After my 2010 M3 powered down on the highway I had it taken to my dealership by flatbed where they kept it for 24 days and used a quarter tank of gas, or roughly 100kms. Anyone else experience this kind of "service"? They're not certain that the problem has been fixed either, although they replaced the vacuum pump. I asked to be included on diagnostic test drives, but never heard from them when these were taking place.