Removing The Ball Coupling; Storing The Ball Coupling; Trailer Power Supply - Mercedes-Benz A-Class Series Owner's Manual

Trailer towing
148
is in the vicinity of the wheel arch or the
underbody. You could otherwise trap yourself
or others.
As soon as you decouple the trailer, the unla-
den vehicle rises slightly. Make sure that you
or others are not injured in the process.
! Do not disconnect a trailer with an
engaged overrun brake. Otherwise, your
vehicle could be damaged by the rebound-
ing of the overrun brake.
Make sure that the transmission is in posi-
X
tion P.
Apply the parking brake.
X
Secure the trailer against rolling away.
X
Remove the trailer cable and decouple the
X
trailer.

Removing the ball coupling

Pull the protective cap off the lock in the
X
handwheel.
Use the key to unlock the lock in the hand-
X
wheel.
Hold the ball coupling. Pull the handwheel
X
away from the ball coupling and turn it
clockwise until it engages.
The green area on the ball coupling is
aligned with the red mark on the hand-
wheel.
Pull out the ball coupling downwards.
X
Clean the ball coupling if it is dirty.
X
Information on cleaning and care of the trailer
tow hitch can be found at (

Storing the ball coupling

G Risk of accident
Never transport an unsecured ball coupling in
the interior of the vehicle.
Otherwise, vehicle occupants could be
injured by the ball coupling being thrown if
you:
X
X
X
X
X
X
X
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.
! You can connect consumers with a power
page 217).
Y
The trailer's turn signal lamps are only guar-
anteed to function when bulbs are used.
You can obtain further information about
installing the trailer electrics from a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre.
brake sharply
R
change direction suddenly
R
have an accident
R
Vehicles without ECO start/stop func-
tion: open the stowage compartment on
the right of the luggage compartment.
Fold the trim downwards.
Vehicles with start/stop function: open
the luggage compartment floor.
Remove the protective cap from the ball
coupling recess.
Store the ball coupling with the key inser-
ted in the ball coupling recess.
Vehicles without ECO start/stop func-
tion: secure the ball coupling in place using
the fastening strap.
Fold the trailer power socket upwards.

Trailer power supply

rating of up to 240 W to the permanent
power supply and up to 180 W to the power
supply that is switched on via the ignition
lock.
You must not charge a trailer battery using
the power supply.