engine MERCEDES-BENZ E-CLASS CABRIOLET 2021 Workshop Manual

N
N
o
ot
tes on t
es on t ec
echnical data
hnical data
* NO
NOTE
TEMercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. The
tech nical data was de term ined in accordance
with EU Directives. The data stated only applies to
ve hicles with standard equipment. You can obtain
fur ther information from a Mercedes-Benz Service
Centre.
Onl Onl y f
y for cert
or cert ain countr
ain countr ies:
ies:you can /n dvehicle-
speci/c vehicle data in theCO C documents (CER-
TIFIC ATE OF CONFORMITY). These documents
are deli vered with your vehicle. On-boar
On-boar
d electr
d electronics
onics N
No
ot
tes on t
es on t am
amper
per ing wit
ing wit h t
h t he engine electr
he engine electr onics
onics *
N
NOOTE
TE Prematu rewe arthro ugh improper
maintenance Improper maintenance may cause
vehicle
components towe ar more quickly and the
ve hicle's operating permit may be in validated. #
Always ha veworkon the engine elec-
tronics and related components car ried
out at a quali/ed specialist workshop. T
T
w
w o-wa
o-wa y r
y radios
adios N
No
ot
tes on
es on /tting
/tting tw
two-wa
o-wa y r
y radios
adios &
W
WARNING
ARNING Risk of accident due to
improper workon two-w ayradios
If two-w ayradios are manipulated or retro/t-
ted incor rectl y,the electromagnetic radiation
from the two-w ayradios can inter fere with the
ve hicle elect ronics and jeopardise the operat-
ing saf ety of theve hicle. #
You should ha veall workon electrical
and electronic components car ried out
at a quali/ed specialist workshop. &
W
WARNING
ARNING Risk of accident due to
improper operation of two-w ayradios
If yo u use two-w ayradios in theve hicle
improper ly,th eir electromagnetic radiation
can disrupt theve hicle's elect ronics. This is
th e case in thefo llowing situations, in particu-
lar:
R The two-w ayradio is not connected toan
ex terior aerial.
R The exterior aerial is /tted incor rectly or is
not a lo w-re0ection aerial.
This could jeopardise the operating saf ety of
th eve hicle. #
Have the lo w-re0ection exterior aerial /t-
ted at a quali/ed specialist workshop. #
When operating two-w ayradios in the
ve hicle, alw ays connect them tothe lo w-
re 0ection exterior aerial. Te
ch nical data
353
353

V
V
ehicle
ehicle identi/cation
identi/cation plat
plate, VIN and engine num-
e, VIN and engine num-
ber ov
ber overerview
view
V
V ehicle
ehicle identi/cation
identi/cation plate
plate Ve
hicle identi/cation plate (e xample:Kuwa it)
1 Vehicle manu facturer
2 Place of manufacture
3 Manu facturing date
4 Vehicle model
5 VIN Ve
hicle identi/cation plate (e xample: all other
countries)
1 Vehicle manu facturer
2 EUgeneral ope rating permit number (only for
cer tain countries)
3 VIN (vehicle identi/cation number)
4 Maximum permissible gross vehicle weight
(kg) 356
356
Te
ch nical data

5
Maximum permissible gross weight of vehicle
combination (kg) (only for speci/c countries)
6 Maximum permissible front axle load (kg)
7 Maximum permissible rear axle load (kg)
8 Paint code
% The data shown in the illust ration is example
data. VIN belo
VIN belo
w t
w the fr
he fr ont r
ont r ight-hand seat
ight-hand seat 1
Imprinted VIN (vehicle identi/cation number)
2 Floor co vering VIN at t
VIN at t
he low
he lower edg
er edge of t
e of the windscr
he windscr een
een 1
VIN (vehicle identi/cation number) as label
The VIN as a label at the lo wer edge of the wind-
screen is only available in some countries.
Engine number
Engine number
The engine number is stamped into the crank-
case. Further information can be obtained at a
qu ali/ed specialist workshop. Te
ch nical data
357 357

