2014 MERCEDES-BENZ C-CLASS SALOON engine

Display messages
Possible causes/consequences and
M
MSolutions Blind Spot Assist
Blind Spot Assist
currently unavail‐ currently unavail‐
able See Owner's able See Owner's
Manual Manual
orActive
Active
Blind Spot Assist
Blind Spot Assist
currently unavail‐ currently unavail‐
able See Owner's able See Owner's
Manual Manual Blind Spot Assist or Active Blind Spot Assist is temporarily inop-
erative. Possible causes:
R the function is impaired due to heavy rain or snow
R the radar sensor system is outside the operating temperature
range
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation
Once the causes listed above no longer apply, the display message goes out.
Blind Spot Assist or Active Blind Spot Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle to prevent it from rolling away (Y page 207).
X Restart the engine. Blind Spot Assist Blind Spot Assist
not not
available
available when
when
towing a trailer
towing a trailer
See See Owner's
Owner's Manual
Manual
or Active Blind
Active Blind
Spot Assist not
Spot Assist not
available available when
whentow‐
tow‐
ing a trailer See
ing a trailer See
Owner's Manual Owner's Manual Blind Spot Assist or Active Blind Spot Assist is deactivated while
towing a trailer.
You have established the electrical connection between the trailer
and your vehicle.
X Press aon the steering wheel to confirm the display mes-
sage. Blind Spot Assist Blind Spot Assist
inoperative inoperative
or
Active Blind Spot
Active Blind Spot
Assist inoperative Assist inoperative Blind Spot Assist or Active Blind Spot Assist is faulty.
X Visit a qualified specialist workshop. Park
Park
Assist
Assist cancel‐
cancel‐
led
led The driver's door is open.
X Repeat the parking gap measurement and parking process with
the driver's door closed. You touched the multifunction steering wheel while steering inter-
vention was active.
X While steering intervention is active, make sure not to touch the
multifunction steering wheel. The vehicle has started to skid and ESP
®
has intervened.
X Use Active Parking Assist again later (Y page 239). Display
messages
339On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Park
Park
Assist
Assist inoper‐
inoper‐
ative
ative PARKTRONIC is malfunctioning or faulty.
X Follow the instructions and helpful hints in the "Problems with
PARKTRONIC" section (Y page 239).
If the display message continues to be displayed: X Visit a qualified specialist workshop. Active Parking Assist is unavailable or faulty.
X Switch off the ignition and restart the engine.
If Active Parking Assist continues to be unavailable (the jsymbol
is not shown in the multifunction display):
X Visit a qualified specialist workshop. Traffic Sign Traffic Sign
Assist currently Assist currently
unavailable See unavailable See
Owner's Manual Owner's Manual Traffic Sign Assist is temporarily inoperative.
Possible causes:
R the windscreen is dirty in the camera's field of vision
R visibility is impaired due to heavy rain, snow or fog
X Clean the windscreen.
If the system detects that the camera is fully operational, the dis-
play message disappears.
Traffic Sign Assist is operational again. Traffic Sign Traffic Sign
Assist inoperative Assist inoperative Traffic Sign Assist is faulty.
X Visit a qualified specialist workshop. ë
Off Off The HOLD function is deactivated. The vehicle is skidding.
A warning tone also sounds.
X Reactivate the HOLD function later (Y page 232). The HOLD function is deactivated. When the brake pedal is firmly
depressed, an activation condition is not fulfilled.
A warning tone also sounds.
X Check the activation conditions for the HOLD function
(Y page 232). DISTRONIC PLUS off DISTRONIC PLUS off DISTRONIC PLUS has been deactivated (Y
page 222).
If it was not deactivated by the driver, a warning tone also sounds. DISTRONIC PLUS
DISTRONIC PLUS
available again available again DISTRONIC PLUS is operational again after having been tempo-
rarily unavailable. You can now reactivate DISTRONIC PLUS
(Y
page 222). 340
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions DISTRONIC
DISTRONIC
PLUS
PLUScur‐
cur‐
rently
rently unavailable
unavailable
See Owner's Manual
See Owner's Manual DISTRONIC PLUS is temporarily inoperative.
DISTRONIC PLUS Steering Assist and Stop&Go Pilot are also tem-
porarily inoperative.
Possible causes:
R the function is impaired due to heavy rain or snow
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation
R the system is outside the operating temperature range
R the on-board voltage is too low
A warning tone also sounds.
Once the causes listed above no longer apply, the display message goes out.
DISTRONIC PLUS is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 207).
X Restart the engine. DISTRONIC PLUS DISTRONIC PLUS
inoperative inoperative DISTRONIC PLUS is faulty.
