Driving and operating205Caution
Wipe off any overflowing fuel
immediately.
To close, turn the fuel filler cap
clockwise until it clicks.
Close the flap and allow it to engage.
Fuel filler cap
Only use genuine fuel filler caps.
Diesel-engined vehicles have special fuel filler caps.
Trailer hitch
General information
Only use towing equipment that has
been approved for your vehicle.
Entrust retrofitting of towing
equipment to a workshop. It may be
necessary to make changes that
affect the cooling system, heat
shields or other equipment.
The bulb outage detection function for
trailer brake light cannot detect a
partial bulb outage e.g. in case of four
bulbs with a power of 5 W each, the
function only detects lamp outage
when only a single 5 W lamp remains
or none remain.
Fitting of towing equipment could
cover the opening of the towing eye.
If this is the case use the coupling ball bar for towing. Always keep the
coupling ball bar in the vehicle to have
it on hand if needed.Driving characteristics and
towing tips
Before attaching a trailer, lubricate
the coupling ball. However, do not do
so if a stabiliser, which acts on the
coupling ball, is being used to reduce snaking movements.
During trailer towing do not exceed a
speed of 80 km/h. A maximum speed
of 100 km/h is only appropriate if an
oscillation damper is used and the
permissible gross trailer weight does
not exceed the vehicle’s curb weight.
For trailers with low driving stability
and caravan trailers, the use of an
oscillation damper is strongly
recommended.
If the trailer starts snaking, drive more
slowly, do not attempt to correct the
steering and brake sharply if
necessary.
When driving downhill, drive in the
same gear as if driving uphill and
drive at a similar speed.
Adjust tyre pressure to the value
specified for full load 3 263.
206Driving and operatingTrailer towingTrailer loadsThe permissible trailer loads are
vehicle and engine-dependent
maximum values which must not be
exceeded. The actual trailer load is
the difference between the actual
gross weight of the trailer and the
actual coupling socket load with the
trailer coupled.
The permissible trailer loads are
specified in the vehicle documents. In
general, they are valid for gradients
up to 12%.
The permissible trailer load applies
up to the specified incline and at sea
level. Since engine power decreases
as altitude increases due to the air
becoming thinner, therefore reducing
climbing ability, the permissible gross train weight also decreases by 10%
for every 1000 metres of altitude. The
gross train weight does not have to be reduced when driving on roads with
slight inclines (less than 8%, e.g.
motorways).The permissible gross train weight
must not be exceeded. This weight is
specified on the identification plate
3 254.
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
Driving and operating2071. Move the lever to the rearposition.
2. Clean the contact points with asoft clean cloth.
3. 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. Connect the trailer plug to the socket.
6. 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.
208Driving and operating
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.
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.
Driving and operating2093.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 3 164.
228Vehicle careNo.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 portVehicle tools
Tools
Vehicles with spare wheel
Open the cover of the footwell storage
3 74.
250Service and maintenanceGeneral informationService informationIn 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 3 103.
Group 1 consists of the following countries: France, Germany, Italy,
Spain, Austria, Benelux, Portugal,
Switzerland, Denmark, Greece,
Iceland, Albania, Bosnia, Bulgaria,
Croatia, Hungary, Kosovo, Latvia,
Lithuania, Macedonia, Poland, Czech
Republic, Serbia, Slovak Republic,
Slovenia, Estonia, Sweden, Norway,
Finland, United Kingdom, Ireland.
Group 2 consists of the following
countries: Israel, South Africa.
Group 3 consists of the following countries: Algeria, Morocco, Chile.
276Tools .......................................... 228
Tow bar....................................... 205
Towing ................................ 205, 243
Towing another vehicle .............244
Towing equipment .....................206
Towing the vehicle .....................243
Trailer coupling ........................... 205
Trailer stability assist .................209
Trailer towing ............................. 206
Transmission ............................... 18
Transmission display .................156
Tread depth ............................... 232
Trip odometer ............................ 101
Turn lights .......................... 104, 125
Tyre chains ................................ 233
Tyre deflation detection system . 231
Tyre designations ......................230
Tyre pressure ............................ 230
Tyre pressures ........................... 263
Tyre repair kit ............................. 234
U
Ultrasonic parking assist............. 185
Underseat storage .......................74
Upholstery .................................. 247
Using this manual ..........................3
V Valet mode ................................. 114
Vehicle battery ........................... 215
Vehicle checks............................ 212Vehicle data ................................ 256
Vehicle data recording and privacy ..................................... 268
Vehicle detected ahead ..............111
Vehicle dimensions .................... 262
Vehicle Identification Number ....254
Vehicle jack ................................ 228
Vehicle locator lighting ...............130
Vehicle messages .....................118
Vehicle personalisation .............119
Vehicle security ............................ 35
Vehicle specific data ......................3
Vehicle storage ........................... 211
Vehicle tools ............................... 228
Vehicle unlocking ........................... 6
Vehicle weight ........................... 260
Ventilation ................................... 139
W
Warning chimes .........................118
Warning lights ............................. 100
Warning triangle .......................... 86
Washer and wiper systems .........14
Washer fluid ............................... 215
Wheel changing .........................237
Wheel covers ............................. 233
Wheels and tyres .......................229
Windows ....................................... 41
Windscreen................................... 41
Windscreen wiper and washer ....91Winter tyres ............................... 229
Wiper blade replacement ..........217