Troubleshooting
Warning and indicator lamps on the instrument cluster display
Fault in electronic parking brake. Go to a qualified workshop.
Electronic parking brake does not switch off
The electronic parking brake will not switch itself off if the prerequisites for switching off are not met
or the 12-volt vehicle battery is discharged. Use jump leads ⇒ Jump starting.
Noises of the electronic parking brake
•Noises may be heard when the electronic parking brake is switched on or off.
•If the electronic parking brake has not been used for a long period, the system will carry out
occasional automatic and acoustic checks when the vehicle is parked.
Auto Hold function
Fig. 152 In the centre console: button for the Auto Hold function.
Description of the Auto Hold function
The Auto Hold function can hold the vehicle stationary. The vehicle does not have to be held on the
foot brake.
Old: The Auto Hold function is active when the indicator lamp in the button
⇒ Fig. 152 (arrow) lights up yellow and the indicator lamp in the instrument cluster display
lights up green.
New: The activated Auto Hold function holds the vehicle stationary when the indicator lamp
lights up green on the instrument cluster display.
The Auto Hold function stops holding the vehicle when it starts to move away.
If any of the conditions for the Auto Hold function change while the vehicle is stationary, the Auto
Hold function will switch off automatically. The green indicator lamp in the instrument cluster
display then goes out together with the yellow indicator lamp in the button.
Switching on the Auto Hold function
The Auto Hold function can be switched on when the driver door is closed and the engine has been
started.
•Press the button ⇒. The indicator lamp ⇒ Fig. 152
in the button (arrow) lights up yellow. The Auto Hold function is operational, but the vehicle is
not necessarily held stationary ⇒.
The incorrect use of the electronic parking brake can cause accidents and serious
injuries.
•Never use the electronic parking brake to brake the vehicle, except in emergencies.
The braking distance is considerably longer as only the rear wheels are braked. Always
use the foot brake.
•Never activate the accelerator from the engine compartment if a position or gear has
been selected and the engine is running. The vehicle could move, even if the electronic
parking brake is applied.
WARNING
Exiting the vehicle incorrectly can cause the vehicle to roll away. This can cause
accidents, serious injuries and damage to property.
•Always park the vehicle in the specified order ⇒ Parking.
•Before leaving the vehicle, make sure that the electronic parking brake is switched on
and that the indicator light lights up red on the instrument cluster display when
the ignition is switched off.
WARNING
DSG: if the gear selector lever is moved to position N, the Auto Hold function will not be switched
on or will be switched off. As a result, the vehicle will not be held securely in a stationary position ⇒
.
Holding the vehicle stationary with the Auto Hold function
•Make sure that the Auto Hold function is operational. The indicator lamp in the
button lights up yellow.
•Brake the vehicle to bring it to a standstill ⇒ Parking.
•Manual gearbox: disengage the clutch and either keep the clutch fully depressed or shift to
neutral.
•Release the brake. The indicator lamp will light up greenon the instrument cluster display.
The vehicle is being held stationary by the Auto Hold function ⇒.
Switching off the Auto Hold function
•Press the button ⇒. The indicator lamp in the button
⇒ Fig. 152 (arrow) switches off.
The electronic parking brake switches on automatically to hold the vehicle securely. However, the
electronic parking brake will not switch on if the brake pedal is depressed when the Auto Hold
function is switched off ⇒.
Switching off the Auto Hold function temporarily using the button
It can sometimes be necessary to turn the Auto Hold function off temporarily to enable the vehicle
to roll more easily, for example when manoeuvring.
•With the engine switched on, depress the brake pedal.
•Press the button. The Auto Hold function is deactivated.
The Auto Hold function will be reactivated as soon as the brake pedal is depressed again when the
vehicle has come to a standstill.
The system's limits
If the clutch grinds while the ignition is switched off or the driver door is open, the vehicle cannot be
secured against rolling away with the Auto Hold function or the electronic parking brake in certain
circumstances ⇒. After switching off the ignition or opening the driver door, make sure
that the indicator lampin the instrument cluster display lights up red. The electronic
parking brake is switched on.
