
Problems with Parking Assist PARKTRONIC
Problem
Possible causes/consequences and
M
MSolutions Only the red segments in
the Parking Assist
PARKTRONIC warning
displays are lit. You also
hear a warning tone for
approximately two sec-
onds.
Parking Assist
PARKTRONIC is then
deactivated and the indi-
cator lamp on the
PARKTRONIC button
lights up. Parking Assist PARKTRONIC is malfunctioning and has been deacti-
vated.
X If problems persist, have Parking Assist PARKTRONIC checked at a
qualified specialist workshop. Only the red segments in
the Parking Assist
PARKTRONIC warning
displays are lit. Parking
Assist PARKTRONIC is
then deactivated. The Parking Assist PARKTRONIC sensors are dirty or malfunctioning.
X Clean the Parking Assist PARKTRONIC sensors (Y page 289).
X Switch the ignition back on. The problem may be caused by an external source of radio or ultra-
sound waves.
X Check to see if Parking Assist PARKTRONIC functions in a different
location. Parking Pilot
General notes Parking Pilot is an electronic parking aid with
ultrasound. It measures the road on both sides
of the vehicle. A parking symbol indicates a suit-
able parking space. Active steering intervention
and brake application can assist you during
parking and when exiting a parking space. Park- ing Assist PARKTRONIC is also available
(Y page 177).
i The active braking application is only avail-
able on vehicles with automatic transmission.
Important safety notes Parking Pilot is only an aid. It is not a substitute
for your attention to the immediate surround-
ings. The responsibility for safe manoeuvring
and parking remains with you. Make sure that no
persons, animals or objects are in the manoeu-
vring range.
When Parking Assist PARKTRONIC is deactiva-
ted, Parking Pilot 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
cause you to collide with other road users.
There is a risk of an accident.
Pay attention to other road users. Stop the
vehicle if necessary or cancel the Parking Pilot parking procedure.
! If unavoidable, you should drive over obsta-
cles such as kerbs slowly and not at a sharp
angle. Otherwise, you may damage the
wheels or tyres.
Parking Pilot may also display spaces not suita- ble for parking, e.g.:
R in a zone where parking or stopping is pro-
hibited
R in front of driveways or entrances and exits
R on unsuitable surfaces 180
Driving systemsDriving and parking

Parking Pilot will detect only parking spaces
which are:
R parallel or at right angles to the direction of
travel
R that are parallel to the direction of travel and
are at least 1.5 m wide
R that are parallel to the direction of travel and
at least 1.0 m longer than your vehicle
R that are at right angles to the direction of
travel and at least 1.0 mwider than your vehi-
cle
i Note that Parking Pilot cannot measure the
length of a parking space if it is at right angles to the direction of travel. You will need to
judge whether your vehicle will fit in the park-
ing space.
When driving at speeds below 30 km/h, you will
see parking symbol ;as a status indicator in
the instrument cluster. When a parking space
has been detected, an arrow towards the right or the left also appears. Parking Pilot displays only
parking spaces on the front-passenger side as
standard. Parking spaces on the driver's side
are displayed as soon as the turn signal on the
driver's side is activated. When parking on the
driver's side, this must remain activated until
you confirm the use of Parking Pilot by pressing the a button on the multifunction steering
wheel. The system automatically determines
whether the parking space is parallel or at right
angles to the direction of travel.
A parking space is displayed while you are driv- ing past it, and until you are approximately 15 m
away from it.
Parking G
WARNING
If you leave the vehicle when it is only being
braked by Parking Pilot, it could roll away if:
R there is a malfunction in the system or in
the voltage supply.
R the electrical system in the engine com-
partment, the battery or the fuses are tam-
pered with.
R the battery is disconnected
R the vehicle is accelerated, e.g. by a vehicle
occupant.
There is a risk of an accident. Before leaving the vehicle, always secure it
against rolling away.
i Vehicles with automatic transmission:
If Parking Assist PARKTRONIC detects obsta-
cles, Parking Pilot brakes automatically whilst
the vehicle is parking. You are responsible for
braking in good time.
X Stop the vehicle when the parking symbol
shows the desired parking space in the instru-
ment cluster.
X Vehicles with automatic transmission:
shift the transmission to position
R.
Vehicles with manual transmission: shift
to reverse gear.
