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74 Controls and displays
Bulb fault
The control lamp lights up when there is a fault in a bulb:
● For several seconds after switching on the ignition
● When connecting a faulty bulb
This is indicated on the informative display, e.g.:
Check the front right dipped beam headlight!
Note
The rear side lights and number plate light contain several bulbs. The con-
trol lamp lights up only when there is a fault in all the number plate
bulbs or side light bulbs (of a combined tail light). Therefore it is advisable
to regularly check the bulb operation.
Emission control system
If the warning lamp is lit up, there is a fault in the emission system. The
engine control unit allows driving to continue in an emergency program.
Seek professional help.
Preheating (diesel engines)
When you switch on the ignition, the warning lamp lights up. The engine
can be started straight away when the lamp switches off.
If the warning lamp does not light up or if it does not switch off, there is
a fault in the glow plug system.
If the warning lamp starts to flash while driving, there is a fault in the
engine power control electronic system. The engine control unit allows driv-
ing to continue in an emergency program.
Seek professional help.
Engine management system (petrol engines)
If the warning lamp is lit up, there is a fault in the engine management
system. The engine control unit allows driving to continue in an emergency
program.
Seek professional help.
Particulate filter (diesel engines)
The particulate filter eliminates soot from emissions. The particles accumu-
late in the filter where they are normally burned off.
If the warning lamp is lit up, the filter is obstructed by soot.
In order for the filter to clean itself (if the traffic conditions ⇒
so permit) it
is essential to drive for at least 15 minutes (or until the warning lamp
switches off) with 4th or 5th gear engaged (automatic gearbox: position S)
at a minimum speed of 60 km/h (37 mph) with the engine speed between
1800-2500 rpm.
The warning lamp switches off once the filter has been successfully
cleaned.
If the cleaning process is not successful, the warning lamp does not
switch off and the warning lamp starts to flash.
The informative display indicates:
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