Mercedes-Benz 2009 C-Class Operator's Manual page 310

Practical hints
Vehicle status messages in the multifunction display
Display messages
ESP Currently
Unavailable
See Operator's
Manual
ESP Currently
Unavailable
See Operator's
Manual
308
Possible cause/consequence
®
In addition, the yellow ESP warning lamp
v comes on.
The brake system still functions normally
but due to insufficient power supply the
®
BAS, the ESP and the hill start assist
system are not available.
®
If the yellow ESP warning lamp v
flashes while driving and this message
appears, the Electronic Traction System
has switched off to prevent overheating of
the drive wheel brakes.
Possible solution
X
Continue driving with added caution.
When the voltage is above the required value
®
again, the ESP is operational again and the
message in the multifunction display should
disappear.
If the message in the multifunction display does
not disappear:
X
Have the alternator and the battery checked.
X
Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.
As soon as the brakes have cooled off, the
Electronic Traction System switches on again.
The message in the multifunction display
®
disappears and the ESP warning lamp v
goes out.