Engine, exhaust system and fuel › Engine electronics 199
It is not possible to top up with a sufficient amount
NOTICE
of coolant
Risk of damage to the cooling system and the en-
gine!
Adding coolant that does not conform to the correct
specification can reduce the corrosion protection of
the cooling system.
Stop driving.
Stop the engine and seek the help of a specialist
garage.
›
›
There is a loss of coolant
Top up the coolant and seek the help of a specialist
garage.
›
Troubleshooting
Coolant level is too low
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Engine electronics
Troubleshooting
or
Petrol engine control faulty
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Message concerning the required coolant
check
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Driving in emergency mode is possible - a
noticeable reduction in engine performance may oc-
cur.
Check the coolant level.
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If the coolant level is OK:
Continue driving, exercising appropriate caution,
and seek the help of a specialist garage.
›
Check the fuse for radiator fan, replace if re-
quired » page 207, Replacing a fuse.
›
Diesel engine control faulty
If the fuse is OK but the indicator light lights up
again:
flashes
Stop driving! Seek the help of a specialist garage.
›
Driving in emergency mode is possible - a noticeable
reduction in engine performance may occur.
Coolant temperature too high
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Continue driving, exercising appropriate caution,
and seek the help of a specialist garage.
›
or
Diesel preheating system faulty
illuminates, or does not illuminate after the
ignition is switched on
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Report regarding the engine overheating
Driving in emergency mode is possible - a noticeable
reduction in engine performance may occur.
Stop driving.
Stop the engine and allow it to cool.
Drive on after the indicator light goes out.
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›
Continue driving, exercising appropriate caution,
›
›
and seek the help of a specialist garage.
Engine fault
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Particle filter
or
Troubleshooting
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Clogged particle filter
Stop driving!
›
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Stop the engine and seek the help of a specialist
›
garage.
or
There is no coolant of the correct specification
available
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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.
›
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
power will be reduced, and the START-STOPP func-
tion will not be available.
Another substance was used for topping up, other
than distilled or demineralised water:
Have the coolant changed by a specialist garage.
›
English 
