2018 MERCEDES-BENZ C-CLASS CABRIOLET engine coolant

Display messages
Possible causes/consequences and 0050
0050Solutions
Cannot start engine See
Owner's Manual *T
hecharge leve l of the 48 V battery is too lo w.You can no lon gerst art the engine. 0007
Switch off electrical consumers that are not required. 0007
Connect a suitable charge r appro vedby Mercedes-Benz with suf ficient charge output tothe jump-s tart connec‐
tion point of the12 V battery (0013 page 420).
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. 0007
Start the engine and drive theve hicle for a while tocharge the12 V battery and the 48 V batter y.
00AC *T
hefan mo tor is defective. 0007
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C.
00AC
Coolant Stop vehicle
Switch engine off *T
he coolant is too hot. 0007
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. 000A
WARNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. 0007
Before opening the bonn et, allow the engine tocool down. 0007
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. 498
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions 0007
Wait until the engine has cooled down. 0007
Make sure that the air supply tothera diator is not obstructed. 0007
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C.
00D7
Please wait Charging high-
voltage battery *T
he 48 V battery is dischar ged. You ha veswitched on the ignition while the12 V battery was being charge d with a
suitable charge r or while ano ther vehicle was pr oviding starting assis tance.
The discha rged 48 V battery is charge d automatically via thevo ltage con verter. Af ter a few minutes, theMotor can
be started again display message will be shown on the multifunction displa y. 0007
Start the engine. 0007
Drive theve hicle for a while tocharge the12 V battery and the 48 V battery af ter disconnecting thech arger
from theve hicle.
If th eMotor can be started again display message does not appear af ter a few minutes: 0007
Tryto start the engine again. 0007
Ifth e engine does not start, consult a qualified specialist workshop.
003D
48 V battery See Owner's
Manual *T
he 48 V sy stem is malfunctioning. Con venience functions may be restricted. 0007
Consult a qualified specialist workshop immediatel y. Displ
aymessa ges and warning/indicator lamps 499

0057
High beam (0013
page 129)
003E003D Tu
rn signal indicator
(0013 page129)
005E Re
ar fog light (0013 page127)
0075 Re
stra int sy stem (0013 page 528)
00E9 Seat belt not
fastened
(0013 page 534)
004D Brakes (yellow) (0013
page 528)
004D Brakes (red) (0013
page 528)
0024 Elect
ric pa rking brake (yellow)
(0013 page 528)
0024 Electric parking brake (red)
(0013
page 528) 0025
ABS malfunction (0013
page 528)
00E5 ESP®
(0013 page 528)
00BB ESP®
OFF (0013 page 528)
L Distance warning (0013 page 534)
00CC Po
we r-assis tedsteering malfunction
(0013 page 539)
00CC AIRMATIC malfunction
(0013
page 534)
00CC DY
NA MIC BODY CONTROL malfunc‐
tion (0013 page 534)
00B9 Engine diagnostics (0013
page 535)
0028 Preglow 003D
Electrical
fault( 0013 page 535)
00B6 Fu
elreser vewith fuel filler flap loca‐
tion indicator (0013 page 535)
00AC Coolant
too hot/cold
(0013 page 535)
0077 Ty
re pressure monitor
(0013 page 538)
00CA Tr
ailer hit chis not operational or is
swivelling(0013 page 539)Saf
ety sy stems Wa
rning/indicator lamp
Possible causes/consequences and 0050 0050Solutions
004D Brake sy stem warning lamp
(red) The
red brake sy stem warning lamp is lit while the engine is running.
Po ssible causes:
R The brake forc e boosting is malfunctioning and the braking characteristics may be af fected.
R The reis insuf ficient brake fluid in the brake fluid reser voir. 528
Display messages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and 0050
0050Solutions 0007
Start the engine thre eto four times af terre fuelling.
If th eye llow engine diagnosis warning lamp goes out, emer gency operation mode is cancelled. The vehicle need not
be checked.
003D Elect rical fault warning
lamp The
red elect rical fault warning lamp is lit.
There is a fault in the electrics. 0007
Obser vethe messages on the multifunction displa y.
00B6
Fu elreser ve wa rning lamp The
yellow fuel reser vewarning lamp is lit while the engine is running.
The fuel supply has dropped into there ser verange. 0007
Refuel.
00AC
Coolant warning lamp The
red coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The coolant le vel is too low
R The air supply tothera diator is obstructed
R The radiator fan is faulty
If th ere is an additional warning tone, the coolant temp erature has exceeded 120 °C. 536
Displaymessa ges and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and 0050
0050Solutions 000A
WARNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. 0007
Before opening the bonn et, allow the engine tocool down. 0007
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. 0007
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. Do not con‐
tinue driving under any circums tances. 0007
Obser vethe messages on the multifunction displa y.
If th e coolant temp erature display is at the lo wer end of thete mp erature scale: 0007
Consult a qualified specialist workshop.
or 0007
Exit theve hicle and keep a safe dis tance from it until the engine has cooled down. 0007
Check the coolant le vel (0013 page 394). 0007
Make sure that the air supply tothera diator is not obstructed. 0007
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that the
coolant temp erature display remains below 120 °C. Displ
aymessa ges and warning/indicator lamps 537

