Originally Posted by Subnasty
At first I was expecting that I tanked some low quality fuel, but then I realized that Germans wouldn't allow that, so I immediately went to the closest BMW service to find out whats up.
Are you sure it doesn't have to do with bad fuel? Have they checked the fuel pump and quality of fuel?
Please, correct me if I am wrong: I was told that in case of bad fuel, one of the cylinders is -somehow- isolated (the engine runs with 3 cylinders) in order to protect the engine from breaking down.