Page 209 of 281
Driving and operating2073. Insert the coupling ball bar in theopening and push firmly up to the
stop.
Secure the coupling ball bar
correctly by moving the lever to
the locked position, shown in the
picture.
4. Attach the trailer.
5. Fold the socket forward.
6. Connect the trailer plug to the socket.
7. Attach the breakaway stoppingcable to the eye on the carrier.
9 Warning
Towing a trailer is permitted only
when a coupling ball bar is fitted correctly. If the coupling ball bardoes not engage correctly, seekthe assistance of a workshop.
Dismounting coupling ball bar
1. Disconnect the trailer plug.
2. Unfasten the breakaway stopping
cable.
3. Remove the trailer.
4. Move the lever of the coupling ball
bar to the rear position. Remove
the coupling ball bar by pulling it.
5. Move the lever of the coupling ball
bar to the front position.
Page 210 of 281
208Driving and operatingType B
1. Connect the trailer plug to thesocket and fasten the breakaway
stopping cable to the eye on the
carrier.
2. Attach the trailer.
Type C
1. Remove the safety splint.
2. Pull the lever and open the towing
ring.
3. Attach the trailer, close the towing
ring and fix the splint.
4. Connect the trailer plug to the socket and attach the breakaway
stopping cable to the eye on the
carrier.
Trailer stability assist If the system detects snaking
movements, engine power is reduced
and the vehicle / trailer combination is
selectively braked until the snaking
ceases. While system is working keep
steering wheel as still as possible.
Trailer stability assist is a function of
the Electronic Stability Control 3 163.
Page 229 of 281
Vehicle care227No.Circuit1Inductive charging, clutch
switch, selective ride control,
power steering, diesel exhaust
system, interior mirror4Horn6Windscreen washer7Power outlet rear10Door lock12Diagnostic connector, power
supply transformerNo.Circuit13Head-up display, climate
control, Infotainment system14Anti-theft alarm system, tele‐
matic unit15Automatic transmission, instru‐
ment cluster, climate control16Starter, power supply trans‐
former17Instrument cluster19Trailer socket, steering wheel
controls21Anti-theft system, power button22Rear view camera, rain and light sensor23Seat belt reminder, special
vehicle control module, start-
stop, trailer socket24Parking assist, Infotainment
system, rear view camera, side
blind spot camera25AirbagNo.Circuit26Steering angle sensor27Parking heater29Infotainment system31-32Power outlet34Parking assist, interior mirror35Diagnostic connector, headlight
range adjustment, heated wind‐ screen, climate control36Interior lights, USB port
Page 251 of 281
Service and maintenance249General information
Service information
In order to ensure economical and
safe vehicle operation and to
maintain the value of your vehicle, it
is of vital importance that all
maintenance work is carried out at the proper intervals as specified.
The detailed, up-to-date service
schedule for your vehicle is available
at the workshop.
Severe operating conditions exist if one or more of the following
circumstances occur frequently: Cold starting, stop and go operation, e.g.
for taxis and police vehicles, trailer
operation, mountain driving, driving
on poor and sandy road surfaces,
increased air pollution, presence of
airborne sand and high dust content,
driving at high altitude and large
variations of temperature.
Under these severe operating
conditions, certain service work may
be required more frequently than the
regular service interval indicated inthe service display. Contact a
workshop for customised service
schedules.
Service display 3 100.
Page 280 of 281

278Towing equipment .....................206
Towing the vehicle .....................242
Trailer coupling ........................... 205
Trailer stability assist .................208
Trailer towing ............................. 205
Transmission ............................... 17
Transmission display .................155
Tread depth ............................... 231
Trip odometer .............................. 98
Turn lights .......................... 101, 125
Tyre chains ................................ 233
Tyre deflation detection system . 230
Tyre designations ......................229
Tyre pressure ............................ 229
Tyre pressures ........................... 263
Tyre repair kit ............................. 233
U
Ultrasonic parking assist............. 183
Underseat storage .......................72
Upholstery .................................. 247
USB port ....................................... 92
Using this manual ..........................3
V Valet mode ................................. 111
Vehicle battery ........................... 215
Vehicle checks............................ 211
Vehicle data ................................ 256
Vehicle data recording and privacy ..................................... 269Vehicle detected ahead..............107
Vehicle dimensions .................... 261
Vehicle Identification Number ....254
Vehicle jack ................................ 228
Vehicle locator lighting ...............129
Vehicle messages .....................115
Vehicle personalisation .............116
Vehicle security ............................ 34
Vehicle specific data ......................3
Vehicle storage ........................... 210
Vehicle tools ............................... 228
Vehicle unlocking ........................... 6
Ventilation ................................... 138
W
Warning chimes .........................115
Warning lights ............................... 97
Warning triangle .......................... 84
Washer and wiper systems .........13
Washer fluid ............................... 214
Wheel changing .........................236
Wheel covers ............................. 232
Wheels and tyres .......................229
Windows ....................................... 40
Windscreen................................... 40
Windscreen wiper and washer ....89
Winter tyres ............................... 229
Wiper blade replacement ..........216
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