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Driving and operating255The ultrasonic parking sensors can
be activated or deactivated in the
settings menu in the Info Display.
Notice
Attached parts in the detection area
cause system malfunction.
Activation
The rear parking assist is activated
when reverse gear is engaged. The
front-rear parking assist is activated
when a gear is engaged. Readiness
for operation is indicated by a brief
acoustic signal.
IndicationThe interval between the acoustic
signals becomes shorter as the
vehicle gets closer to the obstacle.
When the distance is less than
30 cm, the signal is continuous.
Additionally, the distance to obstacles is displayed by changing distance
lines in the Info Display.
Deactivation
The system can be deactivated by
pressing =. The LED in the button
illuminates when deactivated.
Depending on version, the system
can also be deactivated in the
settings menu in the Info Display.
Manual deactivation
The system must be deactivated
before towing or if the sensors are
damaged.
Automatic deactivation
The system will automatically be
deactivated when:
● the vehicle speed is above 6 mph
● selector lever in N
● depending on version, when the vehicle is stationary for more than
approx. 5 seconds and an
obstacle is detected
Fault
If the system detects an operating
fault, a continuous acoustic alarm will sound for approx. 3 seconds. Consult
a workshop to have the cause of the
fault remedied.
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256Driving and operatingCaution
When reversing, the area should
be free from obstacles which could impact on the underside of the
vehicle.
Impact to the rear axle, which may
not be visible, could lead to
uncharacteristic changes in the
vehicle handling. In the event of
such an impact, consult a
workshop.
Basic notes on parking assist
system
9 Warning
Under certain circumstances,
various reflective surfaces on
objects or clothing as well as
external noise sources may cause the system to fail to detect
obstacles.
Special attention must be paid to
low obstacles which can damage
the lower part of the bumper.
Caution
Performance of the sensors can
be reduced when sensors are
covered, e.g. by ice or snow.
Performance of the parking assist
system can be reduced due to
heavy loading.
Special conditions apply if there
are taller vehicles involved (e.g.
off-road vehicles, mini vans,
vans). Object identification in the
upper part of these vehicles
cannot be guaranteed.
Objects with a very small reflection
cross-section, e.g. objects of
narrow size or soft materials, may
not be detected by the system.
The parking assist system will not
detect objects which are out of the detection range of the sensors.
Side blind spot alert
The side blind spot alert system
detects and reports objects on either
side of the vehicle, within a specified
blind spot zone. The system displays
a visual alert in each exterior mirror,
when detecting objects that may not
be visible in the interior and exterior
mirrors.
Side blind spot alert uses some of the
parking assist sensors which are
located in the front and rear bumper
on both sides of the vehicle.9 Warning
Side blind spot alert does not
replace driver vision.
The system does not detect:
● vehicles outside the side blind zones which may be rapidly
approaching
● pedestrians, cyclists or animals
Before changing a lane, always
check all mirrors, look over the
shoulder and use the turn signal.
Activation
The system is activated when the
speed of the vehicle is between
approx. 19 mph and 87 mph.
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Driving and operating257Deactivation
To deactivate the system, press .
with the ignition on. The LED in the
button illuminates when deactivated.
To reactivate the system, press .
again. The LED in the button
extinguishes.
Functionality
When the system detects a vehicle in the side blind zone while driving
forwards, an LED will illuminate in the
relevant exterior mirror.
The LED comes on immediately when being passed.
The LED comes on after a delay when
passing another vehicle slowly.
The LED flashes when the turn lights
are activated and a vehicle is
detected.
Operation conditions
The following conditions must be
fulfilled for proper operation:
● all vehicles are moving in the same direction and in adjacent
lanes
● the speed of your vehicle is between 19 mph and 87 mph
● the traffic flow is normal
● driving on a straight or slightly curved road
● the vehicle is not pulling a trailer ● the sensors are not covered by mud, ice or snow
● the warning zones in the exterior mirrors or the detection zones in
front and rear bumper are not
covered
No alert will be given in the following
situations:
● in the presence of non-moving objects, e.g. parked vehicles,
barriers, street lamps, road signs
● with vehicles moving in the opposite direction
Page 260 of 351

258Driving and operating● driving on a winding road or asharp corner
● when passing or being passed by
a very long vehicle, e.g. lorry,
coach, which is at the same time
detected at the rear in the blind
spot angle and present in the
driver's forward field of vision
● in very heavy traffic, vehicles detected in front and behind are
confused with a lorry or a
stationary object
● when passing too quickly
Fault
In the event of a fault, a
corresponding message will be
displayed in the instrument cluster.
Have the cause of the fault remedied
by a workshop.
Rear view camera
The rear view camera assists the
driver when reversing by displaying a view of the area behind the vehicle in
either the interior mirror or the Info
Display.9 Warning
The rear view camera does not
replace driver vision. Note that
objects that are outside the
camera's field of view, e.g. below
the bumper or underneath the
vehicle, are not displayed.
Do not reverse the vehicle by only looking at the display and checkthe surrounding area behind and
around the vehicle before
reversing.
