ECU MERCEDES-BENZ CLA 2013 Owner's Guide
[x] Cancel search | Manufacturer: MERCEDES-BENZ, Model Year: 2013, Model line: CLA, Model: MERCEDES-BENZ CLA 2013Pages: 352, PDF Size: 5.37 MB
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XPress the ball coupling in the direction of
the arrow until it engages behind the
bumper.
Indicator lamp ? goes out and the mes-
sage in the multifunction display disap-
pears.
Trailer power supply
! You can connect accessories with a
power rating of up to 240 W to the perma-
nent power supply and with a power rating
of up to 180 W to the power supply that is
switched on via the ignition lock.
The trailer battery may not be charged from
the power supply.
XTo switch the connected power supply
on or off: turn the key in the ignition lock
to position 2 or 0 respectively.
When it leaves the factory, your vehicle's
trailer socket is equipped with a permanent
power supply and a power supply that is
switched on via the ignition lock.
The permanent power supply is supplied via
trailer socket pin 9.
The power supply that is switched on via the
ignition lock is supplied via trailer socket pin
10.
The trailer's permanent power supply is
switched off in the event of low vehicle supply
voltage and after six hours at the latest.
You can find more information about instal-
ling the trailer electrics at a qualified special-
ist workshop.
Bulb failure indicator for LED lamps
i If LED lamps are fitted in the trailer, an
error message may appear in the multi-
function display even if there is no fault. The
reason for the error message could be that
the current has fallen below the minimum
of 50 mA.
To ensure reliable operation of the bulb failure
indicator, each LED chain in the trailer lighting
must be guaranteed a minimum current of
50 mA.
Trailer with 7-pin connector
General notes
Trailers with 7-pin connector: you can
make a connection to the 13-pin connector
on the ball coupling using an adapter plug or,
if necessary, an adapter cable. Both can be
obtained in a qualified specialist workshop.
Fitting the adapter
! Make sure that there is sufficient cable
play so that the cable cannot become
detached when cornering.
! Remove the installed adapter cable
before folding in the ball coupling. Other-
wise, damage may occur to the rear
bumper and the adapter cable.
XOpen the socket cover.XInsert connector with lug : into
groove ; of the socket. Turn the connec-
tor clockwise to the stop.XLet the cover engage.XIf you are using an adapter cable, secure
the cable to the trailer with cable ties.206Towing a trailerDriving and parking
Page 233 of 352
Display messagesPossible causes/consequences and M SolutionsThe red ! indicator lamp flashes and the yellow ! warning
lamp is lit.
The electric parking brake is malfunctioning.
To release:XSwitch off the ignition and turn it back on.XRelease the electric parking brake manually.
To apply:
XSwitch off the ignition and turn it back on.XApply the electric parking brake manually.
If the red ! indicator lamp continues to flash:
XDo not drive on.XSecure the vehicle against rolling away ( Y page 326).XMove the transmission selector lever to P.XTurn the front wheels towards the kerb.XConsult a qualified specialist workshop.The yellow ! warning lamp lights up. The red ! indicator
lamp flashes for about ten seconds after the electric parking brake
has been applied or released. It then goes out or remains lit.
The electric parking brake is malfunctioning.XSwitch off the ignition and turn it back on.XApply the electric parking brake.
If it is not possible to apply the electric parking brake:
XMove the transmission selector lever to P.XVisit a qualified specialist workshop.
If it is not possible to release the electric parking brake:
XRelease the electric parking brake automatically ( Y page 163).
If the electric parking brake still cannot be released:
XConsult a qualified specialist workshop.The yellow ! warning lamp lights up. If you manually apply or
release the electric parking brake, the red ! indicator lamp
flashes.
The electric parking brake is malfunctioning. It is not possible to
apply the electric parking brake manually.XMove the transmission selector lever to P.XVisit a qualified specialist workshop.Display messages231On-board computer and displaysZ
Page 234 of 352
Display messagesPossible causes/consequences and M Solutions!
Parking brake inop‐
erativeThe yellow ! warning lamp lights up. The red ! indicator
lamp flashes for about ten seconds after the electric parking brake
has been applied or released. It then goes out or remains lit.
The electric parking brake is malfunctioning, e.g. because of over-
voltage or undervoltage.XRectify the cause of the overvoltage or undervoltage, e.g. by
charging the battery or restarting the engine.XApply or release the electric parking brake.
If it remains impossible to apply or release the electric parking
brake:
XSwitch off the ignition and turn it back on.XApply or release the electric parking brake.
If the electric parking brake still cannot be released:
XConsult a qualified specialist workshop.The display message is only shown while the vehicle is in motion.
The red ! indicator lamp flashes and the yellow ! warning
lamp is lit.
