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Fig. 131 On the instrument cluster display: parking perpendicular to the road.
First read and observe the introductoryinformation and safety warnings⇒Introduction
Key to ⇒ Fig. 131 :
Choose parking space.Position for parking.Align the vehicle in the parking space.1Prompt to
drive forward.2Your vehicle.3Parked vehicle or obstacle.4Detected parking space.5Prompt to select
reverse gear.6Prompt to press the brake pedal.7Progress 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.
Let go of the steering wheel ⇒ .
Select reverse gear when a reverse arrow appears on the instrument cluster display.
Accelerate carefully.
Brake when an acoustic signal sounds to indicate that you should change direction, an arrow
⇒ Fig. 131① lights up, the display lights up or a message is shown.
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
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Fig. 132 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. 132 :
Parked vehicle.
Own 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 if the prerequisites for this are met
⇒ Prerequisites .
Press the button.
Use the turn signal 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.
Monitor vehicle area.
Accelerate carefully.
Brake when an acoustic signal sounds, the display lights up or until the prompt to drive forward
appears on the instrument cluster display.
Depress the brake pedal until Park Assist has finished steering or until the display in the
instrument cluster display will go out.
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.
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Troubleshooting
First read and observe the introductoryinformation and safety warnings⇒Introduction
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.
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.
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.
Possible solution
Switch off the system temporarily.
Check whether any of the causes described 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.
Automatic cancellation of driving in/out of a parking space
Park Assist cancels parking or driving out of a parking space in the following situations:
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.
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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.
The parking manoeuvre is ended if an automatic braking intervention occurs.
Rear Traffic Alert
Fig. 133 Illustration of Rear Traffic Alert: monitored area around the vehicle leaving the parking
space.
Fig. 134 Display in the Infotainment system: Rear Traffic Alert.
Rear Traffic Alert is part of the Blind Spot Monitor ⇒ Driving with the Blind Spot Monitor .
Switching on and off
By means of the Assist systems menu in the instrument cluster ⇒ Vehicle settings menu .
OR: with some equipment levels, by means of the button for the driver assist systems ⇒ Button for
driver assist systems .
OR: with some equipment levels, in the Driver assistance menu in the Infotainment system
⇒ Infotainment system controls and displays .
Function
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Rear Traffic Alert monitors the traffic crossing behind the vehicle when reversing out of a parking
space or manoeuvring. Rear Traffic Alert functions using radar sensors in the rear bumper.
Key to ⇒ Fig. 134 :
Critical situation. Do not drive on!Possible critical situation.
Detection of a critical situation can also take place acoustically:
A warning signal will sound and a text message will be displayed in the instrument cluster for
vehicles without Park Distance Control.
In vehicles with Park Distance Control, an acoustic signal will sound with the continuous tone of Park
Distance Control. If the Park Distance Control is deactivated, no warning can be given to the driver
and the Rear Traffic Alert system will also be switched off temporarily.
If there is a system fault in the scanned area, the indicator lamp will light up yellow on the
instrument cluster display.
Automatic braking intervention to minimise damage
If Rear Traffic Alert detects an approaching road user and the driver has not pressed the brake, the
system can brake automatically.
Automatic braking intervention is activated when reversing at speeds of between 1–12 km/h (1–
7 mph). The vehicle is held stationary for up to two seconds after vehicle standstill has been
detected.
After automatic braking intervention is activated to prevent damage to the vehicle, the system
requires approximately ten seconds before it can activate another automatic braking intervention.
Automatic braking intervention can be interrupted by pressing the accelerator or brake pedal
sharply and taking control of the vehicle.
Automatic deactivation
Rear Traffic Alert is deactivated automatically and cannot be switched on if the factory-fitted towing
bracket is electrically connected to a trailer or similar ⇒ Notes on towing a trailer . Once a trailer is
electrically connected to the vehicle and the driver pulls away, a text message appears in the
instrument cluster display to inform the driver that Rear Traffic Alert has been deactivated. Rear
Traffic Alert will be automatically activated again when the trailer has been unhitched from the
vehicle. This applies if the functions were previously activated. Rear Traffic Alert must be switched
off manually for trailer towing if a non-factory-fitted towing bracket is used.
WARNING
The intelligent Rear Traffic Alert technology cannot overcome the laws of physics, and functions only
within the limits of the system. Do not let the assistance function of Rear Traffic Alert tempt you to
take any safety risks while driving. The system is not a substitute for the full concentration of the
driver.
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Never use the system where visibility is restricted or in unclear traffic situations, e.g. on extremely
busy roads or across several lanes.
Always pay attention to the area around the vehicle, since cyclists and pedestrians are often not
reliably detected, for example.
The Rear Traffic Alert will not always independently bring the vehicle to a complete stop.
Brake support systems
Information on brake support systems
The vehicle is fitted with brake support systems. The systems can support the driver in critical driving
or braking situations. Brake support systems cannot overcome the limits of physics and cannot
always keep the vehicle under control in every single critical driving or braking situation. The driver is
responsible for driving safety ⇒ .
