Your head gascet # is 11 12 1 717 176, as it goes for cost, should be no more then, 20$ max. now I would do it myself, its not that hard, you can do it as well :) Also Mr.MKM3, I respect people like you who like all beemers. :) And I would replaice this gascet ASAP, do to what you describt, you are still in the safe zone.