I'm totally with you man. I got 35% all around and really wish I had done 15%... but maybe I'm too ghetto.
To answer your question... I seriously doubt they will redo it for free... maybe ask for a discount?
My girl: Heidi - 2008 335i Sedan, Steptronic, TiAg, Black Dakota, Sport/Premuim, Aluminum Trim, Navigation, Comfort Access, HD Radio, iPod, PDC, Sunshades.... she's loaded.