Mercedes-Benz B-Class 2011, Owner'S Manual

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Display messages Possible causes/consequences and M Solutions
4
Check eng. oil
lev. when next
refuelling
The engine oil level has dropped to the minimum level.
A warning tone also sounds.
X
Check the oil level when next refuelling, at the latest
(
Y
page 263).
X
If necessary, top up the engine oil (
Y
page 264).
X
Have the engine checked at a qualified specialist workshop if
the engine oil needs topping up more often than usual.
æ
Reserve fuel level
The fuel level has dropped into the reserve range.
X
Refuel at the nearest filling station.
ç
There is only a very small amount of fuel in the fuel tank.
X
Refuel at the nearest filling station without fail.
¸
Replace air cleaner
Vehicles with a diesel engine: the engine air filter is dirty and must
be replaced.
X
Visit a qualified specialist workshop.
!
Clean the fuel fil‐
ter
Vehicles with a diesel engine: there is water in the fuel filter. The
water must be drained off.
X
Visit a qualified specialist workshop.
Driving systems
Display messages Possible causes/consequences and M Solutions
À
Attention Assist:
Drowsiness detec‐
ted
Based on certain criteria, ATTENTION ASSIST has detected fatigue
or a lack of concentration on the part of the driver. A warning tone
also sounds.
X
If necessary, take a break.
During long journeys, take regular breaks in good time so you get
enough rest.
À
Attention Assist
inoperative
ATTENTION ASSIST is inoperative.
X
Visit a qualified specialist workshop.
Display messages
221
On-boar
d
compu
ter
and
disp
lays
Z