Page 212 of 283

210Driving and operatingThe permissible gross train weight
must not be exceeded. This weight is
specified on the identification plate
3 259.
Vertical coupling load The vertical coupling load is the load
exerted by the trailer on the coupling
ball. It can be varied by changing the
weight distribution when loading the
trailer.
The maximum permissible vertical
coupling load is specified on the
towing equipment identification plate
and in the vehicle documents.
Always aim for the maximum vertical
coupling load, especially in the case
of heavy trailers. The vertical coupling
load should never fall below 25 kg.
Rear axle load
When the trailer is coupled and the
towing vehicle fully loaded, the
permissible rear axle load (see
identification plate or vehicle
documents) may be exceeded by
60 kg , the gross vehicle weight rating
must not be exceeded. If thepermissible rear axle load is
exceeded, a maximum speed of
100 km/h applies.
Towing equipment Depending on version the vehicle canbe fitted with a detachable or a fixed
coupling ball bar.
Type ACaution
When operating without a trailer,
remove the coupling ball bar.
Fitting the coupling ball bar
1. Place the key in the lock and
unlock the coupling ball bar. Move
the lever to the rear position.
2. Clean the contact points with a soft clean cloth.
Page 213 of 283
Driving and operating2113. 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. Lock the coupling ball bar by turning the key. Remove the key
and close the protective flap.
5. Attach the trailer.
6. Fold the socket forward.
7. Connect the trailer plug to the socket.
8. 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. Open the protective flap and unlock the coupling ball bar with
the key.
5. Move the lever of the coupling ball
bar to the rear position. Remove
the coupling ball bar by pulling it.
Page 214 of 283
212Driving and operating
6.Move the lever of the coupling ball
bar to the front position.
Type B
1. Connect the trailer plug to the socket 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.
Page 215 of 283
Driving and operating2134. Connect the trailer plug to thesocket 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 3 166.
Page 234 of 283

232Vehicle careRemove the cover by pulling at the
top left, then at the right side.No.Circuit1Inductive charging, clutch
switch, selective ride control,
power steering, diesel exhaust
system, interior mirror4Horn6Windscreen washer7Power outlet rear10Door lockNo.Circuit12Diagnostic connector, power
supply transformer13Head-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 socketNo.Circuit24Parking assist, Infotainment
system, rear view camera, side
blind spot camera25Airbag26Steering angle sensor27Parking heater29Infotainment system31-32Power outlet34Parking assist, interior mirror35Diagnostic connector, headlight
range adjustment, heated wind‐ screen, climate control36Interior lights, USB port
Page 256 of 283

254Service and maintenanceService and
maintenanceGeneral information ...................254
Service information ..................254
Recommended fluids, lubricants
and parts .................................... 257
Recommended fluids and lubricants ................................ 257General 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 3 102.
Page 282 of 283

280Three-point seat belt .................... 58
Tools .......................................... 233
Tow bar....................................... 209
Towing ................................ 209, 247
Towing another vehicle .............249
Towing equipment .....................210
Towing the vehicle .....................247
Trailer coupling ........................... 209
Trailer stability assist .................213
Trailer towing ............................. 209
Transmission ............................... 19
Transmission display .................158
Tread depth ............................... 236
Trip odometer ............................ 100
Turn lights .......................... 103, 128
Tyre chains ................................ 238
Tyre deflation detection system . 235
Tyre designations ......................234
Tyre pressure ............................ 234
Tyre pressures ........................... 267
Tyre repair kit ............................. 238
U
Ultrasonic parking assist............. 186
Underseat storage .......................75
Upholstery .................................. 251
USB port ....................................... 96
Using this manual ..........................3V
Valet mode ................................. 113
Vehicle battery ........................... 219
Vehicle checks............................ 216
Vehicle data ................................ 261
Vehicle data recording and privacy ..................................... 271
Vehicle dimensions .................... 265
Vehicle identification number ....259
Vehicle jack ................................ 233
Vehicle locator lighting ...............132
Vehicle messages .....................117
Vehicle personalisation .............118
Vehicle security ............................ 36
Vehicle specific data ......................3
Vehicle storage ........................... 215
Vehicle tools ............................... 233
Vehicle unlocking ........................... 6
Ventilation ................................... 141
W
Warning chimes .........................117
Warning lights ............................. 100
Warning triangle .......................... 87
Washer and wiper systems .........15
Washer fluid ............................... 219
Wheel changing .........................241
Wheel covers ............................. 237
Wheels and tyres .......................234
Windows ....................................... 42Windscreen................................... 42
Windscreen wiper and washer ....93
Winter tyres ............................... 234
Wiper blade replacement ..........222
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