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Practical hints
What to do if …
During severe operation conditions and
stop-and-go city traffic, the coolant tem-
perature may rise close to 248°F (120°C).
Display symbol Display messages Possible cause/consequence Possible solution
Z
Coolant
Stop, turn engine off
The coolant is too hot. ̈ Stop the vehicle in a safe location or as soon
as it is safe to do so and immediately turn
off the engine.
̈ Only start the engine again after the mes-
sage disappears. You could otherwise dam-
age the engine.
̈ Apply the parking brake (୴ page 53).
̈ Observe the coolant temperature indicator
in the instrument cluster (
୴ page 26).
If the temperature rises again:
̈ Contact an authorized Mercedes-Benz
Center immediately.
Warning! G
Driving when your engine is badly overheat-
ed 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 engine hood. Stay away from the engine
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.
!
The engine should not be operated with the
coolant temperature above 248°F (120°C).
Doing so may cause serious damage which is not
covered by the Mercedes-Benz Limited
Warranty.