Rida Mirza 
2006 BMW M Convertible 2dr Convertible (3.2L 6cyl 6M)
I returned this to the Dealer 28  Aug
 Hi - BMW has finally decided to take my Z4 M Roadster back. Had it since April on a lease and had been in at the dealership 15 odd times till August 28. Had multiple problems including: 1) Squeaks when the roof was down and when they fixed this 2) squeaks when the roof was up on the drivers side and when that was fixed 3) squeaks on the passenger side and when they fixed that 4) rattle in the a/c vents and when they fixed this 5) the windows would not close when the roof was put up unless I opened each door, did the window up and then shut the door and they changed the on-board computer and guess what - the windows still did not close!! It spent at least 4 weeks at the shop in 5 months!!