Safety notes on the parking systems
The parking systems include the following:
•Park Distance Control ⇒ Park Distance Control.
•Rear view camera system (Rear View) ⇒ Rear view camera system (Rear View).
•Park Assist ⇒ Park Assist.
•Area View ⇒ Area View.
•Trailer manoeuvring system (Trailer Assist) ⇒ Trailer Assist
The systems available depend on the equipment in the vehicle.
Always observe and follow the general safety notes when using the parking systems.
®
The intelligent Auto Hold function cannot overcome the laws of physics, and operates
only within the limits of the system. Never let the extra convenience afforded by the Auto
Hold function tempt you into taking any risks when driving.
•Make sure that the indicator lamp in the instrument cluster display lights up green
or red if you want to hold the vehicle securely. The vehicle is being held by the
Auto Hold function if the green indicator lamp is lit and by the electronic parking brake
if the red warning lamp is lit.
•Never leave the vehicle if the engine is running and the Auto Hold function is switched
on.
•The Auto Hold function cannot hold the vehicle in all hill start situations or brake it
sufficiently on all slopes going downhill, e.g. if the ground is slippery or icy.
WARNING
Switch off the Auto Hold function before driving into a car wash. Damage may otherwise
be caused by automatic activation of the electronic parking brake.
NOTICE
Park Distance Control switches itself on automatically if the vehicle rolls backwards.
Depending on the vehicle equipment, Park Distance Control can also be activated automatically.
Switching off Park Distance Control
•Press the or button.
•OR: drive forwards at a speed of more than 10-15 km/h (6-9 mph).
•OR: move the selector lever to position P.
Automatic activation (depending on equipment)
Park Distance Control also switches itself on if the vehicle approaches an obstacle in the front area
of the vehicle at a speed of less than 15 km/h (9 mph). Automatic activation can be switched on in
the Infotainment system.
Automatic activation functions only when the vehicle speed falls below around 15 km/h (9 mph) for
the first time. Renewed automatic activation is possible after Park Distance Control has been
switched off and then back on again with the button or .
Automatic activation can also be reactivated by switching the ignition or electronic parking brake off
and then back on again.
Manoeuvre braking
If the vehicle is equipped with manoeuvre braking, the manoeuvre braking function triggers the
emergency brake as soon as an obstacle is detected while reversing. The manoeuvre braking
function helps to prevent collisions. The vehicle speed must not be higher than 10 km/h (6 mph).
The manoeuvre braking function is activated or deactivated when Park Distance Control is switched
on or off. The manoeuvre braking function is inactive for five metres after a braking operation in the
same direction of travel. The manoeuvre braking function is ready for braking again after changing
gear or position. The same restrictions apply as for Park Distance Control.
Manoeuvre braking is not active if Park Distance Control was activated automatically.
Touch the function button to switch manoeuvre braking on and off.
Display representation
Fig. 154 Display in the Infotainment system: full-screen mode. The scanned areas depend on the
vehicle equipment level.
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The scanned areas are represented by several segments in the Infotainment system ⇒ Fig. 154.
The closer the vehicle drives towards an obstacle, the closer the segment will move to the vehicle
in the display. Signal tones sound at the same time.
Obstacle close to the vehicle. A continuous tone sounds. Do not drive on!Obstacle in the
vehicle path. An intermittent tone sounds. The shorter the distance, the shorter the intervals.
Obstacle outside the vehicle path.Mute signal tones.Switch manoeuvre braking
on and off (depending on vehicle equipment).Switch to rear view camera system (depending
on vehicle equipment). / System fault in the monitored area (depending on equipment level).
Only the scanned area to the front of the vehicle is shown on the Infotainment system display in
vehicles with a factory-fitted towing bracket and a trailer with an electrical connection to the vehicle
⇒ Trailer towing.
