This concerns Hella headlights with AFS / cornering lights / kurvenlicht and the E55 projector. The AFS function is quite nice because the system turns the projectors when the steer is turned left or right to have optimal lighting in corners. Unfortunately, the projectors are a weak point and the reflective layer on the inside deteriorates and light output is reduced a lot.When you have AFS and D2S bulbs, we advise the EvoX-r 1.0, because it is a bit easier to mount than the 2.0.When you have AFS and D1S or D3S bulbs, you need to use the EvoX-r 2.0, because the 1.0 can't hold D1S/D3S bulbs. The 2.0 has a better light output than the 1.0 so that's a plus, but be advised, it takes a bit more effort to mount because you need to make some small modifications (drilling some holes) to the projector to make it fit the Hella E55 AFS system.