Function of Cross Traffic Alert
Vehicles with Blind Spot Assist: the Cross Traffic Alert function can warn drivers of any crossing traffic when reversing out of a parking space. The radar sensors in the bumper also monitor the area adjacent to the vehicle. If a critical situation is detected, symbol 
appears in the multimedia system display. If the driver does not react to the warning, the vehicle can be braked automatically.
If the radar sensors are obstructed by vehicles or other objects, detection is not possible.
The Cross Traffic Alert function is active under the following conditions:
If Blind Spot Assist is activated.
If the vehicle is reversing at walking pace.
If the manoeuvring assistance function is activated in the multimedia system.
The Cross Traffic Alert function is not available on inclines and when driving with a trailer.