Mercedes-Benz M-Class 2012 Owners Manual - Manual (Page 260)

Driving systems
Display messages Possible causes/consequences and M Solutions
À
Attention Assist:
Drowsiness
Detected
Based on specific criteria, ATTENTION ASSIST has determined that
the driver is tired or paying less attention. 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 has failed.
X Visit a qualified specialist workshop.
Á
Drive More Slowly
You cannot change the vehicle level. Possible causes are:
R you are driving too fast for the selected vehicle level.
R you are towing a trailer.
R the trailer-coupling socket is being used, e.g. for a bicycle rack.
X Drive more slowly and then select the desired vehicle level again
(
Y
page 181).
X
Observe the notes on towing a trailer (
Y
page 210).
Á
Compressor Is
Cooling
You have selected a higher vehicle level. The compressor first
needs to cool down because of frequent level changes.
X
Drive in a manner appropriate for the current vehicle level.
X Make sure that there is sufficient ground clearance.
X Allow the compressor to cool down.
When the compressor has cooled down, the display message
disappears. The vehicle then continues rising to the selected
level.
Á
Malfunction
AIRMATIC is malfunctioning.
X
Drive in a manner appropriate for the current vehicle level, but
no faster than 50 mph (80 km/h).
X Make sure that there is sufficient ground clearance.
X Have the vehicle checked at a qualified specialist workshop.
The Active Curve System is faulty. The vehicle's handling
characteristics may be affected.
X Do not drive faster than 50 mph (80 km/h).
X Have the vehicle checked at a qualified specialist workshop.
258
Display messages
On-board
computer
and
displays