The Start Parking Pilot?
Start Parking Pilot? Yes: OK Yes: OKNo:
No:
% message appears in the multifunction
display.
X To cancel the procedure: press the%
button on the multifunction steering wheel or
pull away.
or X To park using Parking Pilot: press thea
button on the multifunction steering wheel.
The Parking Pilot active Accelerate Parking Pilot active Accelerate
and brake
and brake Observe surroundings
Observe surroundings mes-
sage appears in the multifunction display.
X Release the multifunction steering wheel.
X Reverse the vehicle, being ready to brake at
all times. When reversing, drive at a speed
below 10 km/h. Otherwise Parking Pilot is
cancelled.
Vehicles with automatic transmission:
Parking Pilot brakes the vehicle to a standstill
when the vehicle approaches the rear border
of the parking space.
Manoeuvring may be required in tight parking spaces.
X Vehicles with manual transmission: stop
when Parking Assist PARKTRONIC sounds the continuous warning tone, if not before.
Manoeuvring may be required in tight parking
spaces.
Vehicles with automatic transmission: the
Parking Pilot active Select D Parking Pilot active Select D Observe
Observe
surroundings
surroundings message appears in the multi-
function display.
Vehicles with manual transmission: the
Parking Pilot active Engage forward Parking Pilot active Engage forward
gear gear Observe surroundings
Observe surroundings message
appears in the multifunction display. 182
Driving systemsDriving and parking

X
Vehicles with automatic transmission:
select transmission position
Dwhile the vehi-
cle is stationary.
Vehicles with manual transmission: shift
to first gear while the vehicle is stationary.
Parking Pilot immediately steers in the other
direction.
The Parking Pilot active Accelerate Parking Pilot active Accelerate
and brake
and brake Observe surroundings
Observe surroundings mes-
sage appears in the multifunction display.
i You will achieve the best results by waiting
for the steering procedure to complete before
pulling away.
X Drive forwards and be ready to brake at all
times.
Vehicles with automatic transmission:
Parking Pilot brakes the vehicle to a standstill
when the vehicle approaches the front border
of the parking space.
Manoeuvring may be required in tight parking spaces.
X Vehicles with manual transmission: stop
when Parking Assist PARKTRONIC sounds the continuous warning tone, if not before.
Vehicles with automatic transmission: the
Parking Pilot active Select R
Parking Pilot active Select R Observe Observe
surroundings
surroundings message appears in the multi-
function display.
Vehicles with manual transmission: the
Parking Pilot active Engage reverse Parking Pilot active Engage reverse
gearObserve surroundings gearObserve surroundings message
appears in the multifunction display.
As soon as the parking procedure is complete,
the Parking Parking Pilot
Pilotended
endedmessage appears in
the multifunction display and a warning tone
sounds. The vehicle is now parked.
Vehicles with automatic transmission: the
vehicle is kept stationary without the driver hav-
ing to depress the brake pedal. The braking
effect is cancelled when you depress the accel- erator pedal.
Parking Pilot no longer supports you with steer-
ing interventions and brake applications. When
Parking Pilot is ended, you must steer and brake again yourself. Parking Assist PARKTRONIC is
still available.
Parking tips:
R The way your vehicle is positioned in the park-
ing space after parking is dependent on vari-
ous factors. These include the position and
shape of the vehicles parked in front of and behind it and the conditions of the location. It
may be the case that Parking Pilot guides you
too far into a parking space, or not far enough
into it. In some cases, it may also lead you
across or onto the kerb. If necessary, you
should abort the parking procedure with Park-
ing Pilot.
R You can also preselect transmission position
D. The vehicle redirects and does not drive as
far into the parking space. Should the trans-
mission change take place too early, the park-
ing procedure will be cancelled. A sensible
parking position can no longer be achieved
from this position.
Exiting a parking space In order that Parking Pilot can support you when
exiting the parking space:
R you need to have parked using Parking Pilot
R the border of the parking space must be high
enough at the front and the rear. A kerb stoneis too small, for example.
R the border of the parking space must not be
too wide, as the position of the vehicle must
not exceed an angle of 45° to the starting
position as it is manoeuvred into the parking
space.
R a manoeuvring distance of at least 1.0 mmust
be available.
