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Driving and operating207Select the relevant setting in Settings,
I Vehicle in the Colour-Info-Display.
Colour-Info-Display 3 117.
Vehicle personalisation 3 121.
Fault
Fault messages are displayed with a 9 on the top line of the Info-Display.
The rear view camera may not
operate properly when:
● The surrounding is dark.
● The sun or the beam of headlights is shining directly into
the camera lens.
● Ice, snow, mud, or anything else covers the camera lens. Clean
the lens, rinse it with water, and
wipe it with a soft cloth.
● The tailgate is not closed correctly.
● The vehicle is towing a trailer.
● The vehicle had a rear end accident.
● There are extreme temperature changes.Rear cross traffic alert
Additional to the rear view camera
3 205 , rear cross traffic alert warns of
cross traffic from left or right side
when driving rearwards. When cross
traffic is recognized and the rear view camera is activated, a warning
triangle with a direction arrow K
appears on the Colour-Info-Display,
showing the direction of the traffic.
Furthermore, three beeps will sound
from the speaker on the respective
side.
The radar distance sensors are
located sideways in the rear bumper.
9 Warning
The rear cross traffic alert does not
replace driver vision. Note that
objects that are outside sensors,
e.g. below the bumper or
underneath the vehicle, are not
displayed.
Pedestrians, children or animals
are not detected.
Do not reverse the vehicle by only
looking at the Info-Display and
check the surrounding behind and
around the vehicle before
reversing.
Activation
Rear cross traffic alert is
automatically activated together with
the rear view camera when reverse
gear is engaged.
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208Driving and operatingDetection zones
The system sensors cover a zone of
approx. 20 metres to the left or right
side behind the vehicle.
Deactivation Rear cross traffic alert is deactivatedtogether with the rear view camera
when a certain forward speed is
exceeded or if reverse gear is not
engaged for approx. 10 seconds.
Activation or deactivation of the rear
cross traffic alert can be set in the vehicle personalisation menu in the
Colour-Info-Display.
Select the relevant setting in Settings,
I Vehicle in the Colour-Info-Display.
Colour-Info-Display 3 117.
Vehicle personalisation 3 121.
Fault
The system may not operate properly
when:
● Ice, snow, mud, or anything else covers the sensors.
● The vehicle is towing a trailer.
● The vehicle had a rear end accident.
● There are extreme temperature changes.
Traffic sign assistant
Functionality The traffic sign assistant system
detects designated traffic signs via a
front camera and displays them in the
Driver Information Centre.
Traffic signs, which will be detected,
are:
Limit- and no passing signs
● speed limit
● no passing
● end of speed limit
● end of no passingRoad signs
Beginning and end of:
● motorways
● A-roads
● play streetsAdd on signs ● additional hints to traffic signs
● restriction of trailer towing
● tractor constraints
● wet warning
● ice warning
● direction arrows
Page 211 of 325

Driving and operating209Speed limit signs and no passing
signs are displayed in the Driver
Information Centre until the next
speed limit sign or end of speed limit
is detected or up to a defined sign
timeout.
Indication of multiple signs on the
display is possible.
An exclamation mark in a frame
indicates that there is an additional
sign detected which cannot be clearly
identified by the system.
A positive sign in an orange box
indicates that there is an additional
information which is explained on the
Traffic sign detection page in the
Driver Information Centre, see
"Display indication" below.
The system is active up to a speed of
125 mph depending on the lighting
conditions. At night the system is
active up to a speed of 100 mph.
As soon as the 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 on theTraffic sign detection page in the
Driver Information Centre.
On Baselevel display, select Settings
X by pressing MENU and select
Traffic sign detection entry with the
adjuster wheel on the turn signal lever
3 110.
Page 212 of 325

210Driving and operatingOn Midlevel and Uplevel display
select Info menu with the right
steering wheel buttons and press P
to select Traffic sign detection 3 110.
When another page on the Driver
Information Centre menu was
selected and 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.
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 or
9 on the steering wheel.
Illustration shows baselevel Driver
Information Centre.
Illustration shows midlevel or uplevel
Driver Information Centre.
When the setting page is displayed,
select Off or set alerts I to deactivate
alert function. Reactivate by selecting
On or alerts J.
When switching on the ignition, alert
function is deactivated.
Pop-up alert is displayed for approx.
eight seconds in the Driver
Information Centre.
Page 213 of 325

