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.
See also:
Recovering a vehicle that has becomestuck
Pull away smoothly, slowly, and in a
straight line when pulling out a vehicle that
has become stuck. Excessive tractive
power could damage the vehicles.
If the drive wheels have become stuck i ...
Deleting contacts
To delete a group of contacts: select
Data/Connections in the telephone basic
menu by sliding and turning
the
COMAND controller and press to
confirm.
Select Delete Contacts and press ...
SmartKey
Display messages
Possible causes/consequences and Solutions
Key Does
Not Belong to Vehicle
You have put the wrong SmartKey in the ignition lock.
Use the correct Smart ...