engine MERCEDES-BENZ S-CLASS CABRIOLET 2019 Repair Manual

Fo
rto wing, use a tow rope or tow bar with bo th
axles on the ground. Do not use tow bar sy stems
(→ page 208). *
NO
TEDama getotheve hicle due to tow‐
ing away incor rectly #
Obser vethe instructions and no tes on
to wing away. To
wing with a raised axle: towing should be
per form ed byato wing compan y.
Pe rm itted towing me thods Ve
hicle equipment/ towing
me thod Bo
th axles on thegr ound Fr
ont axle raised Re
ar axle raised
Ve hicles with automatic transmis‐
sion Ye
s, maximum 31miles (50 km) at
31 mp h (50 km/h) No
Yes, if thesteering wheel is fixe d in
th e center position with a steering
wheel lock To
wing theve hicle with bo thaxles on the
gr ound #
Obser vethe no tes on the permitted towing
me thods (→ page 367). #
Make sure that the battery is connected and
ch arge d. When
the battery is dischar ged, thefo llowing
actions cannot be per form ed:
R the engine cann otbe star ted
R the electric parking brake cann otbe released
or applied R
the automatic transmission cann otbe shif ted
to position 005Cor005D 368
Breakdown assis tance

R
The vehicle is secured at all four
wheels with suitable tensioning
st ra ps
R The maximum permissible speed of
35mph (6 0 km/h) is not exceeded
when transporting *
NO
TEDama getotheve hicle from secur‐
ing it incor rectly #
After loading, theve hicle must be
secured on all four wheels. Otherwise,
th eve hicle could be damaged. #
A minimum dis tance of 4 in (10 cm)
up wa rds and 8 in (20 cm) down wards
must be kept tothe transport platform. Tr
ansport le vel is not available forth efo llowing
ve hicles:
R Mercedes-AMG vehicles
R Vehicles with MAGIC BODY CONTROL %
Depending on the model, button 1is loca‐
te d in the control panel between thesteering
wheel and the driver's door. #
Toactivate transpo rtleve l:press button
1.
Indicator lamp 2lights up.
The vehicle is raised by1.2 in (30 mm) com‐
pared tothe normal le vel. #
Press button 1again and hold it for at least
fi ve seconds.
The vehicle is raised from thera ised le velto
th e transport le vel.
The transport le vel is reached when indicator
lamp 2flashes and theMax. Speed 22mph
display message appears in the multifunction
displa y.
The vehicle is lo wered again in thefo llowing sit‐
uations:
R When driving fasterthan 22 mph (35 km/h).
R After selecting a drive program using the
DY NA MIC SELECT switch.
The vehicle is then adjus tedto the height of
th e last active drive program. #
Secure theve hicle on all four wheels af ter
loading. #
Todeactivate transpo rtleve l:start the
engine when theve hicle is at a standstill.
If transpo rtleve l is activated, indicator lamp
2 flashes. Breakdown assis
tance 371

#
Press and hold button 1for at least five
seconds.
The vehicle is adjus tedto the height of the
last active drive prog ram. Indicator lamp 2
goes out. #
Drive theve hicle off the transpor ter. To
wing eyesto rage location To
wing eye1 is located with theve hicle tool kit
under the trunk floor. Installing
theto wing eye #
Press the mark on co ver1 inwa rds and
re mo ve. #
Screw intheto wing eyeclockwise as far as it
will go and tighten.
% Make sure that co ver1 engages in the
bumper when youre mo vetheto wing eye. *
NO
TEDama gedue toincor rect use of
th eto wing eye When a
towing eye is used toreco ver a vehi‐
cle, theve hicle may be damaged in the proc‐
ess. #
Only use theto wing eyeto to waw ay or
to w start theve hicle. To
w- starting theve hicle (eme rgency engine
st art) *
NO
TEDama getothe automatic trans‐
mission due to towstarting The automatic transmission may be damaged
in the process of tow starting vehicles with
automatic transmission. #
Vehicles with automatic transmission
must not be tow star ted. #
Vehicles with automatic transmission must
not be tow- star ted. 372
Breakdown assis tance

Electrical fuses
Note
s on electrical fuses &
WARNING Risk of accident and inju ry
due to ov erloaded lines
If yo u manipulate or bridge a faulty fuse or if
yo ure place it with a fuse with a higher
amperage, the electric line could be overloa‐
ded.
This could result in a fire. #
Alw aysre place faulty fuses with speci‐
fi ed new fuses conta iningthe cor rect
amperage. *
NO
TEDama gecaused byincor rect fuses Incor
rect fuses may cause damage toelectri‐
cal components or sy stems. #
Only use Mercedes-Benz appr oved
fuses with the cor rect fuse rating. Blown fuses mu
stbe replaced with fuses of the
same rating, which you can recognize bythe
color and fuse rating. The fuse ratings and fur‐ th
er information tobe obser ved are lis ted in the
fuse assignment diagram.
* NO
TEDama geor malfunctions caused
by moisture Moisture may cause dama
getothe electrical
sy stem or cause it tomalfunction. #
When the fuse box is open, make sure
th at no moisture can enter the fuse
box. #
When closing the fuse box, make sure
th at the seal of the lid is positioned cor‐
re ctly on the fuse box. If
th e newly inser ted fuse also blo ws, ha vethe
cause traced and rectified at a qualified special‐
ist workshop, e.g. an authorized Mercedes-Benz
Center.
Ensure thefo llowing before replacing a fuse:
R The vehicle is secured against rolling away
R All electrical consumers are switched off
R The ignition is switched off The electrical fuses are located in
thefo llowing
fuse bo xes:
R Fuse box in the engine compartment on the
driver's side (→ page373)
R Fuse box on the driver's side of the cockpit
(→ page 375)
R Fuse box in the front passenger foot we ll
(→ page 375) Opening an
d closing the fuse box in the
engine co mpartment Requ
irements:
R Obser vethe no tes on electrical fuses
(→ page 373).
R Have thefo llowing tools readily available:
- a dry clo th
- a sc rewdriver Breakdown assis
tance 373

