E90 owners: Am I asking too much?

[AzNMpower32]

The 325i is really gettin on my nerves. So to all you '06 325i or 328i owners, when the motor is warmed up, does the whole car vibrate when you're stopped at a stoplight?

I mean, it can't be too much to ask of a BMW. I just want the car to sit still. Like my X3, or the 335i, or most other cars. But everytime I stop at a light, after 4 or 5 seconds, the revs drop a tad.........and everything. The steering wheel, the seat.......it all vibrates ever so slightly. It's not terrible, but it's there alright. It's on the verge of giving me a headache because the headrest obviously vibrates as well. But it all goes away if I slightly touch the throttle to raise the revs a tad. So now I sit at stoplights with my left foot on the brake, the shifter in N, and the right foot slightly on the gas pedal.

The tech noticed this as well, but was unable to offer a solid explanation. He says they can't adjust the idle speed. The motor mounts are solid. The tests came up clean. So I'm stuck because I dunno what to ask of him............I'm not going to ask him to replace the whole motor.

So, perhaps its too much to ask of BMW to make the car idle smoothly thesedays.