Things to note in the area around the vehicle (depending on vehicle
equipment)
The scanned area along the side of the vehicle is automatically hidden in the following situations:
•When a vehicle door is opened.
•TCS is switched off or is taking corrective action.
•If the vehicle is stationary for longer than approximately three minutes.
The vehicle must be moved a few metres forwards or backwards in order to be able to show the
entire area around the vehicle. The missing areas are then scanned and the area around the
vehicle is calculated.
•Changes have been made to the paintwork around the camera or the construction has been
modified, e.g. vehicle front end or the running gear.
Response to all circumstances
•Switch off the system temporarily.
•Check whether any of the causes described below apply.
•You can switch the system back on again once you have rectified the cause of the problem.
•If the system still fails to respond as expected, have the system checked by a qualified
workshop.
Park Assist
Introduction
This chapter contains information on the followingsubjects:
⇒ Prerequisites
⇒ Looking for a parking space
⇒ Driving into a parking space
⇒ Driving out of a parking space
⇒ Troubleshooting
Park Assist shows parking spaces
which are suitable for parking and
assists the driver when driving into and
out of parking spaces.
Park Assist is an extension of Park Distance Control ⇒ Park Distance Control.
Park Assist automatically steers the vehicle. The driver must control the accelerator, gear changes
and brake!
Driving into a parking space using Park Assist takes place in the following steps:
•Look for a parking space.
•Drive into a parking space.
System limits
The sensors may not always be able to detect objects such as trailer drawbars, thin rails, fences,
posts, trees and open or opening boot lids. This can result in damage to your vehicle.
In some cases, dirt and ice on the sensors could be registered as an obstacle.
Prerequisites
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The following prerequisites must be met for driving into and out of parking spaces:
•The traction control system (TCS) must be switched on ⇒ Brake support systems.
•Distance: maintain a distance of 0.5 – -2.0 metres when driving past the parking space.
•The parking space must have at least the dimensions required by Park Assist.
•Speed when driving past the parking space (for parking spaces parallel to the road): not above
40 km/h (25 mph).
•Speed when driving past the parking space (for parking spaces perpendicular to the road): not
above 20 km/h (12 mph).
•Maximum speed: 7 km/h (4 mph). An automatic braking intervention can take place when
driving into a parking space.
The parking manoeuvre can be continued after the automatic brake intervention.
Fast steering wheel movements can cause serious injury.
•During the manoeuvring operation, do not reach for the steering wheel until prompted
to do so by the system.
•Exception: if a dangerous situation occurs, intervene and take over the steering.
WARNING
Park Assist uses parked vehicles, the kerb and other objects as guidance. Please ensure
that the wheels and tyres are not damaged when parking the vehicle. If necessary, stop the
parking procedure in good time to prevent damage to the vehicle.
NOTICE
The automatic braking intervention takes place a maximum of once per parking manoeuvre. The
parking manoeuvre will be cancelled if a speed of approximately 7 km/h (4 mph) is exceeded again.
Automatic cancellation of driving in/out of a parking space
Park Assist cancels the manoeuvre for driving into or leaving a parking space if one of the following
situations occurs:
•The button is pressed.
•The driver intervenes using the steering wheel.
•The driver door is opened.
•The parking operation is not completed within around six minutes.
•There is a system fault.
•TCS is switched off or is taking corrective action.
Automatic braking intervention to minimise damage
In some countries, Park Assist can assist the driver with an automatic braking intervention in certain
situations ⇒.
Depending on the vehicle equipment and certain conditions, e.g. weather, load or inclination of the
vehicle, Park Assist can automatically brake the vehicle before an obstacle. Following this
intervention, the driver must depress the brake pedal. An automatic braking intervention is activated
to minimise damage and ends the parking manoeuvre.
Looking for a parking space
Fig. 157 Instrument cluster display: display of parking modes.
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Park Assist has three parking modes ⇒ Fig. 157 (illustration).
Reverse parallel parking.Reverse perpendicular parking.Forward perpendicular parking.
