2021 MERCEDES-BENZ C-CLASS CABRIOLET fuel cap

R
NOx exhaust gas af tertre atment malfunc‐
tions #
Avoid impurities in AdBlue ®
. Ad
Blue ®
re sidues cr ystallise af ter a period of
time, and contamina tethe sur faces wi thwhich
th ey come into contact. Clean the dirty sur faces
wi th wate r as soon as possible.
When you open theAd Blue ®
tan k,small
amounts of ammonia vapour may escape. Do
not inhale any ammonia vapours that may be
re leased. Only fill th eAd Blue ®
tank in well-venti‐
lated areas.
Ad Blue ®
filling capacity and consum ption Model
Total capacity
All models 14litres Ad
Blue ®
consu mption
The average AdBlue ®
consu mption is between
1% and 5% of fuel consumption. Li kefuel con‐
sum ption, AdBlue ®
consu mption is highly dependent upon driving
style and operating con‐
ditions. Forth is reason, your vehicle's actual
consum ption figures under da y-to -day operating
conditions may di ffer from the consum ption fig‐
ures calculated. The frequency at which you will
ha ve to to p up AdBlue ®
will also vary. Ha vethe
Ad Blue ®
supply checked at a qualified specialist
wo rkshop before making journe ysoutside of
Europe. Before a longer stay outside of Europe,
consult a qualified specialist workshop.
Ad Blue ®
ra nge and fill le vel
The AdBlue ®
fill le vel and range can be displ ayed
via the on-board computer. The AdBlue ®
ra nge
shown depends strongly on the driving style and
operating conditions. The actual range can
th erefore deviate from thera nge cur rently dis‐
pl ay ed in the on-board computer. The informa‐
tion supplied in the Owner's Manual rega rding
th ere ser vequantity at thefirs t display warning
and on the minimum top-up quantity when the
ta nk is em pty is also tobe under stood as guide
va lues. Engine oil
Note
s on engine oil
Obser vethe no tes on operating fluids
(/ page 416). *
NO
TEEngine dama gecaused byan
incor rect oil filter, incor rect oil or addi‐
tives #
Do not use engine oils or oil filters
which do not cor respond tothe specifi‐
cations explicitly prescribed forthe
service inter vals. 422
Tech nical da ta

#
Do not al terth e engine oil or oil filter in
order toachie velonger change inter vals
th an presc ribed. #
Do not use additives. #
Have the engine oil rene we d at regular
inter vals. Mercedes-Benz
recommends that you ha vethe
oil change car ried out at a qualified specialist
wo rkshop.
Only use engine oils appr oved byMercedes-
Benz.
Pe trol engines: for cer tain countries, dif fere nt
engine oils can be used in conjunction wi th
re duced maintenance inter vals.
% Further information on dif fere nt engine oils
can be ob tained at a qualified specialist
wo rkshop. Quality and capacity of engine oil Pe
trol engine sM B-Freigabe or MB-
Appr oval
C 400 4MATIC 229.5
229.6*
All other models 229.51 , 229.52,
229.61
229.71* Diesel engines MB-
Freigabe or MB-
App roval
All model s2 29.52, 229.61
229.71* *
re commended for lo west possible fuel con‐
sum ption (lo westSA E viscosity class in ea ch
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 specifi‐
cations mar ked in theta ble forth e lo west SAE viscosity class.
Possible restrictions of the
appr ovedSA E viscosity classes mu stbe
obser ved.
% Ifth e engine oils lis ted in theta ble are not
av ailable, you may add a maximum of
1. 0 litr e ofthefo llowing engine oils once
onl y.
Engine oils for one-time filling only in exceptional
cases:
R vehicles with a petrol engine:
- C 400 4MATIC: MB-Freigabe or MB-
Appr oval 229.3 or ACEA A3/B4
- allother models: MB-Freigabe or MB-
Appr oval 229. 31orAC EA C3
R vehicles with a diesel engine: ACEA C3
The following values referto an oil change,
including the oil filter. Te
ch nical da ta423

Sy
stem limits.........................................1 98
Tr ailer operation.................................... 19 8
Ac tive Parking Assist
Exiting a parking space......................... .216
Fu nction................................................. 213
Pa rking................................................. .215
Sy stem limitations................................. 213
Ac tive Se rvice Sy stem PLUS
see AS SYST PLUS
Ac tive Speed Limit Assi st
Displ ay.................................................. 183
Fu nction................................................ 183
Ac tive Steering Assist
Ac tivating/deactivating......................... 187
Ac tive Emergency Stop Assis t............... 188
Fu nction................................................ 186
Sy stem limits.........................................1 86
Ad aptive brake lights ................................ 174
Ad aptive cruise control
see Active Dis tance Assi stDISTRONIC
Ad aptive Highbeam Assist Plus
Fu nction................................................. 124
Switching on/of f................................... 12 5Ad
Blue ®
Ad ditives................................................ 421
Capacity................................................ 422
No tes..................................................... 15 8
Purity..................................................... 421
To pping up............................................. 15 9
Ad ditional door lo ck.................................... 75
Ad diti ves
Ad Blue ®
................................................. 421
Engine oil.............................................. 422
Fu el........................................................4 19
Ad diti ves (AdBlue ®
)
see AdBlue ®
Ad diti ves (engine oil)
see Additives
Ad diti ves (fuel)
see Fuel
Ad dress book
see Contacts
Ad justing bass, mid- range and treble
settings
Adva nced sound sy stem........................3 53Ad
justing mid- range, treble and bass
settings
Adva nced sound sy stem........................3 53
Ad justing the balance/ fader
Adva nced sound sy stem........................3 53
Burmes ter®
sur round sound sy stem..... 353
Ad justing the bass, mid- range and
treble
Burmes ter®
sur round sound sy stem..... 352
Ad justing the mid- range, treble and
bass
Burmes ter®
sur round sound sy stem..... 352
Ad justing the sound focus
Burmes ter®
sur round sound sy stem..... 353
Ad justing treble, mid- range and bass
settings
Adva nced sound sy stem........................3 53
Burmes ter®
sur round sound sy stem..... 352
ADS PLUS damping sy stem
see AIRMATIC
Ad vanced sound sy stem
Ad justing the balance/fader................. 353 Index
501

