Mercedes-Benz GLS Operator's Manual page 228

Towing a trailer
226
Maintain a greater distance from the vehicle
R
in front than when driving without a trailer.
Avoid braking abruptly. If possible, brake gen-
R
tly at first to allow the trailer to run on. Then,
increase the braking force rapidly.
The values given for gradient-climbing capa-
R
bilities from a standstill refer to sea level.
When driving in mountainous areas, note that
the power output of the engine and, conse-
quently, the vehicle's gradient-climbing capa-
bility, decreases with increasing altitude.
Installing the ball coupling
G
WARNING
If the ball coupling is not correctly installed
and secured, it can come loose during the
journey and endanger other road users. There
is a risk of an accident and injury.
Always install and secure the ball coupling as
described. Before every journey, ensure that
the ball coupling is secured with the bolt and
the corresponding spring cotter.
G
WARNING
If the ball coupling is not installed correctly or
not secured with the bolt provided and the
corresponding spring cotter, the trailer may
come loose. There is a risk of an accident.
Always install and secure the ball coupling as
described. Before every journey, ensure that
the ball coupling is secured with the bolt and
the corresponding spring cotter.
G
WARNING
If the ball coupling is not installed and secured
correctly the trailer may come loose. There is
a risk of an accident.
Install and secure the ball coupling as descri-
bed in the ball coupling installation instruc-
tions. Make sure that the ball coupling is
installed and secured correctly before every
journey.
Pull protective cap : in the direction of the
X
arrow, out of the ball coupling recess.
Stow protective cap : so that it cannot be
X
thrown around.
Observe the loading guidelines (
and the safety notes regarding stowage
spaces ( page 300).
Y
Insert the ball coupling horizontally into ball
X
coupling recess ; in the direction of the
arrow until the holes in ball coupling = are in
line with the holes in ball coupling recess ?.
page 300)
Y