2016 MERCEDES-BENZ CLA COUPE engine

Display messages
Possible causes/consequences and
M
MSolutions ?
Coolant Stop vehi‐ Coolant Stop vehi‐
cle Switch engine cle Switch engine
off off The coolant is too hot.
A warning tone also sounds.
G WARNING
Never drive with an overheated engine. Driving when your engine has
overheated can cause any fluids that may have leaked into the engine compartment to catch fire.
In addition, steam from an overheated engine can cause serious
burns, which can occur just by opening the bonnet.
There is a risk of injury.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 155).
X Wait until the engine has cooled down.
X Make sure that the air supply to the engine radiator is not blocked,
e.g. by frozen slush.
X Do not start the engine again until the display message goes out and
the coolant temperature is below 120 †. The engine may otherwise be damaged.
X Pay attention to the coolant temperature gauge.
If the temperature increases again:
X Consult a qualified specialist workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 120 †. #
See Owner's Manual See Owner's Manual The battery is no longer being charged.
A warning tone also sounds.
Possible causes:
R faulty alternator
R torn poly-V-belt
R a malfunction in the electronics
! Do not continue driving. The engine could otherwise overheat.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 155).
X Consult a qualified specialist workshop. 232
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions #
Stop vehicle See Stop vehicle See
Owner's Manual Owner's Manual The battery is no longer being charged and the battery charge level is
too low.
A warning tone also sounds.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Safeguard the vehicle against rolling away (Y page 155).
X Observe the instructions in the #See SeeOwner's
Owner's Manual
Manualdisplay
message.
X Consult a qualified specialist workshop. 4
Check Check
eng.
eng.oil
oillev.
lev.
when
when next
nextrefuelling
refuelling The engine oil level has dropped to the minimum level.
A warning tone also sounds.
! Avoid long journeys when there is too little coolant in the cooling
system. Otherwise the engine will be damaged.
X Check the oil level when next refuelling, at the latest (Y page 282).
X If necessary, top up the engine oil (Y page 283).
If you have to top up the engine oil frequently:
X Contact a qualified specialist workshop and have the engine
checked.
Information on approved engine oils can be obtained from any quali-
fied specialist workshop or on the Internet at http://bevo.mercedes-
benz.co m. 4
Add 1 litre engine Add 1 litre engine
oil when next refu‐ oil when next refu‐
elling elling The engine oil level has dropped to the minimum level.
! Avoid long journeys when there is too little coolant in the cooling
system. Otherwise the engine will be damaged.
X Check the oil level when next refuelling, at the latest (Y page 282).
X If necessary, top up the engine oil (Y page 283).
If you have to top up the engine oil frequently:
X Contact a qualified specialist workshop and have the engine
checked.
Information on approved engine oils can be obtained from any quali-
fied specialist workshop or on the Internet at http://bevo.mercedes-
benz.com. 4
Engine oil level Engine oil level
Stop Stop
vehicle
vehicle Switch
Switch
engine off
engine off The engine oil level is too low. There is a risk of engine damage.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 155).
X Check the engine oil level (Y page 282).
X If necessary, top up the engine oil (Y page 283). Display messages
233On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions æ
Reserve fuel level Reserve fuel level The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel level drops
into the reserve range.
X Refuel at the nearest filling station. ç There is very little fuel in the fuel tank.
Operation of the auxiliary heating is deactivated.
X You must refuel at the nearest filling station. ¸
Replace air cleaner Replace air cleaner Vehicles with a diesel engine: the engine air filter is dirty and must be
replaced.
X Consult a qualified specialist workshop. !
Clean the fuel fil‐ Clean the fuel fil‐
ter ter Vehicles with a diesel engine: there is water in the fuel filter. The water
must be drained off.
X Consult a qualified specialist workshop. Driving systems
Display messages
Possible causes/consequences and
M
MSolutions À
Attention Assist: Attention Assist:
Take a break! Take a break! Based on certain criteria, ATTENTION ASSIST has detected fatigue or
increasing lapses in concentration on the part of the driver. A warning tone also sounds.
X If necessary, take a break.
During long journeys, take regular breaks in good time so that you get enough rest. À
Attention Assist Attention Assist
inoperative inoperative ATTENTION ASSIST is inoperative.