Parking Pilot can assist you with exiting a park-
ing space only if you have parked the vehicle
parallel to the direction of travel using the Park-
ing Pilot
i Vehicles with automatic transmission:
If Parking Assist PARKTRONIC detects obsta-
cles, Parking Pilot brakes automatically whilst the vehicle is exiting the parking space. You
are responsible for braking in good time.
X Start the engine.
X Release the electric parking brake.
X Switch on the turn signal in the direction you
will drive out of the parking space.
X Vehicles with automatic transmission:
shift the transmission to position
Dor R.
Vehicles with manual transmission: shift
to forward or reverse gear.
The Start Parking Pilot?
Start Parking Pilot? Yes: OK Yes: OKNo:
No:
% message appears in the multifunction
display. Driving systems
183Driving and parking Z

X
To cancel the procedure:press the %
button on the multifunction steering wheel or pull away.
or
X To exit a parking space using Parking
Pilot:
press the abutton on the multi-
function steering wheel.
The Parking Pilot active Accelerate
Parking Pilot active Accelerate
and brake
and brake Observe surroundings Observe surroundings mes-
sage appears in the multifunction display.
X Release the multifunction steering wheel.
X Pull away, being ready to brake at all times. Do
not exceed a maximum speed of approx-
imately 10 km/h when exiting a parking
space. Otherwise, Parking Pilot is cancelled.
X Vehicles with manual transmission: stop,
when Parking Assist PARKTRONIC sounds the continuous warning tone, if not before.
X Vehicles with automatic transmission:
depending on the message or as required,
shift the transmission to position
Dor R.
Vehicles with manual transmission:
depending on the message or as required,
engage forward or reverse gear.
Parking Pilot steers immediately in the other
direction. The Parking Pilot active
Parking Pilot active
Accelerate and brake
Accelerate and brake Observe sur‐ Observe sur‐
roundings
roundings message appears in the multi-
function display.
i You will achieve the best results by waiting
for the steering procedure to complete before
pulling away.
If you reverse after activation, the steering
wheel is moved to the straight-ahead posi-
tion.
X Drive forwards and reverse as prompted by
the Parking Assist PARKTRONIC warning dis-
plays, several times if necessary.
Once you have exited the parking space com-
pletely, the steering wheel is moved to the
straight-ahead position. You hear a tone and the
Parking
Parking Pilot Pilotended
endedmessage appears in the
multifunction display. You will then have to steer
and merge into traffic on your own. Parking
Assist 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 recognise that it
is already possible to pull out of the parking
space. Cancelling Parking Pilot X
Stop the movement of the multifunction
steering wheel or steer yourself.
Parking Pilot is cancelled at once. The Park‐ Park‐
ing Pilot cancelled ing Pilot cancelled message appears in
the multifunction display.
or X Press the PARKTRONIC button (Y page 179).
Parking Assist PARKTRONIC is switched off
and Parking Pilot is immediately cancelled.
The Parking Pilot cancelled
Parking Pilot cancelled message
appears in the multifunction display.
Parking Pilot is cancelled automatically when:
R the electric parking brake is applied
R transmission position Pis selected in vehicles
with automatic transmission
R parking with Parking Pilot is no longer possi-
ble
R you are driving faster than 10 km/h
R a wheel spins and ESP ®
intervenes or fails. In
such cases the ÷warning lamp lights up in
the instrument cluster.
A warning tone sounds. The parking symbol dis-
appears and the multifunction display shows the
Parking Pilot cancelled Parking Pilot cancelled message.
When Parking Pilot is cancelled, you must steer
and brake again yourself.
If a system malfunction occurs, the vehicle is
braked to a standstill. To drive on, depress the
accelerator pedal again. Reversing camera
General notes Reversing camera
:is an optical parking and
manoeuvring aid. It shows the area behind your 184
Driving systemsDriving an
d parking

vehicle with guide lines in the multimedia sys-
tem display.
The area behind the vehicle is displayed as a
mirror image, as in the rear-view mirror.
i The text shown in the multimedia system
display depends on the language setting. The following are examples of reversing camera
messages in the multimedia system display.
See the notes on cleaning (Y page 289).
Important safety notes The reversing camera is only an aid. It is not a
substitute for your attention to the immediate
surroundings. The responsibility for safe
manoeuvring and parking remains with you.
