Mercedes-Benz 2003 C 240 4MATIC Operator's Manual page 278

Practical hints
What to do if ...
Display
#
UNDERVOLTAGE
ENGINE ON!
UNDERVOLTAGE
SWITCH CONSUMERS OFF!
G
VISIT WORKSHOP!
DISPLAY DEFECTIVE
±
VISIT WORKSHOP!
DISPLAY DEFECTIVE
W
WASHER FLUID
CHECK LEVEL!
278
Possible cause
The battery has insufficient voltage and
can no longer supply the convenience
functions such as seat heater*.
The battery is malfunctioning.
The instrument cluster display is
malfunctioning.
Certain electronic systems are unable to
relay information to the control system.
The following systems may have failed:
Coolant temperature display
Tachometer
Cruise control display
The fluid level has dropped to about
of total reservoir capacity.
Suggested solution
Start the engine ( page 44).
Have the battery checked at a service
station.
Continue driving with added caution.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Have the electronic systems checked
by an authorized Mercedes-Benz
Center ( page 259).
1
/ Add washer fluid ( page 241).
3