360 Practical hintsWhat to do if …?Display 
Possible cause
Possible solution
#
BATTERY CHARGE
VISIT WORKSHOP
The battery is no longer charging.
Possible causes:
alternator malfunctioning
broken poly-V-belt
Do not forget that the brake system re-
quires electrical energy and may be oper-
ating with restricted capability. 
Considerably greater brake pedal force is 
required and the stopping distance is 
longer.
Stop immediately and 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 Center.
If it is intact:
Drive immediately to the nearest autho-
rized Mercedes-Benz Center. Adjust driv-
ing to be consistent with reduced braking 
responsiveness.
;(USA only)!(Canada only)
 RELEASE
 PARKING BRAKE
You are driving with the parking brake en-
gaged.
Release the parking brake (
page 48).  
364 Practical hintsWhat to do if …?Display 
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 Center.
If it is intact:
Restart the engine only after the message 
disappears from the multifunction dis-
play. Doing so could result in serious en-
gine damage that is not covered by the 
Mercedes-Benz Limited Warranty.
Observe the coolant temperature gauge 
in the instrument cluster (
page 24).
Drive immediately to the nearest autho-
rized Mercedes-Benz Center. Adjust driv-
ing to be consistent with reduced braking 
responsiveness.