•Drive slowly past a row of parked vehicles, paying attention to the traffic.
•Press the button. Park Assist automatically searches for a suitable parking space on
the front passenger side.
•Stop when Park Assist displays a recommended parking mode on the instrument cluster
display.
•Drive into the parking space when a corresponding prompt ⇒ Fig. 158⑤ is shown on the
instrument cluster display ⇒ Driving into a parking space.
If you want Park Assist to search for a parking space on the opposite side of the road, operate the
turn signal for the corresponding side.
Changing parking mode
If Park Assist has found other alternative parking modes, these will be displayed in a miniature
view. You can select these successively by pressing the button. Park Assist will switch
itself off after selection of all found parking modes. The originally recommended parking mode is
offered when the button is pressed again.
Forward perpendicular parking
If you wish to drive forwards into a perpendicular parking space, select the parking mode Forward
perpendicular parking ⇒ Fig. 157 by pressing the button (if found by Park Assist).
Do not let the Park Assist braking intervention function tempt you to take any risks while
driving – this can cause accidents. The system is not a substitute for the full
concentration of the driver.
•Park Assist has system-related limitations. In some situations, the automatic braking
intervention function is only able to intervene in a limited way or not at all.
•You should always be prepared to brake the vehicle yourself.
•The automatic braking intervention is ended after approximately 1.5 seconds. Depress
the brake pedal of the vehicle yourself following the automatic braking intervention.
WARNING
Park Assist can be activated retroactively. If a suitable parking space was driven past before,
it is displayed.
Driving into a parking space
Fig. 158 On the instrument cluster display: parking perpendicular to the road. Looking for a parking
space, positioning the vehicle for parking and manoeuvring.
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Key to ⇒ Fig. 158 (reverse perpendicular parking mode):
Prompt to drive forward
Your vehicle
Parked vehicle or obstacle.
Parking space detected
Prompt to select reverse gear.
Prompt to press the brake pedal.
Progress bar Symbolically shows the relative distance still to be driven.
The prerequisites for parking space selection must be met ⇒ Prerequisites and the vehicle must be
stationary.
•Release the steering wheel ⇒.
•Select reverse gear when a reverse arrow appears on the instrument cluster display.
•Carefully press the accelerator.
•Brake when an acoustic signal prompting you to change direction sounds, an arrow
⇒ Fig. 158① lights up, the white symbol lights up or a message is displayed.
•Drive forwards until an acoustic signal sounds or until the prompt to reverse is shown on the
instrument cluster display.
•Repeat reversing and driving forwards until a corresponding message is displayed on the
instrument cluster. A signal tone may also sound.
Driving out of a parking space
Fig. 159 On the instrument cluster display: driving out of a parallel parking space.
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Key to ⇒ Fig. 159:
Stationary vehicle.
Your vehicle with reverse gear engaged
Progress bar. Symbolically shows the relative distance still to be driven.
Direction indicator for next manoeuvre for driving out of the parking space.
Park Assist can drive out of parallel parking spaces.
Requirements for driving out of a parking space while using Park Assist must be fulfilled
⇒ Prerequisites.
•Press the button.
•Use the turn signal and main beam lever to select the direction (left or right) in which you would
like to drive out of the parking space.
•Select reverse gear.
•Release the steering wheel when the following message is shown: Steer. intervention active.
Check area around veh.!
•Carefully press the accelerator.
•Brake when an acoustic signal sounds, the white symbol lights up or when the prompt to
drive forwards appears on the instrument cluster display.
•Depress the brake pedal until Park Assist steering activity has been completed or until the white
symbol disappears on the instrument cluster display.
•Repeat reversing and driving forwards until a corresponding message is displayed on the
instrument cluster. A signal tone may also sound.
•Take over steering with the steering angle set by Park Assist.
•Drive the vehicle out of the parking space when permitted by the traffic situation.
Troubleshooting
First read and observe the introductoryinformation and safety warnings⇒
Introduction
No sensor visibility, error message, system switches itself off
Park Assist is switched off if a sensor fails.