Driving and operating211System resetThe content of the traffic sign memory
can be cleared in the setting menu of the traffic sign assistant page by
selecting Reset and confirm by
pressing SET/CLR on the turn signal
lever or 9 on right steering wheel
control. 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
cleared up 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 or affected
by foreign items, e.g. stickers.
● 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
event, No Traffic Sign Detection
due to Weather is indicated on
the display.
● Traffic signs are incorrectly mounted or damaged.
● Traffic signs do not comply with the Vienna Convention on traffic
signs (Wiener Übereinkommen
über Straßenverkehrszeichen).Caution
The system is intended to help the driver within a defined speed
range to recognise certain traffic
signs. Do not ignore traffic signs
which are not displayed by the
system.
The system does not recognise
any other than the conventional
traffic signs that might give or end
a speed limit.
Do not let this special feature
tempt you into taking risks when
driving.
Always adapt speed to the road
conditions.
The driver assistance systems do not relieve the driver from full
responsibility for vehicle
operation.
Lane departure warning
The lane departure warning system
observes the lane markings between
which the vehicle is driving, via a front camera. The system detects lane
Page 214 of 325

212Driving and operatingchanges and warns the driver in the
event of an unintended lane change by visual and acoustic signals.
Criteria for the detection of an
unintended lane change are:
● No operation of turn signals.
● No brake pedal operation.
● No active accelerator operation or speeding-up.
● No active steering.
If the driver is active, no warning will
be issued.
ActivationThe lane departure warning system isactivated by pressing ). The
illuminated LED in the button
indicates that the system is switched
on. When the control indicator ) in
the instrument cluster illuminates
green, the system is ready to operate.
The system is only operable at
vehicle speeds above 35 mph and if
lane markings are available.
When the system recognises an
unintended lane change, the control
indicator ) changes to yellow and
flashes. Simultaneously a chime
sound is activated.
Deactivation
The 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 or affected by foreign items, e.g.
stickers.
● There are adverse environmental
conditions, e.g. heavy rain, snow,
direct sunlight or shadows.
The system cannot operate when no
lane marking is detected.
Page 215 of 325

Driving and operating213Fuel
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. The engine-specific
requirements are given in the engine
data overview 3 281. A country-
specific label at the fuel filler flap can
supersede the requirement.Caution
Do not use fuel or fuel additives
that contain metallic compounds
such as manganese-based
additives. This may cause engine
damage.
Caution
Use of fuel that does not comply to EN 228 or E DIN 51626-1 or
equivalent can lead to deposits or
engine damage.
Caution
Use of fuel with too low an octane
rating could lead to uncontrolled combustion and engine damage.
Fuel for diesel engines
Only use diesel fuel that complies
with EN 590.
In countries outside the European
Union use Euro-Diesel fuel with a
sulfur concentration below 50 ppm.
Caution
Use of fuel that does not comply to EN 590 or similar can lead to
engine powerloss, increased wear
or engine damage.
Do not use marine diesel oils, heating
oils, Aquazole and similar diesel-
water emulsions. Diesel fuels must
not be diluted with fuels for petrol
engines.
Fuel for liquid gas operation Liquid gas is known as LPG
(Liquefied Petroleum Gas) or under its French name GPL (Gaz de Pétrole
Liquéfié). LPG is also known as
Autogas.
LPG consists mainly of propane and
butane. The octane rating is between 105 and 115, depending on the
butane proportion. LPG is stored as a
liquid at a pressure of approximately
five to ten bar.
The boiling point depends on the
pressure and the mixing ratio. At
ambient pressure, it is between
-42 °C (pure propane) and -0.5 °C
(pure butane).
Page 216 of 325

214Driving and operatingCaution
The system works at an ambient
temperature of approx. -8 °C to
100 °C.
Full functioning of the LPG system
can only be guaranteed with liquid
gas which complies with the minimum
requirements of DIN EN 589.
Fuel selector
Press LPG to switch between petrol
and liquid gas operation as soon as
the required parameters (coolant
temperature, gas temperature and
minimum engine speed) have been
reached. The requirements are
usually fulfilled after approximately
60 seconds (depending on exterior
temperature) and the first firm press
on the accelerator. The status LED
shows the current operating mode.1 off:petrol operation1 flashes:checking conditions
for fuel transition to
liquid gas operation.
Illuminates if
conditions are fulfilled.1 illumi‐
nates:liquid gas operation1 flashes
five times
and extin‐
guishes:liquid gas tank is
empty or failure in
liquid gas system. A
message is displayed
in the Driver
Information Centre.
If the fuel tank is empty, the engine
will not start.
The selected fuel mode is stored and
reactivated at the next ignition cycle if conditions allow.
As soon as the liquid gas tank is
empty, petrol operation is
automatically engaged until the
ignition is switched off.
When switching automatically
between petrol or gas operation, a
brief delay of engine tractive power
may be noticeable.
Every six months, run the petrol tank
down until control indicator I or
Y illuminates, then refuel. This helps
maintain fuel quality and system
function for petrol operation.
Fill the tank completely at regular intervals to prevent corrosion in the
tank.
Faults and remedies
If gas mode is not possible, check the
following:
● Is there enough liquid gas present?
● Is there enough petrol present for
starting?