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A warning sounds if the system detects approaching traffic behind your vehicle when backing up
⇒Fig.142 (red area).
Vehicles without Park Distance Control (PDC): There is a warning tone and a text message in the
instrument cluster display.
Vehicles with Park Distance Control (PDC): There is a continuous warning tone from the PDC. If
PDC is switched off, a warning for the driver may not be possible, and therefore the Rear Traffic
Alert is also switched off.
If there is a system malfunction in the scanned area, a yellow indicator light appears.
Automatic braking
If Rear Traffic Alert detects an approaching vehicle and the driver does not press the brake pedal, the
system can intervene with automatic braking.
Rear Traffic Alert assists the driver with harsh automatic braking that could help prevent or reduce
damage that can result from a collision. Automatic braking occurs while backing up at speeds be‐
tween 1–7mph (1–12km/h). Once the system detects that your vehicle is not moving, it keeps the
vehicle from moving for up to 2seconds.
After automatic braking, about 10seconds must pass before the system can brake automatically
again.
The driver can interrupt the automatic braking and take control of the vehicle by pressing firmly on the
accelerator or brake pedal.
Automatic deactivation of Rear Traffic Alert
The radar sensors for Rear Traffic Alert deactivates automatically if the system detects an obstruction
over a radar sensor. This could occur if the radar sensor area is covered by ice or snow, for example.
The Rear Traffic Alert deactivates automatically and cannot be reactivated when a trailer is electrically
connected to the trailer hitch. A text message appears in the instrument cluster when a trailer is elec‐
trically connected and the driver starts to drive. Once the trailer has been disconnected, Rear Traffic
Alert is automatically reactivated.
WARNING
The Rear Traffic Alert technology cannot overcome the laws of physics and limits of the system.
Careless or unintentional use of Rear Traffic Alert may result in accidents and serious injuries.
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