I have an '11 35d and auto hold doesn't work on mine either. The 'brake on hill' (or whatever its called) does, but auto hold doesn't.

I had read about it a couple of weeks ago and tried it in my car and it didn't work. I thought I was just doing it wrong or something, but I tried it in an X6 the other day and it worked.

OP has a '10 35d. Anyone with an '11 35d get it to work? Do you have to have some option like the auto cruise or something?