2021 MERCEDES-BENZ C-CLASS CABRIOLET radio

Display messages
Possible causes/consequences and M
MSolutions #
Tryto start theve hicle. #
Ifth eve hicle does not start, consult a qualified specialist workshop.
Cannot start engine See
Owner's Manual *T
hestate of charge ofthe 48 V battery is too lo w.You can no lon gerst art theve hicle. #
Switch off electrical consumers that are not required. #
Connect a suitable charge r appro vedfo r Mercedes-Benz with suf ficient charge output tothe jump-s tart connec‐
tion point of the12 V battery (/ page 384).
The 48 V battery is charge d via thevo ltage con verter in theve hicle.
Motor can be started again *T
he 48 V battery has been charge d automatically via thevo ltage con verter. #
Start theve hicle and drive for a while tocharge the12 V battery and the 48 V batter y. Ty
re pressure moni tor Display messages
Possible causes/consequences and M MSolutions
Tyre press. monitor cur-
rently unavailable *T
here is inter fere nce from a po werful radio signal source. As a result, no signals from the tyre pressure sensors are
being recei ved. The tyre pressure monitoring sy stem is temp orarily una vailable.
The tyre pressure monitoring sy stem will restart automatically as soon as the cause has been rectified. #
Drive on.
Tyre press. monitor inoper-
ative *T
he tyre pressure monitoring sy stem is malfunctioning. Display messages and
warning/indicator lamps 475

Calling up.............................................. 252
Deleting................................................. 252
Moving................................................. .252
Overview................................................ 251
Re naming.............................................. 252
Fi lling station sear ch
St arting automatic sear ch..................... 273
Switching the automatic sear chon/
off.........................................................2 79
Using auto matic search......................... 279
Fire extinguisher....................................... 373
Fi rs t-aid kit (soft sided) ............................373
Flat towing
see Tow- bar sy stem
Flat tyre MOEx tended tyres................................. 375
No tes..................................................... 374
TIREFIT kit..............................................3 76
Wheel chang e....................................... .405
Floor mats.................................................. 11 8
Fo g light (enhanced) .................................1 23
Fo il co vering
Ra dar and ultrasonic sensor s................16 8Fo
lding draught stop
Car e...................................................... 368
Fitting...................................................... 85
Re moving............................................... .85
Fr ee software.............................................. 36
Fr equencies
Tw o-w ayradio........................................ 413
Fr ont airbag................................................. 44
Fr ont passenger seat
see Seat
Fu el
Ad ditives................................................ 419
Diesel..................................................... 419
E1 0........................................................ 41 8
Fu elreser ve........................................... 421
Low outside temp eratures..................... 419
Pe trol..................................................... 41 8
Quality (diesel )....................................... 419
Quality (petrol)....................................... 41 8
Re fuelling.............................................. 15 5
Sulphur content..................................... 41 8
Ta nk content.......................................... 421
Fu nction seat
see Door cont rol panel Fu
ses
Before replacing a fuse.......................... 391
Fu se assignment diagram...................... 391
Fu se box in the boot.............................. 394
Fu se box in the engine compartmen t.... 392
Fu se box in the front passenger foot‐
we ll....................................................... .394
Fu se box on the dashboard................... 393
No tes..................................................... 391 G
Garage door opener Cleari ngthe memory.............................1 64
Programming buttons............................ 16 2
Re solving problems...............................1 64
Synchronising thero lling code............. .163
Garage door openers Opening/closing the door.....................1 64
Gearshift recommendation..................... .153
Gene ral operating permit number (EU)... 414
Genuine parts.............................................. 22
Genuine wood (Care) ................................ 369
Glide mode................................................ .154 516
Index