&
W
W ARNI NG
ARNI NGRisk of injury from fuels
Fu els are poisonous and hazardous toyour
health. #
Do not swallow fuel or let it come into
contact with skin, eyes or clo thing. #
Do not inhale fuel vapour. #
Keep children away from fuel. #
Keep doors and windo wsclosed during
th ere fuelling process.
If yo u or other people come into contact with
fuel, obser vethefo llowing: #
Immediate lyrinse fuel o. your skin with
soap and water. #
If fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical at tention
immedia tely. #
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 contact with fuel. Flexible-fuel
vehicles can be refuelled wi th thefo l-
lowing fuel types:
R unleaded petrol
R E85 fuel
R a mixture of E85 fuel and unleaded petrol
Flexible-fuel vehicles can be identi/ed bythe
Et
Et hanol up t
hanol up t o E85
o E85sticker on the inside of the fuel
/ller 0ap.
Depending on the countr y,the fuels you can use
in your vehicle may di.er from the information in
th e Owner's Manual. The fuels that ha vebeen
appr ovedfo ryo ur vehicle can be found on the
inst ruction label on the inside of the fuel /ller 0ap. F F
uel
uel Inf
Inf
or
ormation on fuel q
mation on fuel q uality f
uality for v
or vehicles wit
ehicles wit h a pe
h a pet-
t-
r
r ol engine
ol engine
Obser vethe no tes on operating 0uids
(/ page 358). *
N
NOOTE
TE Damage caused bythe wrong fuel Even small amounts of
the wrong fuel could
re sult in damage tothe fuel system, the
engine and the emission control system. #
Only refuel using unleaded, sulphu r-free
petrol that conforms toEuropean
EN 228, or an equivalent speci/cation.
Fu el of this speci/cation may contain up to
10% ethanol byvolume. Your vehicle is suita-
ble for use with E10 fuel.
Ne verre fuel wi thone of thefo llowing fuels:
R diesel
R regular petrol with an octane number
lo we rth an 91 RON
R petrol with more than 10% ethanol byvol-
ume, e.g. E15, E20, E85, E100
R petrol with more than 3% me thanol byvol-
ume, e.g. M15, M30
R petrol with additives containing me tal Te
ch nical data
359
359

If
yo u ha veacciden tally refuelled wi th the
wrong fuel: #
do not switch the ignition on. #
consult a quali/ed specialist workshop. The
following compatibility indications for fuel
apply toyour vehicle: 1
For petrol with maximum 5% ethanol byvol-
ume
2 For petrol with maximum 10% ethanol byvol-
ume Ac
cording toEuropean standard EN 16942 you
can /nd the compatibility indications at thefo l-
lowing locations:
R Ontheve hicle on the information label on the
fuel /ller 0ap (/ page 171)
R Onthe fuel dispenser or pump nozzle suitable
fo ryo ur vehicle thro ughout Europe
If th eav ailable fuel is not su1ciently low in sul-
phur, this can produce unpleasant odours.
The recommended octane number foryo ur vehi-
cle can be found on the information label in the
fuel /ller 0ap (/ page 171).
E 350, E 450 4MA
E 350, E 450 4MA TIC:
TIC: only refuel using super
unleaded petrol wi that least 98 RON if you wish
to achie vemaximum engine output. Alternativel y,
yo u can also refuel using premium-g rade unlea-
ded petrol with at least 95 RON.
All models: All models: as atemp orary measure, if there com-
mended fuel is not available, you may also refuel
wi th regular unleaded petrol with an octane num-
ber of at least 91 RON.This may reduce engine
output and increase fuel consumption.
Ne verre fuel using petrol wi tha lo werRO N. Fu
rther information on fuel can be obtained at a
/lling station or a quali/ed specialist workshop.
Inf
Inf or
ormation on additiv
mation on additiv es in pe
es in petr
trol
ol
Obser vethe no tes on operating 0uids
(/ page 358).
* NO
NOTE
TEDamage from use of unsuitable
additives Even small amounts of
the wrong additive may
lead tomalfunctions occur ring. #
Only add cleaning additives recommen-
ded byMercedes-Benz tothe fuel. Mercedes-Benz
recommends that you use brand-
name fuels with additives.
In some countries, the fuel available may not ha ve
su1cient additives. Residue could build up in the
fuel injection system as a result. In this case, in
consultation with a Mercedes-Benz service
centre, mix the fuel with the cleaning additive rec-
ommended byMercedes-Benz. Obser vethe no tes
and mixing ratios indica ted on theta nk. 360 360
Te
ch nical data

