2018 MERCEDES-BENZ C-CLASS CABRIOLET engine

Display messages
Possible causes/consequences and 0050
0050Solutions
, Replace key See Owner's
Manual *
Ve hicles with a digital vehicle key:only a few or no authorisations remain forst arting the engine. 0007
Make sure that the internet connection is not limited bycer tain mobile phone settings. 0007
Open the Mercedes me connect http://www.mercedes.me and call up the digital vehicle key service. 0007
Deactivate the service firs t and then activate it again. 0007
Ifth e display message still appears, con tact the Mercedes-Benz Cus tomer Assis tance Center (C AC).
Ve hicles with a digital vehicle keyst icke r:on lyafe w or no authorisations remain forst arting the engine. 0007
Order a new digital vehicle keyst icke r from a Mercedes-Benz Service Centre or at http://www.mercedes-
benz.com/connect. Ve
hicle Display messages
Possible causes/consequences and 0050 0050Solutions
00CA Trailer coupling extending… *E
xtending or retracting the ball nec k.
Do not attem pttospeed up, slow down or initiate there tracting or extending process using your hand, foot or other
aids. During there tracting or extending process, do not couple a traile r.
When the ball neck has reached an operational position, the display message disappears.
00CA *
Yo u ha veattem pted todisplace the ball neck and the transmission is in position 005E,005Cor005B. 0007
Depress the brake pedal. 0007
Shift the transmission toposition 005D. 516
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions
Operation only possible in
transmission position P
00CA
Operation only possible in
transmission position N *
Ve hicles with manual transmission: you attem ptedto swivel the ball neck and the transmission is not in neutral
005C. 0007
Shift the transmission toneutral 005C.
00CA Check trailer hitch lock
(whi tedisplay message) *T
he trailer tow hit chis not operational when you are driving with a trailer. 0007
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. 0007
Uncouple the trailer and secure it against rolling away. 0007
Initiate a new swivelling procedure (0013 page243). 0007
Ifth e ball neck is extended, press and hold the button on the boot lid until the ball neck engages beneath the
bumper. 0007
When the display message disappears, couple up the trailer and drive on. 000A
WARNING Risk of an accident if the ball neck is not loc ked
If th e ball neck is not in the loc ked position, the trailer may come loose. 0007
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions.
Do not continue driving under any circums tances. Display messa
ges and warning/indicator lamps 517

Display messages
Possible causes/consequences and 0050
0050Solutions 0007
Consult a qualified specialist workshop.
00CC Steering malfunction
Increased physical effort
See Owner's Manual *T
he po wer assi stance forth esteering is malfunctioning. 000A
WARNING Risk of an accident due toaltered steering characteristics
If th e po wer assi stance of thesteering fails partially or comple tely, you will need touse more forc eto steer. 0007
If safe steering is possible, drive on carefully. 0007
Visit or consult a qualified specialist workshop immediatel y. 0007
If safe steering is possible, drive on carefully. 0007
Visit or consult a qualified specialist workshop immediatel y.
Active bonnet malfunction
See Owner's Manual *T
he active bonnet (pedestrian pr otection) is malfunctioning or inoperative af ter having already been triggered. 0007
Consult a qualified specialist workshop.
0083 *T
he bonnet is open. 000A
WARNING Risk of accident due todriving with the engine bonn etunlo cked
An unloc ked engine bonn etmay open up when theve hicle is in motion and block your vie w. 0007
Never unlock the engine bonn etwhen driving. 0007
Before every trip, ensure that the engine bonn etis loc ked. 520
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions 0007
Stop theve hicle immediately, paying attention toroad and traf fic conditions. 0007
Close the bonn et.
0051 *A
t least one door is open. 0007
Close all doors.
0084 *T
he boot lid is open. 000A
DANG ER Risk of exhaust gas poisoning
Combustion engines emit poisonous exhaust gases such as carbon monoxide. Exhaust gases can enter the
ve hicle interior if the boot lid is open when the engine is running, especially if theve hicle is in motion. 0007
Alw ays switch off the engine before opening the boot lid. 0007
Never drive with the boot lid open. 0007
Close the boot lid.
00B2 Top up washer fluid *T
hewasher fluid le vel in thewa sher fluid reser voir has dropped below the minimum. 0007
Top up thewa sher fluid (0013 page 395). Display messages and
warning/indicator lamps 521

Soft
top Display messages
Possible causes/consequences and 0050
0050Solutions
0059 12 V battery See Owner's
Manual *T
he on-board electrical sy stem voltage is too lo w. 0007
Start the engine.
0059
Open/close top completely *T
he soft top is not loc ked. If you drive at speeds of more than 60 km/h you cannot open or close the soft top. 0007
Do not drive at speeds greater than 60 km/h. 0007
Fully open or close the soft top.
0059 Top lowering *T
he soft top is not fully opened or closed. The hydraulics are depressuring. 0007
Fully open or close the soft top.
0059 Convertible Top Operation
possible to 60 km/h *I
fyo u drive at speeds of more than 60 km/h you cannot open or close the soft top. 0007
Do not drive at speeds greater than 60 km/h. 0007
Fully open or close the soft top. 522
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions
Once the cause of the problem is no longer present, driving sy stems and driving saf ety sy stems will be available
again.
If th e display message does not disappear: 0007
Pull over and stop theve hicle, paying attention toroad and traf fic conditions. 0007
Clean the windscreen. Wa
rning and indicator lamps Overview of
warning and indicator lamps Some sy
stems will per form a self-test when the
ignition is switched on. Some warning and indi‐
cator lamps may brief lylight up or flash. This
behaviour is non-critical. These warning and indi‐
cator lamps indicate a malfunction only if they
light up or flash af terth e engine has been star‐
te d or during a journe y. Instrument display (standard) Instrument display in
the widescreen cockpit Wa
rning and indicator lamps:
0058 Low beam (0013
page127)
0060 St
anding lights (0013 page127) Displ
aymessa ges and warning/indicator lamps 527

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 000A
WARNING Risk of accident and inju ryif brake forc e boosting is malfunctioning
If brake forc e boosting is malfunctioning, increased brake pedal forc e may be necessary for braking. The braking
ch aracteristics may be impaired. The braking dis tance can increase in emergency braking situations. 0007
Stop in a safe location immediately. Do not continue driving! 0007
Consult a qualified specialist workshop. 000A
WARNING Risk of an accident due tolow brake fluid le vel
If th e brake fluid le vel is too lo w,the braking ef fect and the braking characteristics may be impaired. 0007
Stop theve hicle as soon as possible, paying attention toroad and traf fic conditions. Do not continue driving. 0007
Consult a qualified specialist workshop. 0007
Do not top up the brake fluid. 0007
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances. 0007
Obser vethe messages on the multifunction displa y. 0007
Consult a qualified specialist workshop.
0025 The
yellow ABS warning lamp is lit while the engine is running.
ABS is malfunctioning.
If th ere is an additional warning tone, EBD is malfunctioning. Display messa
ges and warning/indicator lamps 529