Mercedes-Benz CLS Owner's Manual page 241

238 Driving and parking
Drive Away Assist
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Cross Traffic Alert
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Reversing camera
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360° camera
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AIR BODY CONTROL
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Coupling up a trailer
* NOTE Damage to the starter battery due
to full discharge
Charging the trailer battery using the power
supply of the trailer can damage the starter
battery.
Do not use the vehicle's power supply
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to charge the trailer battery.
Remove the cover cap from the ball head and
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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 cap.
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Insert the plug with lug 1
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the socket.
Turn bayonet coupling 2 to the right as far
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as it will go.
Let the cap engage.
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Secure the cable to the trailer with cable ties
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(only if you are using an adapter cable).
Make sure that the cable is always slack for
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ease of movement during cornering.
Under the following conditions, a message may
appear on the multifunction display even if the
trailer has been connected correctly:
LEDs have been installed in the trailer light‐
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ing system.
The current has fallen below the trailer light‐
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ing system's minimum current (50 mA).
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Accessories can be connected to the perma‐
nent power supply up to 180 W and to the
power supply that is switched on via the igni‐
tion lock.
in groove 3 on
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.