Mercedes-Benz E-Class 2010 Owner's Manual page 192

level. When driving in mountainous areas,
note that the power output of the engine,
and consequently the vehicle's gradient-
climbing capability, decrease with increas-
ing altitude.
If the trailer swings from side to side:
Do not accelerate.
X
Do not counter-steer.
X
Brake if necessary.
X
Folding in the ball coupling
i
Fold the ball coupling back in if you are
not using the trailer tow hitch.
G Risk of injury
Make sure that no persons or animals are in
the pivoting range of the ball coupling. Other-
wise, they could be injured.
Place the protective cap on the ball cou-
X
pling.
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 ;.
Pull out release wheel ;.
X
Turn release wheel ; anti-clockwise.
X
The ball coupling unlocks and lowers. Indi-
cator 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
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.
Trailer towing
Z
189