2019 MERCEDES-BENZ S-CLASS CABRIOLET ignition

Opening
&
WARNING Risk of inju ryfrom using the
windshield wipers while the engine hood
is open
When the engine hood is open and the wind‐
shield wipers are set in motion, you can be
trapped bythe wiper linkage. #
Alw ays switch off the windshield wipers
and ignition before opening the engine
hood. #
Release retaining clips 1.
Pull co ver2 up. #
Remo veany existing moisture from the fuse
box using a dry clo th. #
Loosen scr ews4, and remo vefuse box lid
3 from theto p.
Closing #
Check whe ther the seal is positioned cor‐
re ctly in lid 3. 374
Breakdown assis tance

The sy
stem checks the tire pressure and the tire
te mp erature of the tires ins talled on theve hicle
by means of a tire pressu resensor.
New tire pressure sensors, e.g. in winter tires,
are automatically taught-in during thefirs t jour‐
ney they are used.
If th ere is a subs tantial pressure loss or if the
tire temp erature is excessive, you will be warned
in thefo llowing ways:
R via display messa ges (→ page 450)
R viathe0077 warning lamp in the instrument
clus ter (→ page 474)
The tire pressu remonitoring sy stem is only an
aid. It is the driver's responsibility toset the tire
pressure tothere commended cold tire pressure
suitable forth e operating situation. Set the tire
pressure for cold tires using a tire pressu re
ga uge. Notethat the cor rect tire pressure forthe
cur rent operating situation mu stfirs t be taught-
in to the tire pressure monitoring sy stem.
In most cases, the tire pressure monitoring sys‐
te m will auto maticallyupdate the new refere nce
va lues af teryo u ha vechanged the tire pressure.
Yo u can, ho wever,also update there fere nce val‐ ues
byrestarting the tire pressure monitoring
sy stem manually (→ page 383).
Sy stem limitations
The sy stem may be impaired or may not function
in thefo llowing situations:
R Ifth e tire pressure is set incor rectly
R Ifth ere is a sudden pressure loss caused, for
ex ample, byafo re ign object penetrating the
tire
R Ifth ere is a malfunction caused byano ther
ra dio signal source
Make sure toobser vethefo llowing fur ther rela‐
te d subjec t:
R Notes on tire pressure (→ page377)
Che cking the tire pressure with the tire pres‐
sure moni toring sy stem
Requ irements:
R The ignition is switched on. On-board computer:
, Service .
Tires
One of thefo llowing displa ysappears:
R Cur rent tire pressure of ea chwheel:
R Tire pressure will be displayed after driving a
few minutes
R Tire Pressure Monitor Active: thete ach-in
process of the sy stem is not yet comple te.
The tire pressure are already being moni‐
to re d. #
Compare the tire pressure with there com‐
mended tire pressure forth e cur rent operat‐
ing condition (→ page 379). Obser vethe
no tes on tire temp erature (→ page377).
% The values displa yed in the multifunction dis‐
play may deviate from those of the tire pres‐
sure gauge as they referto sea le vel.At high
altitudes, the tire pressure value indicated by
a pressure gauge are higher than those
shown bythe on-board computer. In this
case, do not reduce the tire pressure. 382
Wheels and tires