Inf
Inf
or
ormation on fuel q
mation on fuel q uality f
uality for v
or vehicles wit
ehicles wit h a die-
h a die-
sel engine
sel engine
Gener Gener al not
al not es
es
Obser vethe no tes on operating 0uids
(/ page 358). &
W
WARNING
ARNING Risk of /re from fuel mixtu re
If yo u mix diesel fuel with petrol, the 0ash
point of the fuel mixture is lo werth an that of
pure diesel fuel. #
Neverre fuel using petrol in diesel
engines. #
Never mix petrol with diesel fuel. *
N
NO OTE
TE Damage caused bythe wrong fuel Even small amounts of
the wrong fuel could
re sult in damage tothe fuel system, the
engine and the emission control system. #
V
Vehicles wit
ehicles wit h a diesel par
h a diesel par ticulat
ticulate
e/lt
/lt er:
er:
Only refuel using sulphur-free diesel fuel th
at conforms toEuropean standard
EN 590, or an equivalent speci/cation.
In count ries without sulphur-free diesel
fuel, refuel using only lo w-sulphur diesel
fuel with a sulphur content less than
50 ppm.
Ne verre fuel wi thone of thefo llowing fuels:
R Petrol
R Marine diesel
R Heating oil
R Pure fatty acid me thyl ester (bio-diesel) or
ve ge table oil
R Para1n or kerosene
If yo u ha veacciden tally refuelled wi th the
wrong fuel: #
Do not switch on theve hicle. #
Consult a quali/ed specialist workshop. The
following compatibility indication for fuel
applies toyour vehicle: 1
For diesel fuel with a maximum of 7% byvol-
ume bio-diesel (fatty acid me thyl ester)
Ac cording toEuropean standard EN 16942 you
can /nd the compatibility indications at thefo l-
lowing locations:
R Ontheve hicle on the information label on the
fuel /ller 0ap (/ page 171)
R Onthe fuel dispenser or pump nozzle suitable
fo ryo ur vehicle thro ughout Europe
Inf
Inf or ormation on lo
mation on lo w outside t
w outside tem
emper
per atur
atur es
es
Re fuel your vehicle with as much winter diesel fuel
as possible at the beginning of winter. Te
ch nical data
361
361

Before
changing over towinter diesel fuel, the fuel
ta nk should be em pty, if possible. When /rst refu-
elling wi thwinter diesel fuel, keep the fuel le vel
lo w, e.g. toreser veleve l. The fuel tank can be /l-
led as usual when next refuelling.
Fu rther information on fuel can be obtained at a
/lling station or a quali/ed specialist workshop.
T
T ank cont
ank cont ent and fuel r
ent and fuel r eserve
eser ve
The tota l capacity of the fuel tank may vary,
depending on theve hicle equipment. T
T o
o t
tal capacity and r
al capacity and r eserv
eserve fuel t
e fuel t ank
ank Mode
lT ot
Mode lT otal capacity
al capacity
E 300
E 350
E 450 4MATIC 66.0 lit
res
All other model s5 0.0 litres
or
66.0 litres Model Model
of whic
of which r
h r eserv
eserv e fuel
e fuel
All models 7.0 litres A
A
dBlue
dBlue ®
®
(v
(vehicles wit
ehicles wit h a diesel engine onl
h a diesel engine onl y)
y) N
No
ot
tes on A
es on A dBlue
dBlue®
®
Obser vethe no tes on operating 0uids
(/ page 358).
Ad Blue ®
is a water-soluble 0uid forth e NOx
ex haust gas aTertreatment of diesel engines.
It may be improper or punishable in some coun-
tries tooperate a vehicle that uses no AdBlue ®
or one
that does not comply with the speci/cations
of these operating inst ructions.
* N
NO OTE TE Malfunctions due tothe dilution of
Ad Blue ®
or the use of additive-enhanced
Ad Blue ® The function of
the NOx exhaust gas aTer-
treatment can be impaired bythe use of
unsuitable denoxi/cation agents. #
Only use AdBlue ®
in acco rdance with
ISO 22241. #
Do not dilu teAd Blue ®
wi th wa ter. #
Do not use additive-enhanced AdBlue ®
. *
N NOOTE TE Dama geand malfunctions due to
impurities in AdBlue ® Consequences of impurities in
AdBlue ®
:
R increased emission values
R damage tothe catalytic con verter
R NOx exhaust gas aTertreatment malfunc-
tions 362
362
Te
ch nical data

