MERCEDES-BENZ C-CLASS CABRIOLET 2021 Owners Manual

Display messages
Possible causes/consequences and M
MSolutions
8 Reserve fuel level *T
he fuel supply has dropped into there ser verange. #
Refuel.
!
Clean the fuel filter *
Ve hicles with diesel engines: the fuel filter is dirty or thewate r inthe fuel filter needs tobe drained. #
Consult a qualified specialist workshop.
¸ Replace air cleaner *
Ve hicles with diesel engines: the engine air filter is dirty and must be replaced. #
Consult a qualified specialist workshop. Tr
ansmission Display messages
Possible causes/consequences and M
MSolutions
Only select Park (P) when
vehicle is stationary *
It is possible toselect the park position jonly if theve hicle is stationar y. #
Tostop, depress the brake pedal. 448
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions #
Shift the transmission topark position jwhen theve hicle is stationar y.
Apply brake to deselect
Park (P) position *
Yo u ha veattem ptedto shift the transmission out of park position jand into ano ther transmission position. #
Depress the brake pedal. #
Select transmission position h,kor neutral i.
To shift out of P or N,
depress brake and start
engine *
Yo u ha veattem ptedto shift the transmission out of park position jor neutral iand into ano ther transmission
position. #
Depress the brake pedal. #
Start theve hicle. #
Change the transmission position.
Apply brake to select R *
You ha veattem ptedto select transmission position k. #
Depress the brake pedal. #
Select transmission position k.
Risk of vehicle rolling
Driver door open and trans-
mission not in P *
The driver's door is not fully closed and transmission position h,kor neutral iis selected.
The vehicle may rollaw ay. #
Select pa rkposition jwhen switching off theve hicle.
N permanently active Risk
of vehicle rolling *
While theve hicle is rolling or while you are driving, neutral ihas been en gage d. #
Tostop, depress the brake pedal. Display messages and
warning/indicator lamps 449

Display messages
Possible causes/consequences and M
MSolutions #
Shift the transmission topark position jwhile theve hicle is stationar y. #
Tocontinue driving, select transmission position hork.
Without changing gear,
consult workshop *T
he transmission is malfunctioning. It is no longer possible tochange the transmission position. #
If transmission position his selected, consult a qualified specialist workshop and do not change the transmis‐
sion position. #
For all other transmission positions, park theve hicle safely. #
Consult a qualified specialist workshop.
Reversing not poss. Con-
sult workshop *
The transmission is malfunctioning. It is not possible toselect transmission position k. #
Consult a qualified specialist workshop.
Transmission Malfunction
Stop *
The transmission is malfunctioning. The transmission shifts toneutral iautomatically. #
Stop theve hicle immediately in accordance with the traf fic conditions. #
Depress the brake pedal. #
Enga gepark position j. #
Consult a qualified specialist workshop.
Stop vehicle Leave engine
running Wait Transmission
cooling *T
he transmission is overheating. Pulling away may be temp orarily impaired or not possible. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Lea vethe engine running. #
Wait until the display message disappears before pulling away. 450
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
Auxiliary battery malfunc-
tion (white display mes‐
sage) *T
he auxiliary batteryforth e transmission is no longer being charge d. #
Consult a qualified specialist workshop. #
Untilthen, alw ays select park position jmanually before you swit choff the engine. #
Before leaving theve hicle, apply the electric parking brake.
Auxiliary battery malfunc-
tion (red display message) *T
he auxiliary batteryforth e transmission is no longer being charge d. #
Consult a qualified specialist workshop. #
Untilthen, alw ays select park position jmanually before you swit choff the engine. #
Before leaving theve hicle, apply the electric parking brake. Brakes
Display messages
Possible causes/consequences and M MSolutions
! Parking brake See Owner's
Manual *
The yellow ! indicator lamp is lit. The elect ric pa rking brake is malfunctioning.
To appl y: #
Switch the ignition off and switch it back on. #
Apply the electric parking brake manually (/ page166).
If it is not possible toapply the electric parking brake: #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 451