Operating
fluids Note
s on operating fluids Mercedes-AMG
vehicles: observeth e no tes in
th e Supplement. Otherwise, you may failto rec‐
ognize dangers. &
WARNING Risk of inju ryfrom operating
fl uids harmful to your health
Operating fluids may be poisonous and harm‐
ful to yo ur health. #
Obser vethete xt on the original con‐
ta iners when using, storing or disposing
of operating fluids. #
Alw aysst ore operating fluids sealed in
th eir original conta iners.#
Alw ayske ep children away from operat‐
ing fluids. &
WARNING Risk offire or explosion from
fuel
Fu els are highly flammable. #
Fire, open flames, smoking and creation
of spar ksmust be avoided. #
Swit choff the ignition and, if available,
th est ationary heater, before and while
re fueling theve hicle. &
WARNING Risk of inju ryfrom fuels
Fu els are poisonous and hazardous to your
health. #
Do not swallow fuel or let it come into
contact with skin, eyes or clo thing. #
Do not inhale fuel vapor. #
Keep children away from fuel. #
Keep doors and windo wsclosed du ring
th ere fueling process.
If yo u or other people come into contact with
fuel, obser vethefo llowing: #
Immediately rinse fuel off your skin with
soap and water. #
If fuel comes into contact with your
ey es, immediately rinse them thor‐ oughly with clean
water.Seek medical
attention immediately. #
Ifyo u swallow fuel, seek medical atten‐
tion immediatel y.Do not induce vomit‐
ing. #
Change immediately out of clo thing that
has come into con tact wi thfuel. +
ENVIRONMENTAL
NOTEEnvironmental
pollution caused byenvironmen tally ir re‐
sponsible disposal #
Dispose of operating fluids in an envi‐
ro nmentally responsible manner. Operating
fluids include thefo llowing:
R Fuels
R Lubricants
R Coolant
R Brake fluid
R Windshield washer fluid
R Climate cont rol sy stem refrigerant 41 0
Tech nical da ta

Only use products appr
ovedby Mercedes-Benz.
Yo u can identify operating fluids appr ovedby
Mercedes-Benz bythefo llowing insc ript ions on
th e conta iner:
R MB- Freigabe (e.g. MB-Fr eigabe 229.51 )
R MB-Appr oval (e.g. MB-App rova l 229.51)
Fu rther information on appr oved operating flu‐
ids:
R inthe Mercedes-Benz Specifications for
Operating Fluids at http://be vo.mercedes-
benz.co m (by en tering the designation)
R inthe Mercedes-Benz Specifications for
Operating Fluids in the Mercedes-Benz BeVo
app (by entering the designation)
R at a qualified specialist workshop Fu
el Note
s on fuel grades forve hicles with a gas‐
oline engine
Obser vethe no tes on operating fluids
(→ page 410). *
NO
TEDama gecaused bythe wrong fuel Even small amounts of
the wrong fuel could
re sult in damage tothe fuel sy stem, the
engine and the emission control sy stem. #
Only refuel with lo w-sulfur unleaded
fuel.
This fuel may contain up to10%ethanol by
vo lume. Your vehicle is suitable for use with
E10 fuel.
Ne verre fuel with one of thefo llowing fuels:
R Diesel
R Gasoline with more than 10%ethanol by
vo lume, e.g. E15, E85, E100
R Gasoline with more than 3% me thanol by
vo lume, e.g. M15, M30, M85, M100
R Gasoline with additives con taining me tal
If yo u ha veacciden tally refueled with the
wrong fuel: #
Do not swit chon the ignition. #
Consult a qualified specialist workshop. If
th eav ailable fuel is not suf ficiently low in sul‐
fur, this can produce unpleasant odors.
Only refuel with fuel, that has at least the octane
number specified in the instruction label in the
fuel filler flap (→ page143).
If yo uwa nt maximum engine output: only
re fuel with unleaded premium grade gasoline
with at least 91AKI/95 RON.
As a temp orary measure, if there commended
fuel is not available, you may also use unleaded
re gular gasoline with an octane number of at
least 87AKI/91 RON.
* NO
TEPremature wearthro ugh unleaded
re gular gasoline Unleaded
regular gasoline can cause the
engine towe ar more quickly and impair lon‐
ge vity and per form ance.
If unleaded premium grade gasoline is
una vailable and you ha vetorefuel using
unleaded regular gasoline with 87AKI/
91 RON: Te
ch nical da ta411

