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Practical hints
What to do if …?
During severe operating conditions, e.g.
stop-and-go traffic, the coolant tempera-
ture may rise close to 248°F (120°C).
Problem Possible cause/consequence Suggested solution
• The red coolant warning lamp
comes on while driving and you
hear a warning sound.
The coolant temperature has exceeded
248°F (120°C).
̈ Stop in a safe location as soon as pos-
sible and allow the engine and coolant
to cool down.
Warning! G
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
serious burns which can occur just by open-
ing 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.
!
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.