The car starts acting up only when it heats up. I changed the entire air intake. If there was a vacuum problem it would have been resolved after the replacement of the air intake hoses.
Parts 10, 12, 13.
http://realoem.com/bmw/showparts.do?...47&hg=13&fg=20
I cleaned the MAF with alcohool although it was clean as a whistle. I change the air filter every 10.000km.
Spark plugs have 40.000km, coils are fine.
I also changed the engine temperature sensor.
I had an update for the software of the car at an BMW dealer.
However I found oil in the intake manifold. I don't think thats normal....