#
Avoid impurities in AdBlue ®
. Ad
Blue ®
residues cr ystallise aTer a period of
time, and contaminate the sur faces with which
th ey come into contact. Clean the dirty sur faces
with water as soon as possible.
When you open theAd Blue ®
tank, small amounts
of ammonia vapour may escape. Do not inhale
any ammonia vapours that may be released. Only
/ll theAd Blue ®
tank in well-ventilated areas.
A
A dBlue
dBlue ®
®
/lling
/lling capacity and consump
capacity and consump tion
tion
Tot
Tot al capacity of A
al capacity of A dBlue
dBlue®
®
t
tank
ank Model
Tot
Mode lT otal capacity
al capacity
All model s1 4 litresA
A
dBlue
dBlue ®
®
consump
consump tion
tion
The average AdBlue ®
consu mption is between 1%
and 5% of fuel consum ption. Like fuel consump-
tion, AdBlue ®
consu mption is high lydependent
upon driving style and operating conditions. For
th is reason, your vehicle's actual consu mption /g-
ures under da y-to -day operating conditions may di.er from
the consum ption /gures calculate d.
The frequency at which you will ha veto to p up
Ad Blue ®
will also vary. Ha vetheAd Blue ®
supply
ch ecked at a quali/ed specialist workshop before
making jou rney s outside of Europe. Before a lon-
ge r st ayoutside of Europe, consult a quali/ed
specialist workshop.
A
A dBlue
dBlue ®
®
r
rang
ang e and
e and /ll
/lllev
level
el
Yo u can ha vetheAd Blue ®
range and le vel dis-
pla yed in the driver's displa y.
% The AdBlue ®
range sh own depends strongly
on the driving style and operating conditions.
The actual range can therefore deviate from
th era nge cur rently displa yed in the driver's
displa y.
The information supplied in the operator's manual
re ga rding there ser vequantity at the /r stwa rning
in the driver's display and on the minimum top-up
qu antity when theAd Blue ®
tank is em pty is also
to be understood as guide values. Engine oil
Engine oil
N
No
ot
tes on engine oil
es on engine oil
Obser vethe no tes on operating 0uids
(/ page 358). *
N NOOTE TE Engine damage caused byan inco r-
re ct oil /lter, incor rect oil or additi ves #
Do not use engine oils or oil /lters other
th an those which meet the speci/cations
necessary forth e prescribed service
inter vals. Te
ch nical data
363
363

