Mercedes-Benz 2013 GL Class - Manual (Page 303)

Driving systems
Display messages Possible causes/consequences and M Solutions
À
Attention Assist:
Take a Break!
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.
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.
R
Vehicles with the ON&OFFROAD package ( Y page 204)
R
Vehicles with the AIRMATIC package ( Y page 209)
X Observe the notes on towing a trailer ( Y page 255).
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.
Display messages
301
On-board computer and displays
Z