Mercedes-Benz B-Class 2011 Owner's Manual page 224

Display messages
4
Check eng. oil
lev. when next
refuelling
æ
Reserve fuel level
ç
¸
Replace air cleaner
!
Clean the fuel fil‐
ter
Driving systems
Display messages
À
Attention Assist:
Drowsiness detec‐
ted
À
Attention Assist
inoperative
Possible causes/consequences and M Solutions
The engine oil level has dropped to the minimum level.
A warning tone also sounds.
Check the oil level when next refuelling, at the latest
X
( page 263).
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.
Refuel at the nearest filling station.
X
There is only a very small amount of fuel in the fuel tank.
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
Vehicles with a diesel engine: there is water in the fuel filter. The
water must be drained off.
Visit a qualified specialist workshop.
X
Possible causes/consequences and M Solutions
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.
If necessary, take a break.
X
During long journeys, take regular breaks in good time so you get
enough rest.
ATTENTION ASSIST is inoperative.
Visit a qualified specialist workshop.
X
Display messages
page 264).
Y
221
Z