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:
High Intensity Discharge (HID) Lighting
WARNING
The low beam high intensity discharge lighting system operates at a very high
voltage. If you try to service any of the system components, you could be seriously
injured. Have your deal ...
Checking engine coolant level
Check the coolant level in the reservoir
when the engine is cold. If the coolant
level is below MIN 2 , open the reservoir
tank cap and add coolant up to the MAX1
level. If the reservoir tan ...
Window reset
The windows will need to be reset if the battery is disconnected, becomes discharged
or power supply is interrupted.
Reset as follows:
1. Close the window fully.
2. Release the switch, then lift ...