Make sure that there are no persons, animals or
objects in range while manoeuvring and parking.
The reversing camera will not function or will
function only in a limited manner:
R If the boot lid is open
R In heavy rain, snow or fog
R At night or in very dark places
R If the camera is exposed to very bright light
R If the area is lit by fluorescent lamps or LED
lighting (the display may flicker)
R If there is a sudden change in temperature,
e.g. when driving into a heated garage in win- ter
R If the camera lens is dirty or obstructed.
Observe the notes on cleaning
(Y page 289)
R If the rear of your vehicle is damaged. In this
case, have the camera position and setting
checked at a qualified specialist workshop
The field of vision and other functions of the
reversing camera may be restricted due to addi-
tional accessories on the rear of the vehicle (e.g. licence plate holder, bicycle rack). Activating/deactivating the reversing
camera X
To activate: make sure that the key is in
position 2in the ignition lock.
X Make sure that the Activation by R gear Activation by R gear
function is selected in the multimedia system; see the Digital Owner's Manual.
X Engage reverse gear.
The area behind the vehicle is shown with
guide lines in the multimedia system display.
The image from the reversing camera is avail-
able throughout the manoeuvring process.
X To switch the function mode for vehicles
with trailer tow hitch: using the controller,
select symbol :for the "Reverse parking"
function or symbol ;for "Coupling up a
trailer".
The symbol of the selected function is high-
lighted.
To deactivate: the reversing camera deacti-
vates if you shift the transmission to Por after
driving forwards a short distance.
Messages in the multimedia system dis-
play The reversing camera may show a distorted view
of obstacles, show them incorrectly or not at all.
Obstacles are not shown by the reversing cam-
era in the following locations:
R Very close to the rear bumper
R Under the rear bumper
R In the area immediately above the recessed
handle on the boot lid
! Objects not at ground level may appear to
be further away than they actually are, e.g.:
R the bumper of a parked vehicle
R the drawbar of a trailer Driving systems
185Driving and parking Z

R
the ball coupling of a trailer tow hitch
R the rear section of an HGV
R a slanted post
Use the guidelines only for orientation.
Approach objects no further than the bottom- most guideline. :
Yellow guide line at a distance of approx-
imately 4.0 m fromthe rear of the vehicle
; White guide line without turning the steering
wheel, vehicle width including the exterior
mirrors (static)
= Yellow guide line for the vehicle width
including the exterior mirrors, for current
steering wheel angle (dynamic)
? Yellow lane marking the course the tyres will
take at the current steering wheel angle
(dynamic) A
Yellow guide line at a distance of approx-
imately 1.0 m fromthe rear of the vehicle
B Vehicle centre axis (locating aid)
C Bumper
D Red guide line at a distance of approximately
0.30 m from the rear of the vehicle :
Front warning displays
; Additional measurement operational readi-
ness indicator of the Parking Assist
PARKTRONIC
= Rear warning displays
When Parking Assist PARKTRONIC is opera-
tional (Y page 178), additional measurement
operational readiness indicator ;appears in
the multimedia system display. If the Parking
Assist PARKTRONIC warning displays are active
or light up, warning displays :and =are also
active or light up correspondingly in the multi-
media system display.
"Reverse parking" function Reversing straight into a parking space
without turning the steering wheel :
White guide line without turning the steering
wheel, vehicle width including the exterior
mirrors (static)
; Yellow guide line for the vehicle width
including the exterior mirrors, for current
steering wheel angle (dynamic)
= Yellow guide line at a distance of approx-
imately 1.0 m fromthe rear of the vehicle
? Red guide line at a distance of approximately
0.30 m from the rear of the vehicle 186
Driving systemsDriving an
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corresponds to the last selection activated
(standard/sensitive).
Warning on the multifunction display If fatigue or increasing lapses in concentration
are detected, a warning appears in the multi-
function display: ATTENTION ASSIST
ATTENTION ASSIST Take a
Take a
break!
break!
In addition to the message shown on the multi-
function display, you will then hear a warning
tone.
X If necessary, take a break.
X Confirm the message by pressing the a
button on the steering wheel.
On long journeys, take regular breaks that allow
for adequate recuperation. 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.
This will happen only if ATTENTION ASSIST still
detects typical indicators of fatigue or increas-
ing lapses in concentration.
