Could use any input/information on a problem my E39 has had for quite a while (and nobody seems to know why!! ). It has to do with idling, especially in the first 5-10 minutes of driving. Here's the deal: In the morning, especially here in the wintertime in the Northeast, I start the car and let it "warm up" for about 5-10 minutes or so. Then, once I start to back out of the driveway, I have to wait for any passing cars. While waiting, the tach needle bounces up and down between 1000 RPMs and, let's say, around 500 or so...up and down. The car feels as if it's going to stall, and at this point I wish I had 3 feet...one each for the brake, clutch, and the gas to keep it from stalling. A mile from my home is a stop sign, and while waiting for my chance to go, it happens then. This will happen another 2 times or so on my trip, until I get onto the highway. I have mentioned this to my mechanic several times and they don't notice any reason for this...no codes, no noticeable air/vacuum leaks, nothing. Even a trip to the dealership produced no noticeable causes from their service advisers. Just so we're clear, this car has had a new radiator installed, all new oil gaskets, new oil separator and VANOS "stuff" installed...lots of things. The car runs and drives like a dream...I have suffered no loss of gas mileage or power at all. Have any of you E39 drivers had similar issues to this? Is this a known issue with these cars and if so, what could be causing it? Any information on this would be much appreciated.