Mercedes-Benz E 2008 Series Owner's Manual page 291

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Practical advice
Troubleshooting
Problem
D The red coolant warning
lamp comes on while the
engine is running. You will
also hear a warning tone.
D The red coolant warning
lamp comes on while the
engine is running. You will
also hear a warning tone.
± The yellow engine diagnos-
tics warning lamp comes
on while the engine is run-
ning.
288
Version: 2.9.4
Possible cause/consequence
The coolant level is too low.
The coolant temperature has
exceeded 120 †. The engine is
not being cooled sufficiently and
may be damaged.
If the coolant level is correct, the
radiator fan may be faulty.
The coolant temperature has
exceeded 120 †. The engine is
not being cooled sufficiently and
may be damaged.
Vehicles with a diesel engine: the
fuel tank has run dry.
Suggested solutions
Stop the vehicle as soon as possible. Pay attention to the traffic
X
conditions as you do so.
Allow the engine and coolant to cool.
X
Check the coolant level. Observe the warning notes
X
( page 225). Top up the coolant if necessary.
Y
Have the coolant system checked at a qualified specialist work-
X
shop if the coolant needs topping up more often than usual.
Do not continue driving under any circumstances.
X
Consult a qualified specialist workshop.
X
Start the engine three to four times after refuelling.
X
Emergency running mode is cancelled. The vehicle need not be
checked.