I have the piano black window trimming on my 2008 520d Msport. Its bubbling on the same piece on both sides of the car. Its the small piece in the small window at the side. Can I replace that section or is it a case of having to buy the whole set? Also do these sections remove easily? I know that when I tried this with my Audi A4 I had to do break the small side window to remove the trim. I left it in the end and just sold the car with the new trim in box. Any comment/suggestions :) I can get pictures if required but I think people will have had the same experience, apparently its a common fault.