
Problems with PARKTRONIC
Problem Possible causes/consequences and
0001 Solutions
Only the red segments
in the PARKTRONIC
warning displays are lit.
You also hear a warning
tone for approximately
two seconds.
PARKTRONIC is
deactivated after
approximately five
seconds, and the
indicator lamp in the
PARKTRONIC button
lights up. PARKTRONIC has malfunctioned and has switched off.
X
If problems persist, have PARKTRONIC checked at a qualified
specialist workshop. Only the red segments
in the PARKTRONIC
warning displays are lit.
PARKTRONIC is
deactivated after
approximately five
seconds. The PARKTRONIC sensors are dirty or there is interference.
X
Cleant he PARKTRONIC sensors (Y page 374).
X Switch the ignition back on. The problem may be caused by an external source of radio or
ultrasound waves.
X
See if PARKTRONIC functions in a different location. Active Parking Assist
General notes Active Parking Assist is an electronic parking
aid with ultrasound. It measures the road on
both sides of the vehicle.
Aparking symbol
indicates a suitable parking space. Active
steering interventio ncan assis tyou during
parking.
You may also use PARKTRONIC
(Y page 213).
Important safety notes Active Parking Assist is merely an aid. It is not
a replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking
and exiting a parking space. When
maneuvering, parking or pulling out of a
parking space, make sure that there are no persons, animals or object
sinthe area in
which you are maneuvering.
When PARKTRONIC is switched off, Active
Parking Assist is also unavailable. G
WARNING
While parking or pulling out of a parking
space, the vehicle swings out and can drive
onto areas of the oncoming lane. This could
result in a collision with another road user.
There is a risk of an accident.
Pay attention to other road users. Stop the
vehicle if necessary or cancel the Active
Parking Assist parking procedure.
! If unavoidable, you should drive over
obstacles such as curbs slowly and not at
a sharp angle. Otherwise, you may damage
the wheels or tires. 216
Driving systemsDriving and parking

Once you have exited the parking space
completely, the steering wheel is moved to
the straight-ahead position. You hear a tone
and the
Park Assist Switched Off message appears in the multifunction
display. You will then have to steer and merge
into traffic on your own. PARKTRONIC is still
available. You can take over the steering,
before the vehicle has exited the parking
space completely. This is useful, for example
when you recognize that it is already possible
to pull out of the parking space.
Canceling Active Parking Assist
X
Stop the movement of the multifunction
steering wheel or steer yourself.
Active Parking Assist will be canceled at
once. The Park Assist Canceled message appears in the multifunction
display.
or
X Press the PARKTRONIC button on the
center console (Y page 215).
PARKTRONIC is switched off and Active
Parking Assist is immediately canceled.
The Park Assist Canceled message
appears in the multifunction display.
Active Parking Assist is canceled
automatically if:
R the electric parking brake is engaged
R transmission position Pis selected
R parking using Active Parking Assist is no
longer possible
R you are driving faster than 6 mph
(10 km/h)
R a wheel spins, ESP ®
intervenes or fails. The
000F warning lamp lights up in the
instrument cluster.
Aw arning tone sounds. The parking symbol
disappears and the multifunction display
shows the Park Assist Canceled message.
If Active Parking Assist is canceled, you must
steer again yourself. Towing
atrailer For vehicles with a trailer tow hitch, the
minimum length for parking spaces is slightly
increased.
If you have attached a trailer to your vehicle,
you should not use Active Parking Assist.
Once the electrical connectio
nis established
between your vehicle and the trailer, Active
Parking Assist is no longer available.
PARKTRONIC is deactivated for the rear area. Rear view camera
General notes Rear view camera
0002is in the handle on the
tailgate.
Rear view camera 0002is an optical parking and
maneuvering aid. It shows the area behind
your vehicle with guide lines in the COMAND
display.
The area behind the vehicle is displayed as a
mirror image, as in the rear view mirror.
i The text of messages shown in the
COMAND display depends on the language
setting. The following are examples of rear
view camera messages in the COMAND
display.
Important safety notes The rear view camera is only an aid. It is not
a replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering and220
Driving systemsDriving and parking

