Mercedes-Benz SLR McLaren. Operator's Manual.

Practical hints
What to do if ...
Left display Right display Possible cause/
consequence
Ï Coolant
Stop, put engine
off
Warning! G
Driving when your engine is badly 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
serious burns and can occur just by opening
the hood. Stay away from the engine if you
see or hear steam coming from it.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until the
engine has cooled down.
324
Possible solution
The coolant is too hot. Stop the vehicle in a safe location and turn off the engine.
During severe operating conditions and
stop-and-go city traffic, the coolant temperature
may rise close to 248°F (120°C).
!
The engine should not be operated with
the coolant temperature above 248°F
(120°C). Doing so may cause serious
engine damage which is not covered by
the Mercedes-Benz Limited Warranty.
Only start the engine again after the message disappears.
You could otherwise damage the engine.