Individual drive prog
ram
Con figuring............................................ 15 0
Selecting............................................... 14 9
Inspection see AS SYST PLUS
Instrument clus ter
Fu nction/no tes............................. 226, 227
In stru ment display
Fu nction/no tes..................................... 227
Instrument clu ster................................... 10
Wa rning/indicator lamps...................... 485
Instrument display and on-boa rd
compu ter
Fu nction/no tes..................................... 226
In te lligent Light Sy stem
Ac tivating/deactivating......................... 124
Ac tive headla mps.................................. 12 2
Ad aptive Highbeam Assist Plus.............. 124
Bad weather light.................................. .124
City lighting.......................................... .124
Corne ring light....................................... 12 2
Fo g light (enhanced)..............................1 23
Mo torw ay mode..................................... 12 3
Overview............................................... 12 2Interior lighting
Adjusting............................................... 12 6
Ambient lighting.................................... 127
Re ading lam p......................................... 12 6
Switch-off del aytime............................. 127
Interior pr otection
Fu nction.................................................. 93
Priming/deactivating............................... 94
Intermediate destination Calculating a route with intermediate
destinations.......................................... .275
Entering................................................. 274
Modifying............................................... 274
St arting an automatic filling station
sear ch................................................... 273
St arting the automatic service sta‐
tion sear ch............................................ 280
In tern etconnection
Cancelling permission (mobile phone).. 325
Communication module function.......... 322
Displaying the connection status.......... 325
Editing access data (Blue tooth®
)........... 324
Information............................................ 322
Mobile phone de tails............................ .325
Overview of connection status.............. 325 Re
strictions........................................... 322
Setting access da ta(Blue tooth ®
).......... 323
Setting up (Blue tooth®
).........................3 23
Setting up (Wi-Fi)................................... 323
Switching Blue tooth®
profile (DUN/
PA N)...................................................... 324
Internet radio
see TuneIn
Ionisation Activating/deactivating (multimedia
sy stem).................................................. 13 4
iPhone ®
see Apple CarPlay ®
see Mercedes-Benz Link
ISOFIX child seat anchor
Seats suitable for attaching..................... 60
ISOFIX child seat securing sy stem
Fitting..................................................... .62 J
Jack Declaration of conformity........................ 28
Storage location.................................... 404 518
Index

see PRE-SAFE
®
PLUS (anticipatory
occupant pr otection plus)
see Restra int sy stem
see Seat belt
Oil see Engine oil
On-board computer Displaying the service due dat e............. 354
Head-up displ aymenu........................... 231
Multifunction display............................. 229
Operating.............................................. 228
Overview of menus................................ 228
On-board diagno stics inter face
see Diagno stics connection
On-boa rdelectronics
Engine electronics................................. 412
No tes..................................................... 412
Tw o-w ayradios...................................... 412
Online services Data storage............................................ 35
Open-source software................................ 36
Operating fluids AdBlue ®
................................................. 421 Ad
ditives (fuel)....................................... 419
Brake fluid............................................. 424
Coolant (engine).................................... 424
Engine oil............................................. .422
Fu el (diesel)...........................................4 19
Fu el (petrol)...........................................4 18
No tes..................................................... 416
Wi ndsc reen washer fluid...................... .425
Operating saf ety
48 V on-boa rdelectrical sy stem.............. 23
Declaration of confo rmity (elect ro‐
magnetic compatibility)........................... 25
Declaration of conformity (jack).............. 28
Declaration of conformity (TIREFIT kit).... 29
Declaration of conformity (wire less
ve hicle components)...............................25
EQ Boo sttech nology............................... 23
Information.............................................. 23
Ope rating sy stem
see On-board computer
Optimised acceleration Activating............................................... 141
Outside mir rors
Anti-dazzle mode (automatic)................ 131Au
tomatic mir rorfo lding function......... .132
Fo lding in/out....................................... 13 0
Operating the memory function............. 11 0
Pa rking position..................................... 131
Setting................................................... 13 0
Overhead control panel Overview.................................................14
Owner's Manual Vehicle equipment................................... 23
Owner's Manual (digital)............................ 20 P
Pa int code .................................................. .414
Pa intwork (cleaning instructions) ...........364
Park position
Inserting................................................ 15 2
Selecting au tomatical ly......................... 15 2
Park ing
see Electric parking brake
Park ing aid
see Parking Assist PARKTRONIC
Park ing Assist PARKTRONIC
Ac tivating............................................... 213524
Index

