Mercedes-Benz A-Class 2015 Owner's Manual page 224

222 Driving and parking
& WARNING Risk of injury from ball neck
swinging outwards
The ball neck may swing outwards when
unlocking or when it has not been properly
engaged.
There is a risk of injury within the ball neck's
range of movement!
Unlock the ball neck only when its
#
range of movement is unobstructed.
Always be sure the ball neck is engaged
#
when folding inwards.
Requirements:
Before folding the ball neck out/in, make sure of
the following:
Shift the transmission to position j or i.
R
The range of movement is clear.
R
Only when folding in: ensure trailer cables
R
or adapter plugs have been removed.
Folding the ball neck out
Pull release switch 2 until the ball neck
#
unlocks.
The ball neck folds out from under the rear
bumper.
Indicator lamp 1 flashes.
Pull the ball neck in the direction of the
#
arrow until it engages audibly in a vertical
position.
Indicator lamp 1 in the ball neck release
switch goes out.
If the ball neck is not securely locked in
place, the Trailer coupling Check
message appears on the multifunction dis‐
play.
lockdisplay