resis tance.
The transmission position displ aysho ws005E
in the multifunction displa y.
Engaging neut ral N #
Depress the brake pedal and push the
DIRECT SELECT le ver up or down tothefirst
point of resis tance.
The transmission position displ aysho ws005C
in the multifunction displa y.
Subsequently releasing the brake pedal will
allow youto mo vetheve hicle freel y,e.g. topush
it or tow it away.
If yo uwa ntthe automatic transmission to
re main in neutral N even if the ignition is
switched off: #
Start theve hicle. #
Depress the brake pedal and engage neutral
005C. #
Release the brake pedal. #
Switch the ignition off. 14 0
Driving and pa rking