some 3.0 models will exhibit this problem, there is a software error in the DME. This would be covered under 8/80 emissions warranty, if the situation applies to your model. although it may appear that the check engine lamp will come on, it is because it is federally mandated that the check engine lamp comes on with ignition on. So when your vehicle stalls, its as if the ignition is on, so the check engine lamp comes on, and there is no fault stored. Reference SIB 12 57 06. Bring it to your BMW dealer, and complaint "Customer reports erratic idle at low speeds while performing parking manuvers." Agree to pay the diagnostic fee, if the shop knows what they are doing, they will reprogram the engine control unit for free under the emissions warranty. If they attempt to charge you, mention the 8/80 emissions warranty. The engine control unit is covered under this warranty, and any reprogramming of such device would be covered.