Vehicles with multimedia system COMAND
Online: if a warning is output in the multifunc-
tion display, a service station search is per-
formed in the multimedia system. You can
select a service station and you will then be
navigated to this service station. This function
can be activated and deactivated in the multi-
media system; see Digital Owner's Manual. Traffic Sign Assist
General notes Traffic Sign Assist displays the maximum speed
permitted and overtaking restrictions to the
driver in the instrument cluster. Driving onto a
section of road in the wrong direction triggers a warning. Traffic Sign Assist detects traffic signs
with multifunction camera :attached at the
top of the windscreen. The data and general
traffic regulations stored in the navigation sys-
tem are also used to determine the current
speed limit.
If a traffic sign that is relevant to your vehicle is
passed, the display of the speed limits and over- taking restrictions is updated.
The display can also be updated without a visible
traffic sign in the following situations:
R The vehicle changes roads (e.g. motorway
exit or slip road)
R A village or town boundary that is stored in the
digital map is passed
R The last traffic sign detected by the camera
has not been repeated
If a sign indicating the end of a restriction (speed limit or overtaking restriction) is passed, the
sign is displayed for five seconds. The currently
applicable traffic regulation continues to be
shown in the assistance graphic display
(Y page 208).
The camera also detects traffic signs with a
restriction indicated by an additional sign (e.g. in
wet conditions).
The traffic signs are only displayed with the
restriction if:
R The regulation must be observed with the
restriction, or
R Traffic Sign Assist is unable to determine
whether the restriction applies
If Traffic Sign Assist is unable to determine a
maximum permitted speed from any of the avail- able sources, no speed limit is displayed in the
instrument cluster either. Traffic Sign Assist is not available in all coun-
tries. In this case, display
:is shown in the
multifunction display. 190
Driving systemsDriving and parking

Blind Spot Assist
General notes
Blind Spot Assist monitors the areas on either
side of the vehicle that are not visible to the
driver with two lateral, rear-facing radar sen-
sors. A warning display in the exterior mirrors
draws your attention to vehicles detected in the
monitored area. If you then switch on the cor-
responding turn signal to change lanes, you will also receive a visual and audible warning.
Blind Spot Assist supports you from a speed of
approximately 30 km/h.
Important safety notes G
WARNING
Blind Spot Assist does not react to vehicles:
R overtaken too closely on the side, placing
them in the blind spot area
R when the difference in the speed of
approach and overtaking is too great
As a result, Blind Spot Assist cannot warn
drivers in these situations. There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and maintain a safe distance at the side
of the vehicle.
Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is not a substitute for
attentive driving. Always ensure that there is
sufficient distance to the side for other road
users and obstacles.
Radar sensors The radar sensors for Blind Spot Assist are inte-
grated into the rear bumper. Make sure that the
bumpers are free from dirt, ice or slush. The
sensors must not be covered, e.g. by cycle racks
or overhanging loads. Following a severe impact or in the event of damage to the bumpers, havethe function of the radar sensors checked at a
qualified specialist workshop. Blind Spot Assist
may no longer work properly in such cases. Monitoring range of the sensors
In particular, the detection of obstacles can be
impaired in the following situations:
R dirt on the sensors or obscured sensors
R poor visibility, e.g. due to fog, heavy rain or
snow
R a narrow vehicle travelling in front, e.g. a
motorcycle or a bicycle
R very wide lanes
R narrow lanes
R vehicles not driving in the middle of their lane
R barriers or other road boundaries
Vehicles in the monitoring range are then not
indicated.
Blind Spot Assist monitors an area up to 3.0 m
behind your vehicle and directly next to your
vehicle.
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 driv-
ing in the middle of their lane. This may be the
case if the vehicles are driving on the inner side of their lane.
Due to the nature of the system:
R warnings may be issued in error when driving
close to crash barriers or similar solid boun-
daries
R warnings may be interrupted when you are
driving alongside particularly long vehicles,
for example lorries, for a prolonged time
Warning display :
Warning display
Blind Spot Assist is not active at speeds below
approximately 30 km/h. Vehicles in the moni-
toring range are then not indicated.
If Blind Spot Assist is activated, indicator
lamp :in the exterior mirrors lights up yellow 192
Driving systemsDriving an
d parking