Mercedes-Benz GL-Class 2009 Owners Manual - Manual (Page 351)

Vehicle status messages in the multifunction display
349
Driving systems
Display messages Possible cause/consequence Possible solution
n Level Selection
Not Permitted
The selected vehicle level cannot
adjusted, because
R you are driving too fast for the desired
vehicle level
R you are towing a trailer
R you are using accessories that are
connected to the trailer power socket,
e.g. a bicycle rack
X Reduce vehicle speed and set the desired
vehicle level again (
Y page 186).
X Observe the notes on trailer towing
(
Y page 310).
n Malfunction The air suspension is malfunctioning. X Do not drive faster than 50 mph (80 km/h).
X Have the system checked at an authorized
Mercedes-Benz Center.
Practical hints
Z