•Clean the sensors or remove stickers or accessories from the sensors and cameras ⇒ Caring
for and cleaning the vehicle exterior.
•Check whether any damage is visible.
The system is not responding as expected
•The sensors are dirty ⇒ Caring for and cleaning the vehicle exterior. The sensor visibility may
be impaired by dirt and snow or also residue from cleaning agents or coatings.
•The system requirements must be met ⇒ Prerequisites.
•The sensors are covered by water.
•Park Assist cannot be switched on if the factory-fitted towing bracket is electrically connected to
the trailer. For vehicles with the trailer manoeuvring system, this function is switched on when
the button is operated ⇒ Trailer towing.
•The vehicle is damaged in the area of the sensors, e.g. caused by parking collisions.
•The detection ranges of the sensors are blocked by add-on parts, e.g. bicycle carriers.
•Changes have been made to the paintwork in the area of the sensors or structural modifications
have been made, e.g. on the vehicle front end or the running gear.
•The ultrasound signal is subject to interference from external noise sources, e.g. rough tarmac
surface or cobblestones.
Response to all circumstances
•Switch off the system temporarily.
•Check whether any of the causes described below apply.
•You can switch the system back on again once you have rectified the cause of the problem.
•If the system still fails to respond as expected, have the system checked by a qualified
workshop.
Area View
Introduction
This chapter contains information on the followingsubjects:
⇒ Prerequisites
⇒ Switching on and off
⇒ Display representation
⇒ Operating camera views
⇒ Troubleshooting
Area View provides you with an
overview of the area around the vehicle
•If the system still fails to respond as expected, have the system checked by a qualified
workshop.
Trailer Assist
Introduction
This chapter contains information on the followingsubjects:
⇒ Prerequisites
⇒ Operation
⇒ Troubleshooting
Trailer Assist helps the driver when
reversing or manoeuvring the vehicle
when towing a trailer.
The trailer manoeuvring system steers a trailer by adjustment of the rotary knob for the exterior
mirrors. The driver must control the accelerator, gear changes and brake!
System limits
The camera may not always be able to detect objects such as trailer drawbars, thin rails, fences,
posts, trees and open or opening boot lids. This can result in damage to your vehicle.
The camera must be kept clean and free of ice and snow, and must not be covered up by stickers
or other objects, as this will prevent the system from working properly. The drawbar must not be
covered.
Trailer Assist should only be used when the boot lid is fully closed.
The trailer manoeuvring system will be automatically ended around ten minutes after
activation. The function will also be ended if no driver interaction is detected within a period of
approximately three minutes.
Prerequisites
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The following prerequisites must be met for the trailer manoeuvring system to function:
•Engine running.
•ESC is switched on.
•Driver door and boot lid are closed.
•Exterior mirrors are not folded in.
•A single- or- two-axle trailer without steered axles is hitched to the vehicle and electrically
connected.
•Vehicle and trailer are stationary.
•Do not exceed the maximum jack-knifing angle.
•The drawbar length has been determined.
Determining the drawbar length
Trailer Assist requires a few turning and cornering manoeuvres to enable it to determine the length
of the drawbar. The more accurately it can determine the length of the drawbar, the bigger the
angles available when manoeuvring. The trailer manoeuvring system divides the available
maximum limit positions on the angle display into four steps: approx. 30°, 45°, 60° and 75°.
For technical reasons, the trailer manoeuvring system cannot always detect trailers with LED
rear lights correctly.
The trailer manoeuvring system does not use the area around the vehicle for orientation.
No obstacle detection takes place. Drivers must judge for themselves whether the trailer
can be manoeuvred safely.
•Always pay close attention to the movements of the trailer and, if required, stop the
manoeuvre to avoid causing any damage. On rare occasions the trailer may behave
differently, even when Trailer Assist is operated correctly.
•Do not rely only on the displays in the instrument cluster.
NOTICE