It is not possible to apply the electric parking brake manually.XMove the transmission selector lever to P.XVisit a qualified specialist workshop.!
Turn on the igni‐
tion to release
the parking brakeThe red ! indicator lamp lights up.
You attempted to release the electric parking brake while the igni-
tion was switched off.XTurn the key to position 1 in the ignition lock.J
Brake immediatelyVehicles with manual transmission: a malfunction has occurred
while the HOLD function was activated.
A tone may also sound at regular intervals. If you attempt to lock
the vehicle, the tone becomes louder.
You cannot start the engine.XPaying attention to the traffic situation, immediately depress the
brake pedal firmly and hold until the display message disap-
pears.XSecure the vehicle against rolling away ( Y page 162).
You can restart the engine.232Display messagesOn-board computer and displays
Page 235 of 352
Display messagesPossible causes/consequences and M SolutionsJ
Check brake fluid
levelThere is insufficient brake fluid in the brake fluid reservoir.
In addition, the red J warning lamp lights up in the instrument
cluster and a warning tone sounds.GWARNING
The braking efficiency may be impaired.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.XSecure the vehicle against rolling away ( Y page 162).XConsult a qualified specialist workshop.XDo not top up the brake fluid. This does not correct the fault.#
Check brake pad
wearThe brake pads/linings have reached their wear limit.XVisit a qualified specialist workshop.PRE-SAFE
inoperative See
Owner's ManualImportant functions of PRE-SAFE ®
have failed. All other occupant
safety systems, e.g. airbags, remain available.XVisit a qualified specialist workshop immediately.Collision Preven‐
tion Assist Plus
currently unavail‐
able See Owner's
ManualCOLLISION PREVENTION ASSIST PLUS is temporarily inoperative.
Possible causes:
R the radar sensor cover in the radiator trim is dirty.
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.
Once the causes listed above no longer apply, the display message
goes out.
COLLISION PREVENTION ASSIST PLUS is operational again.
If the display message does not disappear:XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XSecure the vehicle against rolling away ( Y page 162).XClean the radar sensor cover in the radiator grille
( Y page 291).XRestart the engine.Display messages233On-board computer and displaysZ
Page 236 of 352
Display messagesPossible causes/consequences and M SolutionsCollision Preven‐
tion Assist Plus
inoperativeCOLLISION PREVENTION ASSIST PLUS is malfunctioning. The dis-
tance warning signal may also have failed.XVisit a qualified specialist workshop.PRE-SAFE
Function currently
limited See Own‐
er's ManualAdaptive Brake Assist is temporarily inoperative. Possible causes:
R the front bumper is dirty.
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.
Once the causes listed above no longer apply, the display message
goes out.
Adaptive Brake Assist is operational again.
If the display message does not disappear:XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XSecure the vehicle against rolling away ( Y page 162).XClean the front bumper ( Y page 291).XRestart the engine.PRE-SAFE
Function limited
See Owner's ManualAdaptive Brake Assist is faulty. The distance warning signal may
also have failed.XVisit a qualified specialist workshop.üIf the symbol appears in the multifunction display, a seat belt
tongue has been inserted into a rear seat belt buckle.
Further information on the status indicator for the rear seat belts
( Y page 49).234Display messagesOn-board computer and displays
Page 243 of 352
Display messagesPossible causes/consequences and M Solutions?
Coolant Stop car,
turn engine offThe coolant is too hot.
A warning tone also sounds.GWARNING
Never drive with an overheated engine. Driving when your engine
is overheated can cause some fluids which may have leaked into
the engine compartment to catch fire.
Steam from an overheated engine can cause serious burns, which
can occur just by opening the bonnet.
There is a risk of injury.
XStop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.XSecure the vehicle against rolling away ( Y page 162).XWait until the engine has cooled down.XMake sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.XDo not start the engine again until the display message goes out
and the coolant temperature is below 120 †. The engine may
otherwise be damaged.XPay attention to the coolant temperature display.XIf the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 120 †.
#The battery is not being charged.
A warning tone also sounds.
Possible causes:
R faulty alternator
R torn poly-V-belt
R a malfunction in the electronicsXStop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.XOpen the bonnet.XCheck whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
XConsult a qualified specialist workshop.
If the poly-V-belt is OK:
XVisit a qualified specialist workshop immediately.Display messages241On-board computer and displaysZ
Page 246 of 352
Display messagesPossible causes/consequences and M SolutionsLane Keeping
Assist currently
unavailable See
Owner's ManualLane Keeping Assist is deactivated and 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.
R there are no lane markings for a longer period.
R the lane markings are worn, dark or covered, e.g. by dirt or snow.
