Mercedes-Benz M-Class 2006 Owners Manual - Manual (Page 413)

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Practical hints
What to do if …
Display symbol Display messages Possible cause Possible solution
Ï Coolant
Stop, engine off The poly-V-belt could be broken. ̈ Stop the vehicle and immediately turn off
the engine.
̈ Check the poly-V-belt.
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. Notify an authorized
Mercedes-Benz Light Truck Center.
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 Limit-
ed Warranty.
̈ Drive immediately to the nearest autho-
rized Mercedes-Benz Light Truck Center.
Coolant
Visit workshop The cooling fan for the coolant is
malfunctioning. ̈ Observe the coolant temperature gauge
in the instrument cluster.
̈ Have the fan replaced as soon as possi-
ble.