Mercedes-Benz CL Operator's Manual page 445

Vehicle status messages in the multifunction display
! The engine should not be operated with the coolant temperature above 248‡ (120†).
Doing so may cause serious damage which is not covered by the Mercedes-Benz Limited
Warranty.
Display messages
Coolant
?
Low Stop
Vehicle
Turn
Engine Off
?
Possible causes/consequences and X Solutions
The poly-V-belt could be broken.
X
Stop the vehicle immediately as soon as it is safe to do so.
X
Turn off the engine immediately.
X
Check the poly-V-belt.
X
If it is broken: Do not continue to drive. Otherwise the
engine will overheat due to an inoperative water pump
which may result in damage to the engine. Contact an
authorized Mercedes-Benz Center.
X
If it is intact: Do not continue to drive the vehicle with this
message displayed. Doing so could result in serious engine
damage that is not covered by the Mercedes-Benz Limited
Warranty.
X
Observe the coolant temperature gauge in the instrument
cluster.
X
Drive to the nearest authorized Mercedes-Benz Center
immediately.
The radiator cooling fan is malfunctioning.
X
Observe the coolant temperature gauge in the instrument
cluster.
If the coolant temperature is below 248‡ (120†), you may
continue driving to an authorized Mercedes-Benz Center.
X
Avoid placing heavy loads on the engine (e.g. by driving
uphill) as well as stop-and-go traffic.
X
Have the fan replaced as soon as possible.
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