Once the causes listed above no longer apply, the display message
goes out.
Lane Keeping Assist is operational again.
If the display message does not disappear:XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XSecure the vehicle against rolling away ( Y page 162).XClean the windscreen.Lane Keeping
Assist inoperativeLane Keeping Assist is faulty.XVisit a qualified specialist workshop.Blind Spot Assist
currently unavail‐
able See Owner's
ManualBlind Spot Assist is temporarily inoperative.
You have established the electrical connection between the trailer
and your vehicle.XPress a on the steering wheel to confirm the display mes-
sage.
Blind Spot Assist is deactivated while towing a trailer.
244Display messagesOn-board computer and displays
Page 247 of 352
Display messagesPossible causes/consequences and M SolutionsBlind Spot Assist is temporarily inoperative. Possible causes:
R the sensors are dirty.
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.
The yellow 9 indicator lamps also light up in the exterior mir-
rors.
Once the causes listed above no longer apply, the display message
goes out.
Blind Spot Assist is operational again.
If the display message does not disappear:XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XSecure the vehicle against rolling away ( Y page 162).XClean the sensors ( Y page 291).XRestart the engine.Blind Spot Assist
inoperativeBlind Spot Assist is faulty.
The yellow 9 indicator lamps also light up in the exterior mir-
rors.XVisit a qualified specialist workshop.Park Assist cancel‐
ledThe driver's door is open and the driver's seat belt has not been
fastened.XRepeat the parking process with the seat belt fastened and the
driver's door closed.You inadvertently touched the multifunction steering wheel while
steering intervention was active.XWhile steering intervention is active, make sure not to touch the
multifunction steering wheel.The vehicle has started to skid and ESP ®
has intervened.XUse Active Parking Assist again later ( Y page 186).Display messages245On-board computer and displaysZ
Page 248 of 352
Display messagesPossible causes/consequences and M SolutionsPark Assist inoper‐
ativeYou have just carried out a large number of turning or parking
manoeuvres.
Active Parking Assist will become available again after approx-
imately ten minutes ( Y page 186).XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XSwitch off and restart the engine.
If the display message continues to be displayed:
XVisit a qualified specialist workshop.PARKTRONIC is faulty.XVisit a qualified specialist workshop.DISTRONIC PLUS offDISTRONIC PLUS has been deactivated ( Y page 173). If it was
deactivated automatically, a warning tone also sounds.DISTRONIC PLUS
available againDISTRONIC PLUS is operational again after having been tempo-
rarily unavailable. You can now reactivate DISTRONIC PLUS
( Y page 173).DISTRONIC PLUS cur‐
rently unavailable
See Owner's ManualDISTRONIC PLUS is temporarily inoperative. Possible causes:
R the function is impaired due to heavy rain or snow.
R the sensors in the radiator trim are dirty
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 is operational again.
If the display message does not disappear:XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XSecure the vehicle against rolling away ( Y page 162).XClean the sensors in the radiator trim ( Y page 291).XRestart the engine.246Display messagesOn-board computer and displays
Page 250 of 352
TyresDisplay messagesPossible causes/consequences and M SolutionsTyre pressure
Check tyresThe tyre pressure loss warning system has detected a significant
loss in pressure.
A warning tone also sounds.GWARNING
With tyre pressures which are too low, there is a risk of the fol-
lowing hazards:
R the tyres may burst, especially as the load and vehicle speed
increase.
R the tyres may wear excessively and/or unevenly, which may
greatly impair tyre traction.
R the driving characteristics, as well as steering and braking, may
be greatly impaired.
There is a risk of an accident.
XStop the vehicle without making any sudden steering or braking
manoeuvres. Pay attention to the traffic conditions as you do
so.XSecure the vehicle against rolling away ( Y page 162).XCheck the tyres and, if necessary, follow the instructions for a
flat tyre ( Y page 298).XCheck the tyre pressures and, if necessary, correct the tyre
pressure.XRestart the tyre pressure loss warning system when the tyre
pressure is correct ( Y page 321).Check tyre pres‐
sures
then restart Run
Flat IndicatorThe tyre pressure loss warning system generated a display mes-
sage and has not been restarted since.XSet the correct tyre pressure in all four tyres.XRestart the tyre pressure loss warning system ( Y page 321).Run Flat Indicator
inoperativeThe tyre pressure loss warning system is faulty.XVisit a qualified specialist workshop.Please correct the
tyre pressureThe tyre pressure is too low in at least one of the tyres, or the tyre
pressure difference between the wheels is too great.XCheck the tyre pressures at the next opportunity
( Y page 322).XIf necessary, correct the tyre pressure.XRestart the tyre pressure monitor ( Y page 324).248Display messagesOn-board computer and displays