Engine, exhaust system and fuel › Engine electronics 121
Coolant temperature too high
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power will be reduced, and the START-STOPP func-
tion will not be available.
Report regarding the engine overheating
Stop driving.
Stop the engine and allow it to cool.
Drive on after the indicator light goes out.
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Filter cleaning
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Conditions for cleaning
✓ The engine is warm.
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Engine fault
✓ For vehicles with manual transmission, observe
the gear recommendation shown in the display of
the instrument cluster.
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Stop driving!
Stop the engine and seek the help of a specialist
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Cleaning procedure
garage.
Drive at a speed of at least 80 km/h at engine
speeds between 3000-5000 rpm.
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There is no coolant of the correct specification
available
Release the accelerator pedal and let the vehicle
roll with the gear engaged for a few seconds.
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Top up with distilled or demineralised water.
Have the correct coolant mixing ratio corrected by
a specialist garage as soon as possible.
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Repeat this procedure several times.
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If the filter is cleaned successfully, the indicator light
goes out
.
Another substance was used for topping up, other
than distilled or demineralised water:
If the indicator light
does not go off within
30 minutes, the filter was not cleaned.
Have the coolant changed by a specialist garage.
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Continue driving, exercising appropriate caution,
and seek the help of a specialist garage.
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It is not possible to top up with a sufficient amount
of coolant
Stop driving.
Stop the engine and seek the help of a specialist
garage.
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Exhaust control system
Troubleshooting
There is a loss of coolant
Emission control system faulty
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Top up the coolant and seek the help of a specialist
garage.
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Driving in emergency mode is possible - a no-
ticeable reduction in engine performance may occur.
Engine electronics
Troubleshooting
Continue driving, exercising appropriate caution,
and seek the help of a specialist garage.
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Petrol engine control faulty
Fuel filler flap
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Driving in emergency mode is possible - a
noticeable reduction in engine performance may oc-
cur.
Opening the fuel filler flap
Press the flap and open
it.
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Drive on carefully, get the help of a specialist com-
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pany.
Particle filter
Troubleshooting
Clogged particle filter
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Clean the filter.
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When the indicator light is on, it must be as-
sumed that fuel consumption will be higher, engine
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