Just had mine back to the dealers for the 19th (!) time since I got it on June 10th last year. 3rd roof, 4th set of rearside windows and lots of rattles and squeeks. My right rear window squeeked since the mounting of the last roof. The middleconsole (English word? the thingie where the radio is in :-) ) rattled and you heard a lot of windnoise on the right side.
"Sorry, we cannot alter anything anymore. A convertible always makes more noise..." Yeah, duhu! So I asked the dealer to put in writing that they could not help me anymore, because then I would go to BMW Netherlands. Suddenly they really wanted my car in the shop another time. This was 2 days last week and everything is finally OK for now. Crooks...
(as much as I loved my car in the summer, as fed I am with it right now. I wish the weather was better...)
If you think everything is under control
You are going too slow