Soemtimes my engine starts quickly and sometimes when it starts it stalls after a little while.Further it hesitates and jerks during acceleration.Somebody recommended me to clean the air flow meter and then reinstall it.so i removed my air flow meter,cleaned it and then set it to dry for 30 minutes and then re installed it again.Still the problems wasnt solved so i went to mechanic and he suggested to get a new air flow meter.I recently bought this http://www.voguecollectionsltd.com/bmw-3--5-series-325-325i-525-525i-e36e34-air-mass-flow-meter-sensor-0280213011-35700-p.asp for my car. My problem is solved now.