Pr
otection against collision ......................218
Pr otection of the environment
No tes.......................................................21
Ta ke -ba ckof end-of-life vehicles..............21 Q
Qibla...........................................................2 94
QR code Rescue card............................................33
Qualified specialist workshop .................... 31R
Ra dar and ultrasonic senso rs
Damage................................................. 16 8
Ra dio
Ac tivating.............................................. 340
Ac tivating/deactivating radio text......... 343
Ac tivating/deactivating traf fic
announcements................................... .343
Calling up a slide sho w.......................... 342
Calling up thest ation lis t...................... .342
Deleting stations.................................. .342
Direct frequency entr y.......................... 342
Displaying information........................... 343 Displaying
radio text.............................. 343
Fr equency fix......................................... 343
Managing favo urites.............................. 342
Managing station presets...................... 342
Moving stations.................................... .342
Overview................................................ 341
Sear ching forst ations.......................... .342
Setting a channel................................... 341
Setting station trackin g......................... 343
Setting the frequency band................... 341
Setting the traf fic information
service volume inc rease........................ 343
St oring radio stations............................ 342
Ta gging music trac ks............................. 343
Vo ice commands (LINGU ATRO NIC)....... 24 0
Ra in-closing feature
Side wind ows.......................................... 89
RE AC Hregulation........................................31
Re ading lamp
see Interior lighting
Re ar fog light
Switching on/of f................................... 12 0
Re ar seat
see Seat Re
ar seat belt
St atus display......................................... .43
Re ar seat belt status display ..................... 43
Re ar window heater.................................. 13 3
Re ar-view mir ror
Anti-dazzle mode (automatic)................ 131
Re ar-view mir ror
see Outside mir rors
Re cycling
see Take -ba ckof end-of-life vehicles
Re ducing agent
see AdBlue ®
Re fuelling
Re fuelling theve hicle............................1 55
Re gistration
Ve hicle.....................................................31
Re gulatory radio identification................. 414
Re mo teOnline
Charging thest ar ter battery.................. 13 9
Cooling/heating theve hicle interior...... 13 9
St arting theve hicle............................... 14 0
Re scue card................................................. 33 526
Index

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

Saving
stations...................................... 327
Selecting and connecting a statio n....... 327
Tu rn signal indicator
Ac tivating/deactivating......................... 121
TV Activating.............................................. 344
Ad justing the brightness.......................3 50
Calling up the menu (CI+ module)......... 351
Displa ysintheTV control menu............ 346
Fu nction/no tes (audio language,
subtitles)............................................... 349
Information............................................ 343
Overview............................................... 345
Picture settings.....................................3 50
Picture settings overview...................... 350
Setting subtitles................................... .349
Setting the audio languag e.................... 349
Showing telete xt.................................... 350
Showing/hiding full screen................... 346
Te lete xt overview...................................3 49
Vo ice commands (LINGU ATRO NIC)....... 24 0
TV channel
Ac tivating/deactivating channel fix. ...... 347
Channel fix............................................ 347
Channel li stove rview........................... .347 EPG (electronic prog
ramme guide)........ 347
Overview of favo urites.......................... .348
Quick sa ve............................................. 348
Selecting from thech annel list.............. 346
Selecting from the control menu........... 346
Selecting from thefa vo urites................ 346
Selecting in the bac kground.................. 347
St oring..................................................3 48
Using a voice tag................................... 348
Tw o-w ayradios
Fr equencies........................................... 413
No tes on ins tallation.............................. 412
Tr ansmission output (maximum )............ 413
Ty re inflation compressor
see TIREFIT kit
Ty re pressure
Checking (ty repressure monitoring
sy stem)................................................. 398
No tes....................................................3 96
Re starting the tyre pressure loss
wa rning sy stem..................................... 400
Re starting the tyre pressure monitor‐
ing sy stem.............................................3 99
TIREFIT kit.............................................. 376Ty
re pressure loss warning sy stem
(function)............................................... 399
Ty re pressure monitoring sy stem
(function)............................................... 398
Ty re pressure table................................ 397
Ty re pressure loss warning sy stem
Fu nction................................................ 399
Re starting.............................................. 400
Ty re pressure moni tor
Fu nction................................................ 398
Ty re pressure moni toring sy stem
Checking the tyre pressure...................3 98
Che cking the tyre temp erature............. 398
Re starting.............................................. 399
Ty re pressure table .................................. .397
Ty re temp erature
Checking (tyre pressure monitoring
sy stem)................................................. 398
Ty re pressure monitoring sy stem
(function)............................................... 398
Ty re tread ................................................... 395
Ty re-change tool kit
Overview............................................... 404 534
Index