The following may have also failed:
R BAS PLUS with Cross-Traffic Assist
R PRE-SAFE ®
Brake
R DISTRONIC PLUS with Steering Assist and Stop&Go Pilot
A warning tone also sounds.
X Visit a qualified specialist workshop. DISTRONIC DISTRONIC
PLUS
PLUSsus‐
sus‐
pended
pended You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
X Remove your foot from the accelerator pedal. DISTRONIC PLUS
DISTRONIC PLUS
- - - mph - - - mph An activation condition for DISTRONIC PLUS is not fulfilled.
X Check the activation conditions for DISTRONIC PLUS
(Y page 222). DISTRONIC
DISTRONIC
PLUS
PLUSand
and
SPEEDTRONIC inop‐
SPEEDTRONIC inop‐
erative erative DISTRONIC PLUS and SPEEDTRONIC are faulty. A warning tone
also sounds.
X Visit a qualified specialist workshop. Display
messages
341On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Tyre press. moni‐
Tyre press. moni‐
tor currently tor currently
unavailable unavailable Due to a source of radio interference, no signals can be received
from the wheel sensors. The tyre pressure monitor is temporarily
malfunctioning.
X Drive on.
The tyre pressure monitor restarts automatically as soon as the
cause has been rectified. Wheel sensor(s) Wheel sensor(s)
missing missing There is no signal from the tyre pressure sensor of one or several
wheels. The pressure of the affected tyre is not displayed in the
multifunction display.
X Have the faulty tyre pressure sensor replaced at a qualified spe-
cialist workshop. Tyre press. moni‐ Tyre press. moni‐
tor tor
inoperative
inoperative No
No
wheel sensors
wheel sensors The wheels fitted do not have suitable tyre pressure sensors. The
tyre pressure monitor is deactivated.
X Fit wheels with suitable tyre pressure sensors.
The tyre pressure monitor is activated automatically after driv-
ing for a few minutes. Tyre press. moni‐ Tyre press. moni‐
tor inoperative tor inoperative The tyre pressure monitor is faulty.
X Visit a qualified specialist workshop. Vehicle
Display messages
Possible causes/consequences and
M
MSolutions To start engine,
To start engine,
shift to either P shift to either P
or N or N You have attempted to start the engine with the transmission in
position
Ror D.
X Shift the transmission to position Por N. Auxiliary battery Auxiliary battery
malfunction malfunction The auxiliary battery for the transmission is no longer being
charged.
X Visit a qualified specialist workshop. Apply brake to Apply brake to
deselect Park (P) deselect Park (P)
position position You have attempted to move the transmission selector lever to
position
D,Ror Nwithout depressing the brake pedal.
X Depress the brake pedal. Display
messages
345On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Risk of vehicle
Risk of vehicle
rolling Transmis‐ rolling Transmis‐
sion not in P sion not in P The driver's door is open and the transmission is in position
R,Nor
D.
A warning tone also sounds.
G WARNING
The vehicle may roll away.
There is a risk of an accident. X Shift the transmission to position P.
X Secure the vehicle against rolling away (Y page 207).Without changing Without changing
gear, gear,
consult
consult work‐
work‐
shop
shop You cannot change the transmission position due to a malfunction.
A warning tone also sounds.
If transmission position Dis selected:
X Drive to a qualified specialist workshop without shifting the
transmission from position D.
If transmission position R,Nor Pis selected:
X Consult a qualified specialist workshop. Only select Park Only select Park
(P) when vehicle (P) when vehicle
is stationary is stationary The vehicle is moving.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Shift the transmission to position P.Clutch overheated Clutch overheated
Avoid Avoid
pulling
pulling away
away
Engage/disengage
Engage/disengage
clutch quickly if clutch quickly if
req. req. The clutch is under considerable load and the permitted operating
temperature has been exceeded. A warning tone also sounds.
Avoid frequent pulling away and driving at walking pace over lon-
ger distances.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 207).
X Leave the engine running.
The clutch is cooled more quickly with the engine running.
or X If possible, continue driving at a steady speed.
X Remove your foot from the clutch pedal and do not allow the
clutch to slip.
The clutch may also cool down during the journey.
It may take several minutes for it to cool down. When the clutch
has cooled down, the display message disappears. The clutch is
fully operational again. 346
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions N The boot lid is open.
X Close the boot lid. M
M The bonnet is open. A warning tone also sounds.
G WARNING
The open bonnet may then block your view when the vehicle is in
motion.
There is a risk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 207).