SV
HC (substances of very high con‐
cern) ............................................................. 31
Switch-off delay time Exterior.................................................. 12 6
Interior................................................... 127
Switching the sur round sound on/off
Burmes ter®
sur round sound sy stem..... 353
Synchronisation function Activating/deactivating (control
panel).................................................... 13 4
Sy stem settings
Ac tivating/deactivating PIN pr otec‐
tion........................................................ 263
Re set function (MBUX multimedia
sy stem).................................................. 267
Setting the dis tance uni t....................... 262
Setting the time and date automati‐
cally.......................................................2 57
Setting the time zone. ........................... 257
Setting the time/date form at............... .258
Switching transmission of theve hicle
position on/off...................................... 258
Sy stem settings
see Blue tooth® see Data import/export
see Language
see Wi-Fi T
Ta ilpipes (care)......................................... .368
Ta ke -back of end-of-life vehicles
Pr otection of the environmen t................. 21
Ta nk content
Ad Blue ®
................................................ 422
Fu el....................................................... 421
Re ser ve(fuel)........................................ 421
Te ch nical data
Axle load (trailer operation)...................4 29
Fa stening points (trailer hitch)............... 427
Information............................................ 412
Mounting dimensions (trailer hitch)....... 427
No tes (trailer hitch)............................... 427
Overhang dimension (trailer hitch)........4 27
Re gulatory radio identification...............4 14
To ngue weight...................................... .428
To wing capacity (trailer operation)........ 428
Ve hicle identification plate..................... 414Te
lephone
Ac tivating functions du ring a cal l.......... 302
Call and ringtone volume...................... .302
Calls with se veral participant s............... 302
Connecting a mobile phone (Near
Field Communication (NFC)).................. 301
Connecting a mobile phone (Passk ey)... 298
Connecting a mobile phone (Secure
Simple Pairing)...................................... 298
De-authorising a mobile phon e.............. 300
Disconnecting a mobile phone............. .300
Importing contacts................................ 304
Importing contacts (o verview).............. .304
Incoming call during an existing call..... .303
Information............................................ 298
Inter changing mobile phones............... .299
Mobile phone voice recognition............ 302
No tes....................................................2 95
Operating modes................................... 298
Re ception and transmission volume...... 301
Swit ching mobile phones (Near Field
Communication (NFC)).......................... 301
Te lephone menu overview. .................... 297
Te lephone operation.............................. 302
Using Near Field Communication
(NFC)..................................................... 301 Index
531

Wa
rning triangle
Re moving............................................... 372
Setting up.............................................. 373
Wa rning/indicator lamp
! ABSwarning lamp....................... .495
J Brake sy stem warning lamp
(red)...................................................... 493
J Brake sy stem warning lamp
(yellow).................................................. 493
ÿ Coolant warning lamp................. .489
! Electric parking brake indicator
lamp (red).............................................. 492
# Electrical fault warning lamp....... .491
; Engine diagnosis warning lamp... .491
å ESP®
OFF warning lamp.............. .497
÷ ESP®
wa rning lamp..................... .496
8 Fuelreser ve wa rning lamp
lights up................................................ 492
Ù Powe rst eering warning lamp
(red)...................................................... 488 6
Restra int sy stem warning lamp... .487
ü Seat belt warning lamp................ 487
ä Suspension warning lamp (yel‐
low)....................................................... 495
! The elect ric pa rking brake (yel‐
low) indicator lamp............................... .492
ï Trailer tow hit chwarning lam p..... 489
h Tyre pressure monitoring sys‐
te m wa rning lamp................................. .498
L Warning lamp for dis tance
wa rning function................................... .494
Overview............................................... 485
Wa rning/indicator lamps
PA SSENGER AIR BAG.............................. 49
Wa rranty ...................................................... 32
Wa sher fluid
see Windsc reen washer fluid
Wa shing byhand (care)............................ 364
Wa ter tank
see Air-water duct We
ather information ................................. 295
What3words Destination entry with a 3 word
address................................................. 275
Wheel change
Fitting a new wheel............................... 408
Lo we ring theve hicle.............................4 09
Prepa ration.......................................... .405
Ra ising theve hicle................................4 06
Re moving a wheel................................. 408
Re moving/fitting hub caps................... .405
Wheel change
see Emergency spa rewheel
Wheel rotation .......................................... .403
Wheels Care ...................................................... 368
Checking............................................... 395
Checking the tyre pressure (tyre
pressure monitoring sy stem)................. 398
Fitting.................................................... 408
Flat tyre.................................................3 74
Inter changing....................................... .403
MOExtended tyres................................. 375
Noise.....................................................3 95 Index
537