Had same problem about a month ago, back to delaer and paid around 40 USD. problem gone. so far so good.
I really disapoint with the E65 7. My car going to like a chick! so many problems with it...
E38 X2 had. E39 X5 had. E46 X1 had. E65 X2 had. E71 X1 now. E84 X1 now. E90 LCI now. VW JETTA X2 had.
LOTUS ELISE SPORT X1 had. NISSAN BLUEBIRD U12 X1 had.
LEXUS SOARER 2.5T/T X1 had. CADI SRX X1 had.