Mercedes-Benz E-Class Saloon Owner's Manual page 267

Wait until the ball neck has locked in place.
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The ball neck is securely locked in place
when indicator lamp 1 lights up continu‐
ously.
If the ball neck is not securely locked in
place, indicator lamp 1 flashes and the
Check trailer hitch lock display message
appears on the multifunction display.
To retract: pull button 2.
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Indicator lamp 1 will flash and the
coupling extending... display message will
appear on the multifunction display.
The ball neck will retract fully electrically.
Wait until the ball neck has locked in place.
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The ball neck is securely locked in place
once indicator lamp 1 goes out.
If the ball neck is not securely locked in
place, indicator lamp 1 flashes and the
Check trailer hitch lock display message
appears on the multifunction display.
Observe the information on the displays on the
instrument cluster:
Warning and indicator lamps
R
( page 547)
/
Display messages ( page 493)
/
R
Coupling up / uncoupling a trailer
Trailer
& WARNING Risk of injury from the vehicle
level being changed
Vehicles with level control system: the
vehicle level may be changed unintentionally,
e.g. by other persons. You may become trap‐
ped if you couple up or uncouple a trailer
while the vehicle level is changing. In addi‐
tion, other people could become trapped if
their limbs are between the vehicle body and
the tyres or underneath the vehicle.
When coupling up or uncoupling a trailer,
make sure that:
The doors or tailgate are not opened or
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closed.
You do not initiate the level control sys‐
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tem and do not operate the DYNAMIC
SELECT switch.
Do not lock or unlock the vehicle.
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Driving and parking 265