Mercedes-Benz 2007 SLR Mclaren Operator's Manual page 307

Practical hints
What to do if ...
Problem
D
The red coolant temperature
warning lamp comes on while
the engine is running.
D
The red coolant temperature
warning lamp comes on while
the engine is running and you
hear a warning sound.
Warning!
Driving when your engine is overheated can
cause some fluids which may have leaked
into the engine compartment to catch fire.
You could be seriously burned.
Steam from an overheated engine can cause
306
Possible cause/consequence
There is insufficient coolant in the reservoir.
If this warning lamp comes on frequently,
there is a leak in the cooling system.
If the coolant level is correct, the electric
radiator fan may be broken.
The coolant temperature has exceeded
248°F (120°C).
G
serious burns which can occur just by open-
ing the engine hood. Stay away from the en-
gine if you see or hear steam coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of
the vehicle and do not stand near the vehicle
until the engine has cooled down.
Suggested solution
Immediately add coolant to prevent en-
gine from overheating ( page 255).
Have the cooling system checked by
an authorized Mercedes-Benz Center.
If the coolant temperature is below
248°F (120°C), you can continue driv-
ing to the nearest authorized
Mercedes-Benz Center.
Avoid high engine loads (e.g. driving
uphill) and stop-and-go driving.
Stop as soon as possible in a safe loca-
tion and allow the engine and coolant
to cool down.
During severe operating conditions, e.g.
stop-and-go traffic, the coolant tempera-
ture may rise close to 248°F (120°C).
!
The engine should not be operated with the
coolant temperature above 248°F (120°C). Do-
ing so may cause serious engine damage which
is not covered by the Mercedes-Benz Limited
Warranty.