I no longer have my 850, and my memory is fading so I am not sure exactly, but I assume you need a Torx bit to align the headlights. I believe there were two adjusting points on each headlight. I usually use a wall to correct the beam-aiming angle.
See if someone else could chime in for more accurate info.
Last edited by JPN; 12-18-2012 at 08:53 AM.