[JimD]

I looked for what I have on my hard drive and did not find a brochure for my 2009 n52 convertible. I did find one for my ex wife's 2013 n52 convertible and it shows an M option and no sport option. I got the sport option and when parked side by side, my 2009 was obviously lower than her 2013 non-sport or M sport. Her wheels are 16 inch and the same width front and back. Mine are 17 inch and 7 inches wide in front, 7.5 in back. I don't think they offered an M-sport option in the U. S. on the convertible in 2009 but my owners manual seems to indicated they did somewhere. It has 128i convertibles with the same 18 inch wheels and tires as the 135i. Bigger wheels and wider tires than my car. That suggests to me an M-Sport option, but perhaps not in the U. S.. I am unsure. I think I have a paper brochure but I don't know if I can find it.