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

Setting up
thefo lding chock Prepa
ring theve hicle for a wheel change Re
quirements:
R The requ ired tire-change tool is available. If
yo ur vehicle is not equipped with the tire-
ch ange tool kit, consult a qualified specialist
wo rkshop tofind out about suitable tools. R
The vehicle is not on a slope.
R The vehicle is on solid, non-slippery and le vel
ground. #
Apply the electric parking brake manually. #
Movethe front wheels tothest ra ight-ahead
position. #
Vehicles with automatic transmission:
Shift into position 005D. #
Vehicles with le vel control sy stem: Setthe
normal vehicle le vel (→ page 180). #
Switch off the engine. #
Make sure that the engine cann otbe star ted. #
Place choc ks orother suitable items under
th e front and rear of the wheel that is diago‐
nally opposite the wheel you wish tochange. #
Remo vethe hub caps if necessary
(→ page 400). #
Raise theve hicle (→ page 401). Re
moving and in stalling hub caps Re
quirements:
R The vehicle is prepared for a wheel change
(→ page 400).
Pla stic hub cap #
Toremo ve:turn the center co ver of the hub
cap counter-clockwise and remo vethe hub
cap. #
Toinstall: make sure that the center co ver of
th e hub cap is turned counter-clockwise. #
Position the hub cap and turn the center
co ver clockwise until the hub cap engages
ph ysically and audibly. 400
Wheels and tires

Aluminum hub cap
#
Toremo ve:position soc ket2 on hub cap
1.
% The soc ket can be found in the tire-change
to ol kit. #
Position wheel wrench 3on soc ket2. #
Using wheel wrench 3, turn hub cap1
counter-clo ckwise and remo veit. #
Toinstall: position hub cap 1and turn until
it is comple tely flush with the wheel. #
Position soc ket2 on hub cap 1. #
Attach wheel wrench 3tosoc ket2 and
tighten the hub cap clockwise.
Specified tightening torq ue: 18lb-ft
(25 Nm). Ra
ising theve hicle when changing a wheel Re
quirements:
R There are no persons in theve hicle.
R The vehicle has been prepared for a wheel
ch ange (→ page 400).
R The hub caps ha vebeen remo ved
( → page 400).
Impor tant no tes on using the jack:
R Use only theve hicle-specific jack that has
been tested and appr ovedby Mercedes-Benz
to raise theve hicle.
R The jack is only designed forra ising and
holding theve hicle for a short time while a
wheel is being changed and not for mainte‐
nance workunder theve hicle. R
The jack must be placed on a firm ,fl at and
non-slip sur face. If necessar y,use a lar ge,
fl at, load-bearing, non-slip unde rlay.
R The foot ofthe jack must be positioned verti‐
cally under the jack support point. Ru
les of conduct when theve hicle is raised:
R Never place your hands or feet under the
ve hicle.
R Never lie under theve hicle.
R Do not start the engine and do not release
th e electric parking brake.
R Do not open or close any doors or the trunk
lid. Wheels and tires
401

There are no
restrictions when positioning the
antenna on the outside of theve hicle for some
wav ebands.
This applies tothefo llowing wavebands:
R Trunked radio sy stem/T etra
R 70 cm waveband
R 2G/3G/4G Ve
hicle identification plate, VIN and engine
number overview
Ve hicle identification plate Ve
hicle identification plate (USA only)
1 Perm issible grossweight
2 Perm issible front axle load
3 Perm issible rear axle load
4 Paint code
5 VIN (vehicle identification number) 408
Tech nical da ta

Ve
hicle identification plate (Canada only)
1 Perm issible grossweight
2 Perm issible front axle load
3 Perm issible rear axle load
4 Paint code
5 VIN (vehicle identification number)
The permissible gross vehicle weight is made up
of theve hicle weight, all vehicle occupants, the
fuel and the load. The maximum gross axle
we ight rating is the maximum weight that can be
car ried on one axle (front or rear axle). Ne
verexc eed the permissible gross vehicle
we ight or the maximum gross axle weight rating
fo rth e front or rear axle.
VIN in front of the front seat 1
VIN (vehicle identification number) Ad
ditional plates 1
Platewith information about emissions test‐
ing, including con firm ation of emissions
guidelines at theU. S. federal le vel as well as
fo r California
2 VIN (vehicle identification number)
3 Engine number (s tamp ed into the crankcase) Te
ch nical da ta409

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