Importing (o
verview) .......................... .336
Information .......................................... 335
Making a call ....................................... 337
Na me form at ...................................... .336
Options ................................................ 337
St oring .................................................3 37
Controller Operating ............................................ 280
Con venience closing ................................. 87
Con venience opening ................................ 87
Coolant (engine) Check le vel .......................................... 394
No tes .................................................. 466
Cooling see Climate control
Co pyright .................................................... 31
Cornering light ........................................ .131
Cross Traf fic Alert .................................. .232
Crosswind Assist Function/no tes ................................... 188
Cruise control .......................................... 19 5
Ac tivating ............................................ .197 Buttons ................................................
197
Calling up a speed .............................. .197
Deactivating ......................................... 197
Fu nction .............................................. 19 5
Re quirements ...................................... 197
Selecting .............................................. 197
Setting a speed .................................... 197
St oring a speed .................................... 197
Sy stem limitations ...............................1 95
Cup holder Rear ben chseat ................................... 121
Cup holder in the centre console
In stalling/removing ............................ .120
ins talling/ removing (auto matic
transmission) ....................................... 12 0 D
Damage de tection (pa rked vehicle) .......182
Dashboard see Cockpit
Dashboard lighting see Instrument lighting
Data acquisition Vehicle .................................................. 29 Data import/export
................................ 293
Fu nction/no tes ................................... 293
Importing/exporting ........................... 294
Data storage
Electronic control units ........................ .29
Online services ...................................... 30
Ve hicle .................................................. 29
Date Setting the time and date automati‐
cally ..................................................... 288
Deactivating the alarm (A TA).................... 97
Deale rship
see Qualified speciali stwo rkshop
Declaration of conformity Electromagnetic compatibility ............... 25
Jack .......................................................25
TIREFIT kit ............................................. 26
Wi reless vehicle components ................25
Decorative foil (cleaning instructions)
.................................................................. .399
DeNO x agent
see AdBlue ® Index
549