Saf
ety sy stems Display messages
Possible causes/consequences and 0050
0050Solutions
00E5 Currently Unavailable See
Operator's Manual *
ESP ®
is temp orarily una vailable.
Other driving sy stems and driving saf ety sy stems may also malfunction. &
WARNING Risk of skidding if ESP ®
is malfunctioning
If ESP ®
is malfunctioning, ESP ®
cannot car ryout vehicle stabilization. In addition, other driving saf ety sy stems
are switched off. #
Drive on carefull y. #
Have ESP ®
ch ecked at a qualified specialist workshop. #
Carefully drive on a suitable stre tch of road, making slight steering mo vements at a speed abo ve19 mph
(30 km/h). #
Ifth e display message does not disappear, consult a qualified specialist workshop immediately. Drive carefully.
0049 (USA only)
0024 *
The red0049 (USA only) or 0024indicator lamp (Canada only) is lit.
Yo u ha veattem ptedto release the electric parking brake with the ignition switched off. #
Switch the ignition on. Display messages and
warning/indicator lamps 419

Display messages
Possible causes/consequences and 0050
0050Solutions
(Canada only)
Turn On the Ignition to
Release the Parking Brake
0049
(USA only)
0024 (Canada only)
Parking Brake See Opera-
tor's Manual *
The yellow 0024 indicator lamp is lit. The elect ric pa rking brake is malfunctioning.
To appl y: #
Switch off the ignition and switch it back on. #
Apply the electric parking brake manually (→ page153).
If it is not possible toapply the electric parking brake: #
Visit a qualified specialist workshop. #
Where necessar y,also safeguard the par kedve hicle against rolling away.
The yellow 0024 andthere d 0049 (USA only) or 0024(Canada only) indicator lamps are lit. The elect ric pa rking
brake is malfunctioning.
To release: #
Swit choff the ignition and switch it back on. #
Release the electric parking brake manually (→ page153).
or #
Release the electric parking brake automatically (→ page152).
If it is still not possible torelease the electric parking brake: #
Do not continue driving under any circums tances. Consult a qualified specialist workshop. 420
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions
The yellow 0024 indicator lamp is lit and there d0049 (USA only) or 0024(Canada only) indicator lamp is flashing.
The electric parking brake is malfunctioning.
The electric parking brake could not be applied or released. #
Swit choff the ignition and switch it back on.
To appl y: #
Release and then apply the electric parking brake manually (→ page153).
To release: #
Apply and then release the electric parking brake manuall y.
If th e electric parking brake cann otbe applied or there d0049 (USA only) or 0024(Canada only) indicator lamp
continues toflash: #
Do not continue driving under any circum stances. Consult a qualified specialist workshop. #
Where necessar y,also safeguard the par kedve hicle against rolling away.
The yellow 0024 indicator lamp is on and there d0049 indicator lamp (USA only) or the0024 indicator lamp (Can‐
ada only) flashes for appro ximately ten seconds af terth e electric parking brake has been applied or released. It
th en remains lit or goes out. The electric parking brake is malfunctioning.
If th e bat tery charge leve l is too lo w: #
Char gethe batter y.
To appl y: Displ
aymessa ges and warning/indicator lamps 421

Display messages
Possible causes/consequences and 0050
0050Solutions #
Switch off the ignition.
The electric parking brake is applied automaticall y.
If th e electric parking brake should not be applied, e.g. when washing theve hicle in an automatic car wash or when
having theve hicle towe d, lea vethe ignition switched on. This does not include having theve hicle towe d with the
re ar axle raised.
If th e electric parking brake is not applied automatically: #
Switch off the ignition and switch it back on. #
Release and then apply the electric parking brake manually (→ page153).
If it is still not possible toapply the electric parking brake: #
Visit a qualified specialist workshop. #
Where necessar y,also safeguard the par kedve hicle against rolling away.
To release: #
Ifth e conditions for auto matic release are fulfilled and the electric parking brake is not released automaticall y,
re lease the electric parking brake manually (→ page153).
If it is still not possible torelease the electric parking brake: #
Do not continue driving under any circums tances. Consult a qualified specialist workshop. 422
Display messages and warning/indicator lamps