Display messages
Possible causes/consequences and M
MSolutions #
Where necessar y,also secure the par kedve hicle against rolling away.
* The yellow ! indicator lamp and there d! indicator lamp are lit. The elect ric pa rking brake is malfunction‐
ing.
To release: #
Swit chthe ignition off and switch it back on. #
Release the electric parking brake manually (/ page166).
or #
Release the electric parking brake automatically (/ page165).
If it is still not possible torelease the electric parking brake: #
Do not continue driving. Consult a qualified specialist workshop.
* The yellow ! indicator lamp is lit and there d! indicator lamp is flashing. The electric parking brake is mal‐
functioning.
The electric parking brake could not be applied or released. #
Swit chthe ignition off and switch it back on.
To appl y: #
Release and then apply the electric parking brake manually (/ page166).
To release: #
Apply and then release the electric parking brake manuall y.452
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
If it is not possible toapply the electric parking brake or there d! indicator lamp continues toflash: #
Do not continue driving. Consult a qualified specialist workshop. #
Where necessar y,also secure the par kedve hicle against rolling away.
* The yellow ! indicator lamp is lit and there d! indicator lamp flashes for appro ximately ten seconds af ter
th e electric parking brake has been applied or released. It then remains lit or goes out. The electric parking brake is
malfunctioning.
If th est ate of charge istoo lo w: #
Char gethe12 V batter y.
To appl y: #
Switch the ignition off.
The electric parking brake will be applied automaticall y.
If yo u do not wantthe electric parking brake tobe applied, e.g. at an automatic car wash or when theve hicle is
being towe d, lea vethe ignition switched on. This does not include having theve hicle towe d with there ar axle
ra ised.
If th e electric parking brake is not applied automatically: #
Switch the ignition off and switch it back on. #
Release and then apply the electric parking brake manually (/ page166).
If it is still not possible toapply the electric parking brake: Display messages and
warning/indicator lamps 453

Display messages
Possible causes/consequences and M
MSolutions #
Consult a qualified specialist workshop. #
Where necessar y,also secure the par kedve hicle against rolling away.
To release: #
Ifth e conditions for auto matic release are fulfilled and the electric parking brake is not released automaticall y,
re lease the electric parking brake manually (/ page166).
If it is still not possible torelease the electric parking brake: #
Do not continue driving. Consult a qualified specialist workshop.
! Release parking brake *
The red! indicator lamp is flashing.
The electric parking brake is applied while you are driving:
R A condition for auto matic release of the electric parking brake has not been fulfilled (/ page165).
R You are per form ing emer gency braking using the electric parking brake (/ page166). #
Che ckthe conditions for auto matic release of the electric parking brake. #
Release the electric parking brake manually. 454
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
! Turn on the ignition to
release the parking brake *
The red! indicator lamp is lit.
Yo u ha veattem ptedto release the electric parking brake with the ignition switched off. #
Switch on the ignition.
J Check brake fluid level *T
here is insuf ficient brake fluid in the brake fluid reser voir. &
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. #
Stop theve hicle as soon as possible, paying attention toroad and traf fic conditions. Do not continue driv‐
ing. #
Consult a qualified specialist workshop. #
Do not top up the brake fluid. Check brake pads See
Owner's Manual
*T
he brakepads ha vereached thewe ar limit. #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 455

Driving sy
stems Display messages
Possible causes/consequences and M
MSolutions
ë Off *T
he HOLD function is deactivated because theve hicle is slipping or a condition for activation is not fulfilled. #
Reactivate the HOLD function later or check the activation conditions forth e HOLD function (/ page173).
é ATTENTION ASSIST inoper-
ative *A
TTENTION ASSIST is malfunctioning. #
Consult a qualified specialist workshop.
é ATTENTION ASSIST: Take a
break! *A
TTENTION ASSIST has de tected fatigue or an increasing la ckof concentration on the part of the driver
(/ page 174). #
If necessa ry,ta ke a break. 456
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
¯ - - -km/h *C
ruise control cannot be activated as not all activation conditions are fulfilled. #
Obser vethe activation conditions for cruise control (/ page177).
Cruise control inoperative *C
ruise control is malfunctioning. #
Consult a qualified specialist workshop.
Cruise control and Limiter
inoperative *C
ruise control and the limiter are malfunctioning. #
Consult a qualified specialist workshop.
Cruise control off *C
ruise control has been deactivated.
If th ere is an additional warning tone, cruise control has been deacti vated automatically (/ page176).
È
- - - km/h *T
he limiter can temp orarily not be engaged. Once the cause of the problem is no longer present, the sy stem will be
av ailable again.
Limiter passive *I
fyo u depress the accelera tor pedal be yond the pressure point (kickdown), the limiter is switched topassive mode
(/ page 177).
Limiter inoperative *T
he limiter is malfunctioning. #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 457