Mercedes-Benz SLR McLaren. Operator's Manual.

Practical hints
What to do if ...
Problem Possible cause/consequence Suggested solution
D The red coolant warning lamp
comes on when the engine is
running.
D The red coolant warning lamp
comes on while driving and you
hear a warning sound.
Warning! G
Driving when your engine is badly overheated
can cause some fluids which may have
leaked into the engine compartment to
302
There is insufficient coolant in the reservoir. Immediately add coolant to prevent
engine from overheating
( page 250).
If this warning lamp comes on frequently, Have the cooling system checked by
there is a leak in the cooling system.
an authorized Mercedes-Benz Center.
If the coolant level is correct, the electric If the coolant temperature is below
radiator fan may be broken.
248°F (120°C), you can continue
driving to the nearest authorized
Mercedes-Benz Center.
The coolant temperature has exceeded
248°F (120°C).
catch fire. You could be seriously burned.
Steam from an overheated engine can cause
serious burns and can occur just by opening
the engine hood. Stay away from the engine
if you see or hear steam coming from it.
Avoid high engine loads (e.g. driving
uphill) and stop-and-go driving.
Stop as soon as possible in a safe location
and allow the engine and coolant
to cool down.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until the
engine has cooled down.