0002
White guide line without turning the
steering wheel, vehicle width including
the exterior mirrors (static)
0003 Yellow guide line at a distance of
approximately 13 ft (4.0 m) from the rear
of the vehicle
0023 Red guide line for the vehicle width
including the exterior mirrors, for current
steering wheel angle (dynamic)
0022 Yellow lane marking tires at current
steering wheel angle (dynamic) 0020
Yellow guide line at a distance of
approximately 3 ft (1.0 m) from the rear
of the vehicle
0021 Vehicle center axle (marker assistance)
0014 Bumper
0015 Red guide line at a distance of
approximately 10 in (0.25 m) from the
rear of the vehicle
The guide lines are show nwhen the
transmission is in position R.
The distance specifications only apply to
objects that are at ground level. Additional messages for vehicles with
PARKTRONIC
0002
Front warning display
0003 Additional PARKTRONIC measurement
operational readiness indicator
0023 Rear warning display
Vehicles with PARKTRONIC: if
PARKTRONIC is operational (Y page 214), an
additional operational readiness indicator will
appearinC OMAND display 0003. If the
PARKTRONIC warning displays are active or
light up, warning displays 0002and 0023are also
active or light up correspondingly in the
COMAND display.
"Reverse parking" function Backing up straight into a parking space
without turning the steering wheel
0002
White guide line without turning the
steering wheel, vehicle width including
the exterior mirrors (static)
0003 Red guide line for the vehicle width
including the exterior mirrors, for current
steering wheel angle (dynamic) 222
Driving systemsDriving and parking

X
Use the COMAND controller to select
symbol 0020, see the separate operating
instructions for COMAND.
The "Coupling up a trailer" function is
selected. The distance specifications now
only apply to objects that are at the same
level as the ball coupling.
X Back up carefully, making sure that trailer
drawbarm arker assistant 0023points
approximately in the direction of trailer
drawbar 0022.
X Reverse carefully until trailer drawbar 0022
reaches red guide line 0003.
X Couple up the trailer (Y page 253).360° camera (surround view)
General notes The 360° camera is a system consisting of
four cameras.
The system analyzes images from the
following cameras:
R Rear view camera
R Front camera
R Two cameras in the exterior rear view
mirrors
The cameras capture the immediate
surroundings of the vehicle .The system
supports you, e.g. when parking or if vision is
restricted at an exit.
The 360° camera images can be shown in full
screen mode or in seven different split-screen
views on the COMAND display. Asplit-screen
view also includes a top view of the vehicle.
This view is calculated from the data supplied
by the installed cameras (virtual camera).
The seven split-screen views are:
R top view and picture from the rear view
camera (130 °viewing angle)
R top view and picture fro mthe front camera
(without displaying the maximum steering
wheel angle)
R top view and enlarged rear view R
top view and enlarged front view
R top view and trailer view (vehicles with
trailer tow hitch)
R top view and pictures from the rearward
facing mirror cameras (rear wheel view)
R top view and pictures from the forward
facing mirror cameras (front wheel view)
i The top view and trailer view are available
for vehicles equipped with a trailer tow
hitch.
When the function is active and you shift the
transmission from position Dor Rto N, you
see the previous view in the COMAND
display. The dynamic guidelines are hidden.
When you change between transmission
positions Dand R, you see the previously
selected front or rear view.
Important safety notes The 360° camera is only an aid. It is not a
replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering and
parking. When maneuvering or parking, make
sure that there are no persons, animals or
objects in the area in which you are
maneuvering.
The 360° camera may show a distorted view
of obstacles, show them incorrectly or not at
all. It cannot show objects in the following
areas:
R
under the front bumper
R very close to the front bumper
R very close to the rear bumper
R under the rear bumper
R in close range above the handle on the
trunk lid
R very close to the exterior mirrors
You are always responsible for safety, and
must always pay attention to your
surroundings when parking and
maneuvering. This applies to the areas
behind, in front of and beside the vehicle. You Driving systems
225Driving and parking Z

