Mercedes-Benz M-Class Owner's Manual page 270

Display messages
#
4
Check eng. oil
lev. when next
refuelling
8
Reserve fuel level
C
¸
Replace air cleaner
Possible causes/consequences and M Solutions
The battery is not being charged.
A warning tone also sounds.
Possible causes:
faulty alternator
R
torn poly-V-belt
R
a malfunction in the electronics
R
Stop the vehicle immediately, paying attention to road and traf-
X
fic conditions, and switch off the engine.
Open the bonnet.
X
Check whether the poly-V-belt is torn.
X
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
Consult a qualified specialist workshop.
X
If the poly-V-belt is OK:
Visit a qualified specialist workshop.
X
The oil level has dropped to the minimum level.
A warning tone also sounds.
Check the oil level, at the latest when next refuelling
X
( page 320).
Y
If necessary, top up the engine oil (
X
Have the engine checked at a qualified specialist workshop if
X
the engine oil needs topping up more often than usual.
The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated when the fuel level
drops into the reserve range.
Refuel at the nearest filling station.
X
There is only a very small amount of fuel in the fuel tank.
The auxiliary heating cannot be operated.
Refuel at the nearest filling station without fail.
X
Vehicles with a diesel engine: the engine air filter is dirty and must
be replaced.
Visit a qualified specialist workshop.
X
Display messages
page 320).
Y
267
Z