[timhatimay]

The steering sensation you are feeling is what I felt after installing the front M3 bits. It would be difficult to first initiate the turn, then after the wheels turned, the steering wheel would "take off" and drastically pull to that side. It also took a lot of effort to re-center the wheel. I would suggest not driving your car unless its to the alignment shop. You're toe is very far off (caster should be unchanged, and camber should be slightly increased). In fact a shop turned me away, because my alignment was so far out of whack, they didn't want to touch it. This is the reason that every single DIY of the M3 suspension make very clear the necessity to get an alignment immediately after install.

Also, for the headlight sensor, there should have been something previously attached to the control arm. The one there will not fit back on the M3 arm, so you need the new arm that bolts onto the control arm. Like mentioned, most kits come with this piece already.

Go get the car aligned so you can enjoy the upgrade!

Tim