The camera is typically installed on
the rear doors, beneath the number
plate moulding.
The area displayed by the camera is
limited. The distance of the image that
appears on the display differs from
the actual distance.
Rear view display 3 40.
Notice
To achieve the optimum visibility, the rear view camera must not be
obscured by dirt, snow or ice.
Activation
Interior mirror display
The interior mirror display is
automatically activated when reverse
gear is engaged. An audible signal
confirms activation.
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Driving and operating259Info Display
In vehicles without interior mirror
display, the rear view camera screen
is shown on the Info Display.
Trajectory lane display image (1)
Depending on version, the trajectory
lane (1) of the vehicle is shown in blue
on the Info Display. It shows the path of the vehicle in accordance with the
steering angle.
Fixed lane display image (2)
The fixed lane display (2) shows the
path of the vehicle if the wheels are
kept straight.
Guide lines (3, 4, 5) are used together
with the fixed lane display (2) and
indicate the distance behind the
vehicle.The guide line intervals are as
follows:3 (red):30 cm4 (yellow):70 cm5 (green):150 cmSettings
Settings, e.g. brightness, can be set
via the Infotainment system. Refer to
Infotainment manual for further
information.
Deactivation
The camera is deactivated after a
delay if reverse gear is not engaged.
Fault
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
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260Driving and operating● the rear doors are not closedcorrectly
● the vehicle had a rear-end accident
● there are extreme temperature changes
Lane departure warning The lane departure warning system
uses a front camera to observe the
lane markings between which the
vehicle is driving. The system detects
lane changes and warns the driver in
the event of an unintended lane
change via visual and acoustic
signals.
Criteria for the detection of an
unintended lane change are:
● no operation of turn lights
● no active steering
If the driver is performing these
actions, no warning will be issued.Activation
The lane departure warning system is activated by pressing Q in the centre
console. A corresponding message
appears in the Driver Information
Centre to indicate that the system is
switched on.
When Q 3 100 illuminates in the
Driver Information Centre, the system is ready to operate 3 104.
Q extinguishes when the system is
not ready to warn the driver.
The system is only operable at
vehicle speeds above approx.
37 mph and if lane markings are
available and detected.
If the turn lights are not operated
when changing lanes, i.e. an
unintended lane change is detected,
control indicator Q flashes together
with a warning chime to alert the
driver.
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Driving and operating261DeactivationThe system is deactivated by
pressing Q. A corresponding
message appears in the Driver
Information Centre to indicate that the
system is switched off.
At speeds below approx. 37 mph the
system is inoperable.
Operation hints The lane departure warning systemmay not operate properly when:
● The windscreen is not clean.● There are adverse environmental
conditions like heavy rain, snow,
direct sunlight or shadows.
● Lane departure is very fast.
● Acceleration is very strong.
● Bends are tight.
● Driving continuously on a line.
The system cannot operate when no
lane marking is detected.Fault
In the event of a fault in the system, a warning message appears in the
Driver Information Centre (possibly in combination with control indicator
j ).
Seek the assistance of a workshop. Driver Information Centre 3 104.Fuel
Fuel for diesel engines
The Diesel engines are compatible
with bio-fuels that conform to current and future European standards and
can be obtained from filling stations:
Diesel fuel that meets standard
EN590 mixed with a biofuel that
meets standard EN14214 (possibly
containing up to 7% Fatty Acid Methyl
Ester).
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262Driving and operatingDiesel fuel that meets standard
EN16734 mixed with a biofuel that
meets standard EN14214 (possibly
containing up to 10% Fatty Acid
Methyl Ester).
Paraffinic Diesel fuel that meets
standard EN15940 mixed with a
biofuel that meets standard
EN14214 (possibly containing up to
7% Fatty Acid Methyl Ester).
If travelling in countries outside the
European Union, occasional use of Euro-Diesel fuel with a sulphur
concentration below 50 ppm is
possible.
Caution
Frequent usage of diesel fuel containing more than 15 ppm
sulphur will cause severe engine
damage.
Caution
Use of fuel that does not comply to EN 590 or similar can lead to
engine powerloss, increased wear
or engine damage and may affect
your warranty.
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. Do not use additives.
The flow and filterability of diesel fuels are temperature-dependent. When
temperatures are low, refuel with
diesel fuel with guaranteed winter
properties.
Diesel fuel system bleeding 3 275.
Low temperature operation
At temperatures below 0 °C, some
diesel products with biodiesel blends
may clog, freeze or gel, which may
affect the fuel supply system. Starting
and engine operation may not work
properly. Make sure to fill winter
grade diesel fuel at ambient
temperatures below 0 °C.
Arctic grade diesel fuel can be used
in extreme cold temperatures below
-20 °C. Using this fuel grade in warm
or hot climates is not recommended
and may cause engine stalling, poor starting or damage to the fuel
injection system.
Refuelling9 Danger
Before refuelling, switch off engine
and any external heaters with
combustion chambers. Switch off
any mobile phones.
Follow the operating and safety
instructions of the filling station
when refuelling.