Mercedes-Benz B-Class 2011 Owner's Manual page 188

Secure the trailer against rolling away.
X
Remove the trailer cable and decouple the
X
trailer.
Folding in the ball coupling
G
WARNING
Make sure that no persons or animals are in
the pivoting range of the ball coupling. Other-
wise, they could be injured.
Fold the ball coupling back in if you are not
X
using the trailer tow hitch.
Place the protective covering on the ball
X
coupling.
The release wheel is located behind the left-
hand side trim panel in the boot.
To open the cover: turn handle : anti-
X
clockwise and fold down cover ; and
remove it.
Pull out release wheel =.
X
Turn release wheel = anti-clockwise as far
X
as it will go.
The ball coupling disengages and folds out
behind the rear bumper. Indicator
lamp ? flashes.
Press the ball coupling in the direction of
X
the arrow until it engages behind the
bumper.
Indicator lamp ? goes out and the mes-
sage in the multifunction display disap-
pears.
Trailer power supply
! You can connect accessories with a
power rating of up to 240 W to the perma-
nent power supply and with a power rating
of up to 180 W to the power supply that is
switched on via the ignition lock.
The trailer battery may not be charged from
the power supply.
To switch the connected power supply
X
on or off: turn the key in the ignition lock
to position 2 or 0 respectively.
When it leaves the factory, your vehicle's
trailer socket is equipped with a permanent
power supply and a power supply that is
switched on via the ignition lock.
The permanent power supply is supplied via
trailer socket pin 9.
The power supply that is switched on via the
ignition lock is supplied via trailer socket pin
10.
Towing a trailer
Z
185