Mercedes-Benz E-Class Coupe 2017 Owner's Manual page 222

Coupling up a trailer
* NOTE Damage to the battery due to full
discharge
Charging the trailer battery using the power
supply of the trailer can damage the battery.
Do not use the power supply to charge
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the trailer battery.
Remove the protective covering from the ball
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head and store it in a safe place.
Position the trailer on a level surface behind
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the vehicle and couple it up to the vehicle.
Open the socket cover.
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Insert the plug connector with lug
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groove 3 on the socket.
Turn bayonet coupling 2 clockwise to the
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stop.
Let the cover engage.
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Secure the cable to the trailer with cable ties
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(if you are using an adapter cable).
Make sure that cable is always slack for ease
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of movement when cornering.
Check the trailer lighting system. Push the
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combination switch upwards/downwards
and check whether the corresponding turn
signal light on the trailer is flashing.
A display message may appear in the multifunc‐
tion display even if the trailer has been connec‐
ted correctly:
LEDs have been installed on the trailer light‐
R
ing system
the current has fallen below the trailer light‐
R
ing system's minimum current (50 mA)
% Accessories can be connected to the perma‐
nent power supply and the power supply that
1 into
is switched on via the ignition lock with max‐
imum power consumptions of 180 W.
Uncoupling a trailer
& WARNING Risk of being crushed and
becoming trapped when uncoupling a
trailer
When uncoupling a trailer with an engaged
inertia-activated brake, your hand may
become trapped between the vehicle and the
trailer drawbar.
Do not uncouple trailers with an
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engaged overrun brake.
& WARNING Risk of becoming trapped
when disconnecting the trailer cable
Vehicles with level control system: the
vehicle lowers when the trailer cable is dis‐
connected.
Driving and parking 219