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 media display. If the driver does not respond to the warning, the vehicle's brakes can be applied 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.
System limitations
The Cross Traffic Alert function is not available on inclines and when driving with a trailer.