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174Driving and operatingAn exclamation mark in a frame
indicates that there is an add on sign
detected which cannot be recognised
by the system.
The system is active up to a speed of 124 mph depending on the lighting
conditions. At night the system is
active up to a speed of 99 mph.
As soon as vehicle speed becomes
slower than 34 mph the display will be
reset and the content of the traffic sign
page will be cleared, e.g. when
entering a city zone. The next
recognized speed indication will be
displayed.
Display indication
Traffic signs are displayed in the
Traffic sign detection page in the
Driver Information Centre.
Select Settings X by pressing
MENU and select Traffic sign
detection entry via the adjuster wheel
on the turn signal lever 3 93.
When another function in the Driver
Information Centre menu was
selected then Traffic sign detection
page is chosen again, the last
recognised traffic sign will be
displayed.
Alert function
Once activated, speed limit and no
passing signs are displayed as pop-
up alerts in the Driver Information
Centre.
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Driving and operating175
The alert function can be activated or
deactivated in the setting menu of the
traffic sign assistant page by pressing SET/CLR on the turn signal lever.
When the setting page is displayed,
select Off to deactivate alert function.
Reactivate by selecting On.
When switching on the ignition, alert
function is deactivated.
Pop-up indication is displayed for
approx. 8 seconds in the Driver
Information Centre.
System reset
The content of the traffic sign memory can be cleared in the setting menu of
the traffic sign assistant page by
pressing and holding SET/CLR on the
turn signal lever. Upon successful reset, a chime will sound and the
following symbol is indicated until the next traffic sign is detected.
In some cases, traffic sign assistant is
reset automatically by the system.
Fault
The traffic sign assistant system may
not operate correctly when:
● The area of the windscreen, where the front camera is
located, is not clean.
● Traffic signs are completely or partially covered or difficult to
discern.
● There are adverse environmental
conditions, e.g. heavy rain, snow,direct sunlight or shadows. In this
Page 179 of 263
Driving and operating177
DeactivationThe system is deactivated by
pressing ), the LED in the button
extinguishes.
At speeds below 35 mph the system
is inoperable.
Fault
The lane departure warning system may not operate properly when:
● the windscreen is not clean
● there are adverse environmental conditions like heavy rain, snow,
direct sunlight or shadows
The system cannot operate when no
lane marking is detected.Fuel
Fuel for petrol engines Only use unleaded fuel that complies
with European standard EN 228 or
E DIN 51626-1 or equivalent.
The engine is capable of running with
fuel that contains up to 10% ethanol
(e.g. named E10).
Use fuel with the recommended
octane rating. A lower octane rating
can reduce engine power and torque
and slightly increases fuel
consumption.Caution
Do not use fuel or fuel additives
that contain metallic compounds
such as manganese-based
additives. This may cause engine
damage.
Page 181 of 263

Driving and operating179
The fuel filler flap can only be opened
if the vehicle is unlocked. Release the
fuel filler flap by pushing the flap.
To open, turn the cap slowly
anticlockwise.
The fuel filler cap can be retained in
the bracket on the fuel filler flap.
To refuel, fully insert the pump nozzle
and switch it on.
After the automatic cut-off, the tank can be topped up by operating the
pump nozzle a maximum of two more
times.Caution
Wipe off any overflowing fuel
immediately.
To close, turn the fuel filler cap to the right until it clicks.
Close the flap and allow it to engage.
Vehicles with misfuel inhibitor
9 Warning
Do not try to open the flap of the
fuel filler neck manually on
vehicles with misfuel inhibitor.
Disregard could lead to trapping of
the fingers.
Vehicles with a selective catalytic
reduction system are equipped with a
misfuel inhibitor.
The misfuel inhibitor ensures that the flap of the fuel filler neck can only be
opened by using a nozzle for diesel
fuel or a funnel for emergency
refilling.
Turn the fuel filler cap slowly
anticlockwise.
The cap can be retained in the
bracket on the fuel filler flap.
Place the nozzle in a straight line to the filler neck and press with slight
force to insert.
Page 182 of 263

