Mercedes-Benz 2004 CLK 55 AMG User Manual
Page 309
309
Practical hints
What to do if …?
Problem
Possible cause
Suggested solution
•
The red coolant warning lamp 
comes on when the engine is 
running.
There is insufficient coolant in the reservoir.
̈
Add coolant to prevent engine from 
overheating (
୴
page 286).
If this warning lamp comes on frequently, 
there is a leak in the cooling system.
̈
Have the cooling system checked.
If the coolant level is correct, the electric ra-
diator fan may be broken.
̈
If the coolant temperature is below 
257°F (125°C), you can continue 
driving to the nearest authorized 
Mercedes-Benz Center.
̈
Avoid high engine loads (e.g. driving 
uphill) and stop-and-go driving.
•
The red coolant warning lamp 
comes on while driving and you 
hear a warning sound.
The coolant temperature has exceeded 
257°F (125 °C).
̈
Stop as soon as possible and allow 
the engine and coolant to cool down.
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 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.