Mercedes-Benz GL-Class: Notes on towing a trailer
Important safety notes
WARNING 
When towing a trailer, incorrect equipment
and driving style could cause you to lose
control of the vehicle.
Towing incorrectly or not observing this
Operator's Manual could lead to damage to
the vehicle and/or serious injuries. Observe
the following guidelines to ensure safe trailer
towing.
Contact a Mercedes-Benz Center if you need
further explanation of the information
contained in this Operator's Manual.
General information
• Only install an approved trailer
coupling on
your vehicle.
Further information on availability and on
installation is available from any authorized
Mercedes-Benz Center.
• The bumpers of your vehicle are not
suitable for installing detachable trailer
couplings.
• Do not install hired trailer couplings or
other detachable trailer couplings on the
bumpers of your vehicle.
• To reduce the risk of damage to the ball
coupling, remove it from the ball coupling
recess when not in use.
Trailer towing
...
Coupling up a trailer
WARNING
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 an ...
See also:
Precautions when starting and driving
WARNING
► Do not leave children or adults who
would normally require the support of
others alone in your vehicle. Pets should
not be left alone either. They could
accidentally injure ...
Navigation
OnStar navigation requires the Directions and Connections service plan.
Push to receive directions or have
them sent to the vehicle navigation screen. Destinations can also be forwarded to
the veh ...
Airbag System
The vehicle has the following airbags:
► A frontal airbag for the driver.
► A frontal airbag for the front outboard passenger.
► A seat-mounted side impact airbag for the driver.
...
