292 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
BATTERY / ALTERNATOR
* C = Category, see page 290
This message indicates a malfunction which must be 
repaired immediately.
It may indicate that the poly-V-belt has broken. Should 
this condition occur, the poly-V-belt must be replaced 
before continuing to operate the vehicle. Otherwise, the 
engine will overheat due to an inoperative water pump 
which may result in damage to the engine.
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.
Line 1 Line 2 C*
BATTERY/ALTERNATOR VISIT WORKSHOP! 2 
298 Malfunction and warning messages
Te ch n i c a l
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hints Car care Index
COOLANT (coolant temperature)
* C = Category, see page 290
1 This may indicate that the poly-V-belt has broken. Should this 
condition occur, the poly-V-belt must be replaced before continuing 
to operate the vehicle. Otherwise, the engine will overheat due to 
an inoperative water pump which may result in damage to the 
engine. 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.
2 The cooling fan for the coolant is faulty. Observe the coolant 
temperature gauge. See page 137
During severe operating conditions and stop-and-go city 
traffic, the coolant temperature may rise close to 120
°C.
The engine should not be operated with the coolant 
temperature above 120
°C. Doing so may cause serious 
engine damage which is not covered by the 
Mercedes-Benz Limited Warranty.
Line 1 Line 2 C*
COOLANT STOP, ENGINE OFF!
1
1
COOLANT VISIT WORKSHOP!
2
2
Wa r n i n g !
Driving when your engine is badly 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 and can occur just by opening the engine 
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 it cools down.