I did two weeks ago. Here is a video of the outcome. In a class of all stock 6, 8 and 12 cylinder BMW's, I took 3rd. By far the most limiting factor is the all season tires. Take a look at my post and discussion in a topic earlier regardin the February 26, 2006 BMW CCA LA auto-x.

http://randall-harris.com/X3_Auto_x.html