Mercedes-Benz M-Class 2006 Owners Manual - Manual (Page 399)

398
Practical hints
What to do if …
Display message Possible cause Possible solution
ABS unavailable
See Operator’s Manual The ABS was deactivated because of
insufficient power supply. The charg-
ing voltage has fallen below ten
volts.
The brake system is still functioning
normally but without the ABS
available.
̈ Switch off electrical consumers that are
currently not needed, e.g. seat heating*.
̈ If necessary, have the generator
(alternator) and the battery checked.
When the voltage is above this value again, the
ABS is operational again and the message in
the multifunction display should disappear.
Battery
protection Convenience functs.
Temporarily
Unavailable The battery has insufficient voltage
and can no longer supply conve-
nience functions such as the rear
window defroster. As soon as the on-board voltage is sufficient,
the consumers will switch on again.
Please note: Convenience Functions
Available again On-board voltage is sufficient; the
consumers will switch on again.
Cruise
control Drive to workshop Cruise control is malfunctioning. ̈ Have cruise control checked by an
authorized Mercedes-Benz Light Truck
Center.
DSR Malfunction Downhill Speed Regulation is
malfunctioning. ̈ Have the Downhill Speed Regulation
checked by an authorized Mercedes-Benz
Light Truck Center.