Warning and auto-braking while backing up*
The functions Rear Auto Brake (RAB)* and Cross Traffic Alert (CTA)* are only active when the vehicle is moving backward or if reverse gear is engaged.
- A warning signal and the Park Assist graphic illuminate to indicate the location of the obstacle.
- If the driver does not react to the warning and a collision is unavoidable, the vehicle may automatically brake, and a message will appear explaining why the brakes were applied.
If the accelerator pedal is depressed forcibly, the vehicle will back up even after auto-braking.
Warning
- The functions are supplementary driver support intended to facilitate driving and help make it safer – they cannot handle all situations in all traffic, weather and road conditions.
- The driver is advised to read all sections in the Manual about these functions to learn of limitations, which the driver must be aware of before using the functions.
- Driver support functions are not a substitute for the driver's attention and judgment. The driver is always responsible for ensuring the vehicle is driven in a safe manner, at the appropriate speed, with an appropriate distance to other vehicles, and in accordance with current traffic rules and regulations.
Note
Obstacles directly behind the vehicle
Rear Auto Brake is designed to help the driver detect stationary obstacles directly behind the vehicle when backing up.
This function is primarily designed to detect stationary objects that are taller than the rear bumper and not, for example, moving vehicles.
Auto-braking with Rear Auto Brake is active at speeds under 10 km/h (6 mph).
The auto brake needs to be deactivated before entering automatic car washes and may also need to be deactivated to avoid undesirable interventions, e.g. when backing up in tall grass.
Obstacles from the side
Cross Traffic Alert is intended to help the driver detect vehicles crossing behind the vehicle while backing up.
This function is primarily designed to detect larger moving vehicles, but in certain cases can also detect pedestrians or smaller objects such as bicycles.
Auto-braking with Cross Traffic Alert is active at speeds under 15 km/h (9 mph).
The auto brake needs to be deactivated before entering automatic car washes and may also need to be deactivated to avoid undesirable interventions, e.g. when backing up in tall grass.
Examples of detection and limitations
The function's sensors cannot detect movements in traffic through other parked vehicles or objects blocking the vehicle. Here are some examples of when approaching vehicles can therefore not be detected until they are very close.
Blind zone
The function's field of vision
However, as you back your vehicle slowly out of a parking space, CTA's field of vision changes in relation to the obstructing vehicle/object and its blind zone is reduced.
Backing up with equipment connected to the towbar
RAB and CTA are automatically deactivated when a trailer, bicycle holder or similar is connected to the trailer contact. If the connected equipment does not have an electrical connection, RAB and CTA must be deactivated manually via the button in the center display.