Volvo uses four cameras (one of which is a trifocal 3D unit), four radars, one LIDAR, and 12 ultrasonic sensors. That's a reasonable sensor suite for this. Tesla has one camera, one radar, and some ultrasonic sensors. Not enough.
Volvo is also way ahead on self-driving car commercials.[2]
[1] http://www.volvocars.com/intl/about/our-innovation-brands/in... [2] https://www.youtube.com/watch?v=bJwKuWz_lkE