What is your thinking on the exterior color? I'd start there, then match the interior. In a vacuum, I'd vote for Terracotta. It looks richer than Oyster IMHO and will be a lot easier to take care of. My car is AW and I considered the Terracotta, but in the end went with Boston Black for a classic look that I thought would work really well with the Shadowline exterior trim. If you go Terracotta you might consider the Grey Poplar which I think now is Anthracite.
2012 135i M-Sport