Warning and display messages in the
multifunction display
X
Activate ATTENTION ASSIST using the on-
board computer (Y page 273).
X If ATTENTION ASSIST is active, it will not
warn you until at least 20 minutes after
you rjourney has begun. You then hear an
intermittent warning tonet wice and the
Attention Assist: Take a Break! message appears in the multifunction
display.
If necessary, take a break.
X Press the 000Bor0007 button to confirm
the message.
On long journeys, take regular breaks in good
time to allow yourself to rest properly. If you
do not take a break and ATTENTION ASSIST
still detects increasing lapses in
concentration, you will be warned again after
15 minutes at the earliest.
ATTENTION ASSIST is reset when you
continue your journey and starts assessing
your tiredness again if:
R you switch off the engine.
R you take off your seat belt and open the
driver's door, e.g .for a change of drivers or
to take a break. Night View Assist Plus
General notes In addition to the illumination provided by the
normal headlamps, Night View Assist Plus uses infrared light to illuminate the road.
Night View Assist Plus camera
0002picks up
the infrared light and displays a monochrome
image in COMAND. The image displayed in
COMAND corresponds to a road lit up by high-
beam headlamps. This enables you to see the
road's course and any obstacles in good time.
If pedestrian recognition is activated,
pedestrians recognized by the system are
highlighted in the Night View Assist Plus
display.
Light from the headlamps of oncoming
vehicles does not affect the Night View Assist
Plus display in the multifunction display .This
is also the case if you cannot switch on the
high-beam headlamps due to oncoming
traffic.
i Infrared light is not visible to the human
eye and therefore does not glare. Night
View Assist Plus can therefore remain
switched on even if there is oncoming
traffic.
Important safety notes Night View Assist Plus is only an aid and is not
a substitute for attentive driving. Do not rely
on the Night View Assist Plus display. You are
responsible for the distance to the vehicle in
front, for vehicle speed and for braking in
good time. Drive carefully and always adapt
your driving style to suit the prevailing road
and traffic conditions.
The system may be impaired or may not
function if:
R
there is poor visibility, e.g. due to snow,
rain, fog or spray
R the windshield is dirty, fogged up or
covered, for instance by a sticker, in the
vicinity of the camera
R on bends, on uphill gradients or downhill
gradients 230
Driving systemsDriving and parking

Problems with Night View Assist Plus
Problem Possible causes/consequences and
0001 Solutions
The picture quality of
Night View Assist Plus
has deteriorated. The windshield wipers are smearing the windshield.
X
Replace the wiper blades (Y page 133). The windshield is smeared after the vehicle has been cleaned in a
car wash.
X
Cleant he windshield (Y page 373). There is windshield chip damage in the camera's field of vision.
X
Replace the windshield. The windshield is fogged up on the inside.
X
Defrost the windshield (Y page 150). The windshield is iced up.
X
De-ice the windshield (Y page 149). There is dirt on the inside of the windshield.
X
Cleant he inside of the windshield (Y page 373).Lane Tracking package
General notes The Lane Tracking package consists of Blind
Spot Assist (Y page 233) and Lane Keeping
Assist (Y page 235).
Blind Spot Assist General notes
Blind Spot Assist uses a radar sensor system
to monitor the areas on both sides of your
vehicle. It supports you from a speed of
approximately 20 mph (30 km/h). A warning
display in the exterio rmirrors draws your
attention to vehicles detected in the
monitored area. If you then switch on the
corresponding tur nsignal to change lanes,
you will also receive a visual and audible
collision warning. Blind Spot Assist uses
sensors in the rear bumper for monitoring
purposes. For Blind Spot Assist to assist you when
driving, the radar sensor system must be:
R
activated(Y page 276)
R operational
Important safety notes G
WARNING
Blind Spot Assist does not react to:
R vehicles overtaken too closely on the side,
placing the minthe blind spot area
R vehicles which approach with a large speed
differential and overtake your vehicle
As a result, Blind Spot Assist may not give
warnings in such situations. There is a risk of
an accident.
Always observe the traffic conditions
carefully, and maintain a safe lateral distance.
Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is no substitute for
attentive driving.
i USA only: Driving systems
233Driving and parking Z

