I had taken a movie with my iPhone to demonstrate the ticking to them because it would only do it when it was cold in my garage. The Service Manager saw it and agreed that it was a problem. They agreed to fix it after they had done a couple to make sure the new fix worked. Luckily my car was at the dealers over night for another problem. The ambient temperature was cold and sure enough the engine ticked when they started it. That's the point when the ordered the parts for the new fix and the issue was solved. The only major problem was that they had my car for three weeks over the Thanksgiving holiday and waiting for the parts to come from Germany. I've had the car back for 1 day and it was really cold here (in the 30"s) and when I started the car there was no more ticking. Like they say, "a picture is worth a thousand words". BTW I stand corrected-they did adjust the valvetronic alignment not the VANOS.
K4RPS 2008 135i. Z4 gone but not forgotten