where in jersey are you...if you are not to far check out Orange county BMW i really like their service dept...and recently westchester BMW was purchased by ray cantena and their service dept has been kicked up a bunch of notches because of it... i have found both good but orange county's diagnostics pretty great....
if you are close enough and decide to go there pm me for contact pp and numbers
2012 GT 550ix Msport (feb12)(ok early march 12)
09 X5 4.8
12 X3 35i (the wife)
61 356 roadster