X Close the bonnet. Active bonnet mal‐ Active bonnet mal‐
function See Own‐ function See Own‐
er's Manual er's Manual The active bonnet (pedestrian protection) is not active due to a
malfunction or because it has already been triggered.
X Visit a qualified specialist workshop. C C At least one door is open. A warning tone also sounds.
X Close all doors. _
Rear left seat Rear left seat
backrest not backrest not
locked locked
orRear
Rear
right seat back‐
right seat back‐
rest not locked
rest not locked Saloon with through-loading feature in the rear bench seat:
The backrest in the rear is not engaged on the left-hand and/or
right-hand side.
X Push the backrest back until it engages. _
Rear centre back‐ Rear centre back‐
rest not locked rest not locked Saloon with through-loading facility in the rear compartment:
The centre rear seat backrest is not engaged.
X Push the backrest back until it engages. j
Check trailer Check trailer
hitch lock hitch lock The trailer tow hitch is not correctly engaged.
A warning tone also sounds.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 207).
X Engage the trailer coupling's ball coupling in the end position
(Y page 285). Display
messages
347On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions &
Pre-entry climate Pre-entry climate
control (via key) control (via key)
available again available again
after engine start after engine start Hybrid vehicles: with the engine switched off, you have attempted
to switch on the pre-entry climate control more than twice.
X Let the engine run for ten seconds.
After running the engine, the pre-entry climate control is opera-
tional again. &
Pre-entry climate Pre-entry climate
control (via key) control (via key)
inoperative inoperative
HV
HVbat‐
bat‐
tery low
tery low Hybrid vehicles: the on-board voltage is too low.
The pre-entry climate control cannot be switched on.
X Drive for a considerable distance.
The battery charges. The pre-entry climate control is operational
again as soon as the on-board electrical system voltage is suf-
ficient. &
Function Function
available
available
again
again after
afterengine
engine
start
start Vehicles with BlueEFFICIENCY package: you have attempted to
switch on the pre-entry climate control (eHeat/eVent) more than
3 times with the engine switched off.
X Let the engine run for ten seconds.
After running the engine, the pre-entry climate control is opera- tional again. &
inoperative Bat‐ inoperative Bat‐
tery low tery low The on-board voltage is too low.
The auxiliary heating (Y
page 172) has switched itself off. The
auxiliary heating or pre-entry climate control (eHeat/eVent) can-
not be switched on.
X Drive for a considerable distance.
The battery charges. The auxiliary heating or the auxiliary cli-
mate control ("eHeat/eVent" function) is operational again as
soon as the on-board electrical system voltage is sufficient. &
inoperative inoperative
Refuel
Refuel
vehicle
vehicle There is too little fuel in the fuel tank. The auxiliary heating cannot
be switched on (Y page 172).
X Refuel at the nearest filling station. &
inoperative See inoperative See
Owner's Man. Owner's Man. The auxiliary heating is temporarily malfunctioning or faulty.
X When the vehicle is on a level surface and the engine has cooled
down, make up to four attempts to switch on the auxiliary heat- ing, waiting several minutes between each attempt
(Y page 172).
X If the auxiliary heating does not switch on, consult a qualified
specialist workshop. 348
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Ð
Power Power
steering
steering mal‐
mal‐
function See Own‐
function See Own‐
er's Manual er's Manual The power steering assistance is faulty.
A warning tone also sounds.
G WARNING
You will need to use more force to steer.
There is a risk of an accident. X Check whether you are able to apply the extra force required.
X If you are able to steer safely: carefully drive on to a qualified
specialist workshop.
X If you are unable to steer safely: do not drive on. Contact the
nearest qualified specialist workshop. Ð
Steering malfunc‐ Steering malfunc‐
tion See Owner's tion See Owner's
Manual Manual The electric steering lock is malfunctioning.
G WARNING
The steering may be locked by the electric steering lock.
There is a risk of an accident. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 207).
X Do not drive on and consult the nearest qualified specialist
workshop. _
Before starting Before starting
the engine, turn the engine, turn
the the
steering
steering wheel.
wheel. The electric steering lock was unable to unlock the steering.
X Remove the key from the ignition lock.
X To unlock the steering, move the steering wheel slightly.
X Insert the key into the ignition lock again. Telephone No ser‐
Telephone No ser‐
vice vice Your vehicle is outside the network provider's transmitter/
receiver range.
X Wait until the mobile phone operational readiness symbol
appears in the multifunction display. ¥
Top Top
up
upwasher
washer fluid
fluid The washer fluid level in the washer fluid reservoir has dropped
below the minimum.
X Top up the washer fluid (Y page 394). Display
messages
349On-board computer and displays Z