#
Do not alter the engine oil or oil /lter in
order toachie velonger change inter vals
th an prescribed. #
Do not use additives. #
Have the engine oil changed aTer the
prescribed inter vals. Mercedes-Benz
recommends having the oil
ch anged at a quali/ed specialist workshop.
Only use engine oils appr ovedfo ryo ur vehicle by
Mercedes-Benz.
P
P e etr
tr ol engines:
ol engines: for cer tain countries, di.erent
engine oils can be used in conjunction with
re duced maintenance inter vals. Further informa-
tion on di.erent engine oils can be obtained at a
qu ali/ed specialist workshop. Quality and capacity of engine oil
Quality and capacity of engine oil
Engine oil Engine oil speci/cations
speci/cations P P
e etr
tr ol engines
ol engines MB-Fr
MB-Freig
eigabe or MB-
abe or MB-
Appr ov
Approv al
al
E 450 4MATIC 229.51, 229.52,
229.61, 229.71
229.72*
All other model s2 29.51, 229.52,
229.61
229.71* Engine oil
Engine oil
speci/cations
speci/cations Diesel engines
Diesel engines
MB-Fr
MB-Freig
eigabe or MB-
abe or MB-
Appr ov
Approv al
al
E 400 d 4MATIC 229.52
229.61*
All other model s2 29.52, 229.61,
229.71
229.72* *
re commended for lo west possible fuel con-
su mp tion (lo westSA E viscosity class in each
case; obser vepossible restrictions of the
appr ovedSA E viscosity classes)
To achie vethe lo west possible fuel consum ption,
it is recommended touse the engine oil speci/ca-
tions mar ked in theta ble forth e lo westSA E vis-
cosity class. Possible restrictions of the appr oved
SA E viscosity classes must be obser ved.
% Ifth e engine oils listed in theta ble are not
av ailable, you may add a maximum of 1.0 litre
of thefo llowing engine oils once onl y.
Engine oils for one-time /lling only in exceptional
cases:
R P
P e etr
tr ol engines:
ol engines:
- All models:
All models: MB-Freigabe or MB-Appr oval
229.31 ACEA C3
R Diesel engines:
Diesel engines:
- E 400 d 4MA
E 400 d 4MA TIC:
TIC:MB-F reigabe or MB-
Appr oval 229.51 ACEA C3
- Allot
All other models:
her models: ACEA C3
The following values referto an oil change, includ-
ing the oil /lter. 364
364
Te
ch nical data

Engine oil
Engine oil
/lling
/llingcapacity
capacity Model
Model
Capacity
Capacity
E 200 4MATIC 6.0 litres
E 220 d
E 220 d 4MATIC 6.3 litres
E 300 d 4MATIC 6.5 litres
E 400 d 4MATIC 7.5 litres
E 450 4MATIC 8.5 litres
All other model s6 .6 litres N No
ot
tes on br
es on br ak
ake
e0uid
0uid Obser
vethe no tes on operating 0uids
(/ page 358). &
W
WARNING
ARNING Risk of an accident due to
va pour poc kets form ing in the brake sys-
tem
The brake 0uid constantly absorbs moisture
from the air. This lo wersthe boiling point of
th e brake 0uid. If the boiling point is too lo w,
va pour poc kets may form inthe brake system
when the brakes are applied hard.
This impairs the braking e.ect. #
Have the brake 0uid rene we d at the
speci/ed inter vals. Ha
ve the brake 0uid regula rly re placed at a quali-
/ed specialist workshop.
Only use a brake 0uid appr ovedby Mercedes-
Benz according toMB-F reigabe or MB-Appr oval
331.0. Coolant Coolant
N
No
ot
tes on coolant
es on coolant
Obser vethe no tes on operating 0uids
(/ page 358). &
W
WARNING
ARNING Risk of /re‑ and injury from
antif reeze
If antifreeze comes into contact with hot com-
ponent parts in the engine compartment, it
may ignite. #
Allow the engine tocool down before
yo uto p up the antifreeze. #
Make sure that no antif reeze spills out
next tothe /ller opening. #
Thoroughly clean the antifreeze from
component parts before starting the
ve hicle. *
N
NOOTE
TE Damage caused byincor rect cool-
ant #
Only use coolant that has been premixed
with there qu ired antifreeze pr otection.
Information on coolant is available at thefo l-
lowing locations:
R Inthe Mercedes-Benz Speci/cation for
Operating Fluids 320.1 Te
ch nical data
365 365