X Consult a qualified specialist workshop. ë
Off Off The HOLD function is deactivated. The vehicle has started to skid.
A warning tone also sounds.
X Reactivate the HOLD function later (Y page 172). The HOLD function is deactivated. When the brake pedal is firmly
depressed, an activation condition is no longer fulfilled.
A warning tone also sounds.
X Check the activation conditions for the HOLD function
(Y page 172). 234
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Lane
Lane
Keeping
Keeping Assist
Assist
currently unavaila‐
currently unavaila‐
ble ble See
SeeOwner's
Owner's Man‐
Man‐
ual
ual Lane 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 have been no lane markings for an extended 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:
X Stop the vehicle, paying attention to road and traffic conditions.
X Safeguard the vehicle against rolling away (Y page 155).
X Clean the windscreen. Lane Lane
Keeping
Keeping Assist
Assist
inoperative
inoperative Lane Keeping Assist is faulty.
X Consult a qualified specialist workshop. Blind Spot Assist
Blind Spot Assist
currently unavaila‐ currently unavaila‐
ble ble
See
SeeOwner's
Owner's Man‐
Man‐
ual
ual Blind Spot Assist is temporarily inoperative.
Possible causes:
R The radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio stations or other sources of electromagnetic radiation.
R The radar sensor system is outside the operating temperature range
The yellow 9indicator lamps also light up in the exterior mirrors.
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:
X Stop the vehicle, paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 155).
X Restart the engine. Active Blind Spot Active Blind Spot
Assist not availa‐ Assist not availa‐
ble when towing a ble when towing a
trailer trailer
See
SeeOwner's
Owner's
Manual
Manual . 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 message. Blind Spot Assist
Blind Spot Assist
inoperative inoperative Blind Spot Assist is malfunctioning.
The yellow
9indicator lamps also light up in the exterior mirrors.
X Consult a qualified specialist workshop. Parking Pilot can‐ Parking Pilot can‐
celled celled The driver's door is open and the driver's seat belt has not been fas-
tened.
X Repeat the parking process with the seat belt fastened and the
driver's door closed. Display
messages
235On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions You inadvertently touched the multifunction steering wheel while
steering intervention 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 Parking Pilot again later (Y page 180).Parking Pilot inop‐ Parking Pilot inop‐
erative erative You have just carried out a large number of turning or parking manoeu-
vres.
Parking Pilot will become available again after approximately ten
minutes (Y page 180).
X Stop the vehicle, paying attention to road and traffic conditions.
X Switch off and restart the engine.
If the multifunction display still shows the display message:
X Consult a qualified specialist workshop. Parking Assist PARKTRONIC is faulty.
X Consult a qualified specialist workshop. Parking Pilot ended Parking Pilot ended The vehicle is parked. A warning tone also sounds.
The display message disappears automatically. Traffic
Traffic
Sign
Sign Assist
Assist
currently unavaila‐
currently unavaila‐
ble ble See
SeeOwner's
Owner's Man‐
Man‐
ual
ual 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 display message disappears.
Traffic Sign Assist is operational again. Traffic Traffic
Sign
Sign Assist
Assist
inoperative
inoperative Traffic Sign Assist is faulty.
X Consult a qualified specialist workshop. Distance Pilot off
Distance Pilot off Distance Pilot DISTRONIC is deactivated (Y
page 167).
If it was not deactivated by the driver, a warning tone also sounds. Distance Pilot
Distance Pilot
available again available again Distance Pilot DISTRONIC is operational again after having been tem-
porarily unavailable. You can now reactivate Distance Pilot
DISTRONIC (Y page 167).236
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Distance Pilot cur‐
Distance Pilot cur‐
rently unavailable rently unavailable
See Owner's Manual See Owner's Manual Distance Pilot DISTRONIC is temporarily inoperative.
Possible causes:
R The radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio stations 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.
Distance Pilot DISTRONIC is operational again.
If the display message does not disappear:
X Stop the vehicle, paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 155).
X Restart the engine. Distance Distance
Pilot
Pilotinop‐
inop‐
erative
erative Distance Pilot DISTRONIC is faulty. The situation-dependent braking
assistance function may also have failed.
