To activate/deactivate:

press the button.

When Blind Spot Assist is activated, grey radar waves propagating backwards appear next to the vehicle in the assistance graphic in the multifunction display. If you drive faster than 30 km/h with Blind Spot Assist activated, the radar waves in the assistance graphic appear green. Blind Spot Assist is ready for use.

If you switch on the ignition while Blind Spot Assist is activated, the warning lamps in the outside mirrors light up for approx. 1.5 seconds.