Mercedes-Benz M-Class 2009 Owners Manual - Manual (Page 288)

Driving instructions
286
Decoupling the trailer
G Warning!
Vehicles with air suspension program:
While you are coupling or decoupling a
trailer, make sure nobody locks or unlocks
the vehicle and/or opens or closes doors
or the tailgate.
The vehicle’s level could change and you
could endanger yourself and/or others as
a result.
Make sure that you do not operate the ADS
switch or the vehicle level control system
when coupling/decoupling the trailer.
X Make sure the automatic transmission is in
park position
P ( Y page 130).
X Engage the parking brake for the vehicle
(
Y page 127).
X Start the engine ( Y page 122).
X Close all doors and the tailgate.
X Engage the parking brake for the trailer.
G Warning!
Vehicles with air suspension program: As
soon as you disconnect the electrical
connection between the trailer and the
vehicle, the vehicle will lower. To help avoid
personal injury, make sure no one is near
the wheel housing or underneath the
vehicle before the electrical connection is
disconnected.
When you decouple the trailer, the vehicle
is temporarily raised because the springs
are relieved of load. Be especially careful
during this process, as you could otherwise
injure yourself and/or others. Make sure
that any persons remaining in the vehicle
do not press the switches for vehicle level
control or the ADS.
X Disconnect all electrical plug connectors.
X Decouple the trailer.
X Make sure that the trailer coupling is free
of load.
X Turn off the engine ( Y page 127).
Driving abroad
If you plan to drive the vehicle outside the U.S.
or Canada, you should request dealer
network information for your destination from
any authorized Mercedes-Benz Center.
Control and operation of radio
transmitter
Safety notes
G Warning!
Please do not forget that your primary
responsibility is to drive the vehicle safely.
Only operate the COMAND (Cockpit
Management and Data system), radio or
telephone
18 if road, weather and traffic
conditions permit. Otherwise, you may not
be able to observe traffic conditions and
could endanger yourself and others.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet
(approximately 14 m) every second.
18 Observe all legal requirements.
Operation