180Driving and operatingIn case of an emergency, refill with a
canister. A funnel must be used to
open the cap of the filler neck.
The funnel is located in the load
compartment.
Place the funnel in a straight line to
the filler neck and press with slight
force to insert.
Use the funnel to fill the diesel fuel into the filler neck.
After topping-up, put the funnel into
the plastic bag and stow it in the
storage compartment.
Selective catalytic reduction system
3 142.
Fuel filler cap
Only use genuine fuel filler caps. Diesel-engined vehicles have special fuel filler caps.
Fuel consumption - CO 2-
Emissions The fuel consumption (combined) is
within a range of 39 to 54 mpg.
The CO 2 emission (combined) is
within a range of 172 to 138 g/km.
For the values specific to your
vehicle, refer to the EEC Certificate of
Conformity provided with your vehicle or other national registration
documents.
General information The official fuel consumption and
specific CO 2 emission figures quoted
relate to the EU base model with
standard equipment.
Fuel consumption data and CO 2
emission data are determined
according to regulation
R (EC) No. 715/2007 (in the latestapplicable version), taking into
consideration the vehicle weight in
running order, as specified by the
regulation.
The figures are provided only for the purpose of comparison between different vehicle variants and mustnot be taken as a guarantee for the
actual fuel consumption of a
particular vehicle. Additional
equipment may result in slightly
higher results than the stated
consumption and CO 2 figures.
Furthermore, fuel consumption is dependent on personal driving style
as well as road and traffic conditions.
Page 183 of 263

Driving and operating181Trailer 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 4 x
5 Watt bulbs, the function only detects
lamp outage when only a single
5 Watt 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.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.
For trailers with low driving stability
and caravan trailers with a permitted
gross vehicle weight of more than
1200 kg the use of a stabiliser is
strongly recommended when driving
above 50 mph.
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 3 246.Trailer towing
Trailer loads The 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 max. 12%.
The permitted trailer load applies up to the specified incline and up to an
altitude of 1000 metres above 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 additional
altitude. The gross train weight does
not have to be reduced when driving
on roads with slight inclines (less than
8%, e.g. motorways).
Page 188 of 263

186Vehicle careVehicle careGeneral Information...................187
Accessories and vehicle modifications .......................... 187
Vehicle storage ........................187
End-of-life vehicle recovery .....188
Vehicle checks ........................... 188
Performing work ......................188
Bonnet ..................................... 188
Engine oil ................................. 189
Engine coolant ......................... 190
Washer fluid ............................ 191
Brakes ..................................... 192
Brake fluid ............................... 192
Vehicle battery ......................... 192
Diesel fuel system bleeding .....194
Wiper blade replacement ........194
Bulb replacement .......................194
Halogen headlights ..................195
Adaptive forward lighting .........196
Fog lights ................................. 197
Front turn signal lights .............198
Tail lights ................................. 199
Side turn signal lights ..............201
Number plate light ...................201Interior lights ............................ 202
Instrument panel illumination ...202
Electrical system ........................202
Fuses ....................................... 202
Engine compartment fuse box . 203
Instrument panel fuse box .......205
Load compartment fuse box ....206
Vehicle tools .............................. 208
Tools ........................................ 208
Wheels and tyres .......................209
Winter tyres ............................. 209
Tyre designations ....................209
Tyre pressure monitoring
system .................................... 210
Tyre pressure .......................... 213
Tread depth ............................. 214
Changing tyre and wheel size . 215
Wheel covers ........................... 215
Tyre chains .............................. 215
Tyre repair kit .......................... 216
Wheel changing .......................219
Spare wheel ............................ 221
Jump starting ............................. 225
Towing ....................................... 226
Towing the vehicle ...................226
Towing another vehicle ...........227Appearance care .......................228
Exterior care ............................ 228
Interior care ............................. 230
Page 190 of 263
188Vehicle care● Check the coolant level.
● Since the durability of AdBlue is limited to two years, fluid should
be exchanged if it is too old. Seek the assistance of a workshop.
● Fit the number plate if necessary.
End-of-life vehicle recovery
Information on end-of-life vehicle
recovery centres and the recycling of
end-of-life vehicles is available on our website, where legally required. Only
entrust this work to an authorised
recycling centre.Vehicle checks
Performing work9 Warning
Only perform engine compartment
checks when the ignition is off.
The cooling fan may start
operating even if the ignition is off.
9 Danger
The ignition system and Xenon
headlights use extremely high
voltage. Do not touch.
Bonnet
Opening
Pull the release lever and return it to
its original position.