I brought the car in today and met with the service manager who said they are going to do a full check up on it. Apparently it already had the valves cleaned 2 years ago so they put in new plugs. They took it out for a test and still doing it. He told me they looked in the the valves and they are carboned up again and they're going to have to keep it the weekend. They gave me a 2012 335xi coupe to beat on over the weekend though. I just drove that 80 miles back home and I like my 5 year old 535xi alot more than the coupe I'll keep you all posted. Definitely A++ for the dealership though for taking care of me!
2008 BMW 535xi (6-speed manual) Alpine white/ Dakota black/ Anthracite bamboo. Premium/Cold/Sport Packages, L7, Nav, 76,000 miles.