It's just a roof...not really much that could go wrong with it. Just take care of it the same as any roof.
2011 Le Mans Blue M3// Black extended Novillo w/ Blue Grey Aluminum trim/DCT/ZTP/ZCW/ZPP/ZCP Premium Sound ///Akrapovic Evolution Exhaust
2012 Le Mans Blue 135i M Pkg DCT
2008 Brilliant Red Audi TT 3.2 Quattro 6M