When I bought the car I was told specifically on multiple occassions that the car was never winter driven. I thought buying at a BMW dealership mean't I was buying something certified, tested, repaired, etc.... I never even thought to ask to look under the car, I shouldn't have had to but this goes to show that don't trust BMW dealerships or at least the one I went to. I found out last week the car was painted 4 times (it showed in the service history, now they don't want to give details on the painting/bodywork so I need a subpoena).
From my understanding BMW Germany is now reading this thread, I forwarded them the link and they've been asking questions via email. I'm not sure where it'll go but everyone reading this thread will know the outcome that is a gurantee.