0049Au
tomatic driving lights inoper‐
ative .................................................... 524
Au xilia rybattery malfunction .............. 506
0044Before starting the engine, turn
th esteering wheel. .............................. 508
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ...................... 486
Blind Spot Assist inope rative ............... 487
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...4 90
Brake immediate ly............................... 472
Cann otstart engine See Owner's
Manual ................................................ 498
00AFChan gekey bat teries ...................5 15
004D Check brake fluid le vel................ 477
Check brake pads See Owner's Man‐
ual ...................................................... .485
00B2Che ckeng. oil le v.when next
re fuelling ............................................. 502 00CAChe
cktrailer hitch lo ck(white
display message) .................................5 17
Check tyre pressures then restart
Ru n Flat Indicator ................................. 513
0077 Check tyre(s) ................................ 511
003A Clean the fuel filter .................... .496
0058 Close boot sepa rator .................. 523
Clutch overheated Avoid pulling away
fo r XX:XX mins ..................................... 507
0059 Convertible Top Operation pos‐
sible to60 km/h ................................. 522
00ACCoolant Stop vehicle Switch
engine off ............................................ 498
Cruise contro l and Limiter inope ra‐
tive ...................................................... 493
Cruise control inope rative ................... 493
Cruise control off ................................ 493
0025cu rrently unavailable See Own‐
er's Manual .......................................... 47800E5
currently una vailable See Own‐
er's Manual .......................................... 472
Dep ress clutch fully tostart engine .....5 07
00B3 Engine oil le vel cannot be
measured ............................................ 500
00B2Engine oil le velRe duce oil le vel...5 00
00B2Engine oil le velSt op vehicle
Switch engine off ................................. 501
00B2Engine oil pressure Stop Switch
off engine ............................................ 501
Fa ult Drive at max. 80 km/h ...............490
0075Fr ont left malfunction Consult
wo rkshop (Example) ............................4 83
006FFr ont left seat backrest not
loc ked (Example) .................................. 519
Fr ont-passenger airbag disabled See
Owner's Manual ..................................4 82
Fr ont-passenger airbag enabled See
Owner's Manual ................................... 481552
Index

,Re
placekey See Owner's Man‐
ual ........................................................ 516
00AF Replace key ................................ .515
00B6 Reser vefuel le vel........................ 500
0075Re stra int sys. malfunction Con‐
sult workshop ...................................... 484
Re versing not poss. Consult work‐
shop ....................................................5 06
Risk of vehicle rolling Driver door
open and transmission not in P ...........508
Ru n Flat Indicator inope rative .............. 514
003D See Owner's Manual ................... 495
Speed limit (winter tyres) XXX km/h ... 494
00CCSt eering malfunction Incre ased
ph ysical ef fort See Owner's Manual .... 520
00CCSt eering malfunction See Own‐
er's Manual ......................................... 508
00CCSt eering malfunction Stop
immediately See Owner's Manual ........519 St
op vehicle Lea veengine running
Wa itTransmission cooling ...................505
003DSt opvehicle Lea veengine run‐
ning ..................................................... 496
003DSt opvehicle See Owner's Man‐
ual .......................................................4 97
00CC Stop vehicle Vehicle too low ........ 490
çsuspended ..................................4 92
0049Switch off lights .......................... 524
0049Switch on headla mps.................. 524
To shift out of P or N,depress brake
and start engine .................................. 506
0059 Top lo wering ............................... 522
00C8To p upAdBlue Perf.re duced in
XXX miles See Owner's Manual ...........505
00C8 Top up AdBlue Perf.re duced:
XXX km/h Nostart in XXX km ............ 504
To p up coolant See Owner ’sManual ... 496
00B2To p upwasher fluid .................... .521 Tr
af fic Sign Assi stCamera view
re stricted See Owner's Manual ........... 489
Tr af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ...................... 488
Tr af fic Sign Assi stinope rative ............. 488
00CATr ailer coupling extending… .........516
Tr ansmission Malfunction Stop ........... 505
0024Tu rnon the ignition torelease
th e parking brake ................................ 473
0077 Tyre press. monitor cur rently
una vailable .......................................... .512
0077 Tyre press. monitor inoperative
No wheel sensors ................................ 512
0077 Tyre press. monitor inoperative ...512
Ty re pressure Check tyres ...................509
Ty re(s) ove rheated ...............................5 13
00CC Vehicle rising Please wait............ 486
00CCVe hiclerising ...............................4 89
0077Wa rning tyre defect .....................510
0077 Wheel sensor(s) missing ..............512 554
Index