369 Practical hints
What to do if …
Symbol messagesDisplay symbol
Display message
Possible cause/consequence
Possible solution
#
Battery Alternator
Visit workshop
The battery is no longer charging.
Possible causes:
broken poly-V-belt
alternator malfunctioning
Stop immediately and check the 
poly-V-belt in a safe location or as 
soon as it is safe to do so.
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 Center.
If it is intact:
Drive immediately to the nearest 
authorized Mercedes-Benz Center.
Low voltage
Charge battery
The battery has insufficient voltage.
Start the engine (
page 48).
Low voltage
Consumers off
 
The battery has insufficient voltage.
Turn off unnecessary electrical 
consumers. 
373 Practical hints
What to do if …
Display symbol
Display message
Possible cause/consequence
Possible solution
•
Coolant
Stop, engine off!
The poly-V-belt could be broken.
Stop the vehicle in a safe location 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 au-
thorized Mercedes-Benz Center.
If it is intact:
Do not continue to drive the vehicle with this mes-
sage displayed. Doing so could result in serious 
engine damage that is not covered by the 
Mercedes-Benz Limited Warranty.
Observe the coolant temperature gauge in the in-
strument cluster (
page 24).
Drive immediately to the nearest authorized 
Mercedes-Benz Center.
Coolant
Visit workshop.
The cooling fan for the coolant is 
malfunctioning.
Observe the coolant temperature gauge in the in-
strument cluster (
page 24).
Have the fan replaced as soon as possible.