This device has been approved by the FCC
as a "Vehicular RadarS
ystem". The radar
sensor is intended fo ruse in an automotive
radar system only. Removing, tampering
with, or altering the device will void any
warranties, and is not permitted by the
FCC. Do not tamper with, alter, or use in
any non-approved way.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
Monitoring range of the sensors
In particular, the detection of obstacles can
be impaired if:
R dirt on the sensors or anything else
covering the sensors
R poor visibility, e.g. due to fog, heavy rain,
snow or spray
R narrow vehicles, e.g. motorcycles or
bicycles
R the road has very wide lanes
R the road has narrow lanes
R you are not driving in the middle of the lane
R there are barriers or similarl ane borders
Vehicles in the monitorin grange are then not
indicated. Blind Spo
tAssist monitors the area up to
10 ft (3 m) behind your vehicle and directly
next to your vehicle, as shown in the diagram. If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may
be indicated, especially if the vehicles are not
driving in the middle of their lane. This may
be the case if there are vehicles driving at the
inner edge of their lanes.
Due to the nature of the system:
R
warnings may be issued in error when
driving close to crash barriers or similar
solid lane borders.
R the warning is canceled when driving for an
extended period next to long vehicles, such
as trucks.
The two radar sensors for Blind Spot Assist
are integrated into the sides of the rear
bumper. Make sure that the bumper is free of
dirt, ice or slush in the vicinity of the sensors.
The sensors must not be covered, for
example by cycle racks or overhanging loads.
Following a severe impact or in the event of
damage to the bumpers, have the condition
of the radar sensors checked at a qualified
specialist workshop. Blind Spot Assist may
otherwise not work properly.
Indicator and warning display
Blind Spot Assist is not active at speeds below
approximately 20 mph (30 km/h). Vehicles in
the monitoring range are then not indicated. 0002
Yellow indicator lamp/red warning lamp
When Blind Spot Assist is activated, indicator
lamp 0002in the exterior mirrors lights up
yellow at speeds of up to 20 mph (30k m/h).
At speeds above 20 mph (30 km/h), the 234
Driving systemsDriving and parking

indicator lamp goes out and Blind Spot Assist
is operational.
If a vehicle is detected within the blind spot
monitoring range at speeds above 20 mph
(30 km/h), warning lamp 0002on the
corresponding side lights up red. This warning
is always emitted when a vehicle enters the
blind spot monitoring rang efrom behind or
from the side .When you overtake a vehicle,
the warning only occurs if the difference in
speed is less than 7mph (12 km/h).
The yellow indicator lamp goes out if reverse
gear is engaged. In this event, Blind Spot
Assist is no longer active.
The brightness of the indicator/warning
lamps is adjusted automatically according to
the ambient light.
Collision warning
If a vehicle is detected in the monitoring range
of Blind Spot Assist and you switch on the
corresponding turn signal, a double warning
tone sounds. Red warning lamp 0002flashes. If
the turn signal remains on, vehicles detected
are indicated by the flashing of red warning
lamp 0002.There are no further warning tones.
Switching on Blind Spot Assist X
Make sure that the radar sensor system
(Y page 276) and Blind Spot Assist (Y
page 273) are activated in the on-board
computer.
X Turn the SmartKey to position 2in the
ignition lock.
Warning lamps 0002in the exterior mirrors
light up red for approximately
1.5 seconds and then turn yellow.
Towing atrailer
When you attach a trailer, make sure you have
correctly established the electrical
connection. This can be accomplished by
checking the trailer lighting. In this event,
Blind Spo tAssist is deactivated. The indicator
lamp in the exterior mirrors lights up yellow,
and the Blind Spot Assist Currently Unavailable See Operator's Manual
message appears in the multifunction
display.
i
You can deactivate the indicator lamps in
the exterior mirrors.
To do so, switch off Blind Spot Assist when:
R the SmartKey is in position 2in the
ignition lock
R the engine is not running
R the electrical connection to the trailer
has been established
Lane Keeping Assist General notes
0002
Lane Keeping Assist camera
Lane Keeping Assist monitors the area in
front of your vehicle by means of a Driving systems
235Driving and parking Z