Driving with brake support systems
The brake support systems work when the engine is running. They do not need to be operated
separately.
The brake pedal may pulsate or noises may occur while the brake support systems are regulating.
Continue to apply the necessary amount of brake pressure. Apply the necessary pressure to the
brake pedal consistently. If necessary, steer the vehicle while the brake pedal is depressed.
Electronic Stability Control (ESC)
ESC helps to reduce the risk of skidding and to improve driving stability in certain driving situations
⇒ .
ESC is always switched on.
Traction control system (TCS)
The TCS reduces the drive output if wheelspin occurs and adapts the drive output to suit road
surface conditions ⇒ Troubleshooting . The TCS makes it easier to pull away, accelerate and drive up
hills.
With some equipment levels, the TCS can be switched off in exceptional circumstances ⇒ Switching
the TCS on and off .
Anti-lock brake system (ABS)
The anti-lock brake system can prevent the wheels from locking when the brakes are applied up until
the point where the vehicle is nearly stationary and assists the driver in steering the vehicle and
keeping it under control ⇒ Troubleshooting .
Brake assist system
The brake assist system can help to reduce the stopping distance. The brake assist system reinforces
the braking force when the driver depresses the brake pedal quickly in an emergency situation.
If you reduce the pressure on the brake pedal, the brake assist system will switch off the brake
servo.
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Electronic differential lock (EDL and XDS)
EDL brakes a spinning wheel automatically and distributes the drive force to the other drive wheels.
The EDL switches off automatically under unusually heavy loads to prevent the brake from
overheating. The EDL switches back on again automatically as soon as the brake has cooled down.
XDS improves traction in order to keep the vehicle on its intended course.
Automatic Post-Collision Braking System
In the event of a collision, the Automatic Post-Collision Braking System can help the driver to reduce
the risk of skidding, and the danger of secondary collisions, through automatic braking.
The Automatic Post-Collision Braking System functions only for collisions that are detected as a
collision by the airbag control unit.
The vehicle is braked automatically if the required systems have not been damaged in the collision
and have remained functional.
The following actions override automatic braking in the event of a collision:
When the driver depresses the accelerator.
When the brake pressure transmitted through the depressed brake pedal is greater than the brake
pressure provided by the system.
WARNING
The intelligent technology used in brake support systems cannot overcome the laws of physics, and
functions only within the limits of the systems. Driving fast on icy, slippery or wet roads can lead to a
loss of control of the vehicle and could cause serious injury to the driver and passengers.
Always adapt your speed and driving style to suit visibility, weather, road and traffic conditions. Do
not let the extra safety afforded by the brake support systems ABS, BAS, EDL, TCS and ESC tempt you
into taking any risks when driving.
The brake support systems cannot overcome the laws of physics. Slippery and wet roads will remain
dangerous, even when the ESC and other systems are active.
Driving too fast on wet roads can cause the wheels to lose contact with the road surface and
aquaplane. The vehicle cannot be braked, steered or controlled once it has lost contact with the
road surface.
Brake support systems cannot prevent an accident if, for example, you are driving too close to the
vehicle in front or are driving too fast for the individual situation.
Although the brake support systems are very effective and can help to control the vehicle in difficult
driving situations, please always remember that the driving stability of the vehicle depends on the
tyre grip.
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When accelerating on a slippery surface, for example on ice and snow, accelerate carefully. The
wheels can spin even when brake support systems are active, and this can lead to a loss of control of
the vehicle.
WARNING
The effectiveness of ESC can be reduced considerably if other components and systems which affect
driving dynamics are not serviced properly or are not functioning properly. This also applies, but not
exclusively, to the brakes, tyres and other named systems.
Please always bear in mind that modifications and changes to the vehicle can affect the way brake
support systems operate.
Alterations to the suspension or the use of non-approved wheel and tyre combinations can affect
the function of brake support systems and reduce their effectiveness.
Suitable tyres support the effectiveness of ESC.
WARNING
Driving without the brake servo can considerably increase the braking distance and thus cause
accidents and serious injuries.
Never switch the engine or ignition off while the vehicle is in motion.
If the brake servo does not function or the vehicle is being towed, the brake pedal will have to be
depressed more forcefully as the braking distance will be increased due to the lack of assistance for
the brake system.
Switching the TCS on and off
Switch off the traction control system (TCS) if the vehicle does not have sufficient traction:
When driving in deep snow or on loose surfaces.
When rocking the vehicle free if it is stuck.
Then switch on TCS again.
Switching TCS on and off
TCS can be switched off and on in the Infotainment system ⇒ Infotainment system controls and
displays .
When the TCS is switched off, the yellow indicator lamp lights up on the instrument cluster
display.
As soon as the TCS starts regulating, the indicator lamp flashes yellow.
Troubleshooting