A warning tone also sounds.
X Consult a qualified specialist workshop. Distance Pilot pas‐ Distance Pilot pas‐
sive sive You have depressed the accelerator pedal. Distance Pilot DISTRONIC
is no longer controlling the speed of the vehicle.
X Remove your foot from the accelerator pedal. Distance Pilot
Distance Pilot
- - - km/h - - - km/h A condition for activating Distance Pilot DISTRONIC has not been met.
X Check the activation conditions for Distance Pilot DISTRONIC
(Y page 167). Distance Pilot and Distance Pilot and
Limiter inoperative Limiter inoperative Distance Pilot DISTRONIC and speed limiter are faulty. A warning tone
also sounds.
X Consult a qualified specialist workshop. Cruise control and Cruise control and
Limiter inoperative Limiter inoperative Cruise control and speed limiter are faulty.
A warning tone also sounds.
X Consult a qualified specialist workshop. Limiter passive
Limiter passive If you depress the accelerator pedal beyond the pressure point (kick-
down), the limiter is switched to passive mode.
The speed limitation is not active.
X Drive slower than the stored speed and without kickdown.
X Call up the last speed stored again.
or X Set a new speed.
When the display message disappears, the speed limitation is active. Display
messages
237On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Wheel sensor(s)
Wheel sensor(s)
missing missing There is no signal from the tyre pressure sensor of one or several tyres.
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 Tyre
press.
press. monitor
monitor
inoperative No
inoperative 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 after driving for a few
minutes. Tyre Tyre
press.
press. monitor
monitor
inoperative
inoperative The tyre pressure monitor is faulty.
X Consult a qualified specialist workshop. Vehicle
Display messages
Possible causes/consequences and
M
MSolutions Depress brake to
Depress brake to
start engine start engine You have attempted to start the engine with the transmission in posi-
tion Nwithout depressing the brake pedal.
X Depress the brake pedal. To shift out of P
To shift out of P
or or
N,
N,depress
depress brake
brake
and start engine
and start engine You have attempted to shift the transmission to position
Ror Dwith-
out starting the engine.
X Start the engine.
X Depress the brake pedal.
i It is only possible to shift the transmission from position
Pto the
desired position if you depress the brake pedal. Only then can the
parking lock be deactivated. If you do not depress the brake pedal,
the DIRECT SELECT lever can still be moved but the parking lock
remains engaged.
i At transmission fluid temperatures below
Ò20†you can only shift
out of position Pinto another transmission position when the
engine is running. Apply
Apply
brake
braketo
todese‐
dese‐
lect Park (P) posi‐
lect Park (P) posi‐
tion tion You have attempted to shift the transmission to position
R,Nor D
without depressing the brake pedal.
X Depress the brake pedal. Display messages
241On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Stop vehicle Shift
Stop vehicle Shift
to P Leave engine to P Leave engine
running running The automatic transmission has overheated.
X Drive on carefully.
If the display message disappears, the automatic transmission is
available again.
If the multifunction display still shows the display message:
X Stop the vehicle, paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 155).
X Wait until the automatic transmission has cooled down and the dis-
play message goes out. Auxiliary battery Auxiliary battery
malfunction malfunction The auxiliary battery for the automatic transmission is no longer being
charged.
X Consult a qualified specialist workshop.
X Until then, always shift the transmission to position Pbefore you
switch off the engine.
X Before leaving the vehicle, apply the electric parking brake. Clutch overheated
Clutch overheated
Avoid pulling away Avoid pulling away
If necessary, If necessary,
quickly quickly
release
releaseand
and
engage the clutch
engage the clutch 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 longer
distances.
X Stop the vehicle, paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 155).
X Leave the engine running.
The clutch is cooled more quickly with the engine running.
or X If possible, drive on 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. For engine start For engine start
depress clutch depress clutch You have attempted to start the engine without depressing the clutch
pedal.
X Depress the clutch pedal.
X Restart the engine. The engine has stalled while pulling away, e.g. because the clutch
pedal was released too quickly.
X Depress the clutch pedal again.
The engine starts automatically.
X Slowly release the clutch pedal to pull away. Display
messages
243On-board computer and displays Z