Display messages Possible causes/consequences and
M Solutions
# The battery is no
tbeing charged.
Aw arning tone also sounds.
Possible causes:
R faulty alternator
R torn poly-V-belt
R a malfunction in the electronics
X Stop the vehicle immediately, paying attentio ntoroad and traf-
fic conditions, and switch off the engine.
X Open the bonnet.
X Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
X Consult a qualified specialist workshop.
If the poly-V-belt is OK:
X Visit a qualified specialist workshop. 4
Check eng. oil
lev. when next
refuelling The engine oil level has dropped to the minimum level.
Aw
arning tone also sounds.
X Chec kthe oil level when next refuelling, at the latest
(Y page 291).
X If necessary, top up the engine oil (Y page 293).
X Have the engine checked at a qualified specialist workshop if
the engine oil needs topping up more often than usual. 4
Engine oil level
Stop vehicle Turn
engine off The engine oil level is too low. There is a risk of engine damage.
X
Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Top up the engine oil (Y page 293) and check the oil level
(Y page 291). 4
Add
1 litre engine
oil when next refu‐
elling AMG vehicles: the engine oil level is too low.
X
Check the oil level when next refuelling, at the latest
(Y page 291).
X If necessary, top up the engine oil (Y page 293).
X Have the engine checked at a qualified specialist workshop if
the engine oil needs topping up more often than usual. 4
Cannot measure
engine oil level The measuring system is malfunctioning.
X Visit a qualified specialist workshop. Display messages
239On-board computer and displays Z
