Mercedes-Benz GLK-Class 2012 Owners Manual - Manual (Page 166)

weight. The permissible gross vehicle
weight is indicated on the identification
plate on the B-pillar on the driver's side of
the vehicle.
i Mercedes-Benz recommends loading the
trailer so that the drawbar noseweight
remains between 8% and 15% of the
permissible gross trailer weight.
i The weight of additional accessories,
passengers, and cargo reduces the
permissible trailer load and drawbar
noseweight for your vehicle.
Checking the vehicle and trailer weight
R
To check that the weights of the towing
vehicle and the trailer comply with the
maximum permissible values, have the
vehicle/trailer combination (including the
driver, passengers, and cargo with a fully
laden trailer) weighed on a calibrated
weighbridge.
R
Check the gross axle weight rating of the
front and rear axles, the gross weight of the
trailer and trailer drawbar noseweight.
Removing the ball coupling
X Observe the manufacturer's installation
instructions.
X Press the protective cap into the ball
coupling recess.
X Make sure that the protective cap is firmly
in place.
Storing the ball coupling
G WARNING
Do not carry the ball coupling in the vehicle
interior if it is not secured.
Otherwise, you and others could be injured by
the ball coupling being thrown around if you:
R brake sharply
R change direction suddenly
R
are involved in an accident
X Observe the manufacturer's installation
instructions.
Trailer power supply
The trailer socket of your vehicle is equipped
at the factory with a permanent power supply.
The permanent power supply is supplied via
trailer socket pin 4.
! You can connect accessories with a
maximum power consumption of 240 W to
the permanent power supply.
You must not charge a trailer battery using
the power supply.
The trailer's permanent power supply is
switched off in the event of low vehicle supply
voltage and after six hours at the latest.
You can obtain further information about
installing the trailer's electrical equipment
from a qualified specialist workshop, e.g. an
authorized Mercedes-Benz Center.
164
Trailer towing
Driving and parking