Sorry, I read a thread somewhere on this problem and I cannot seem to locate it!. There is a very annoying vibration noise coming from the inside of my drivers door. I did read a thread on it and as I recall it was quite common, I think someone quoted a technician at Porsche as saying 'they all do that'. I also recall someone had a solution, it was all to do with the door spring....help!...I have searched for door spring/vibration but cannot seem to locate the thread..and I would like to try and sort it out if possible..thanks

 

I am having the same issues. It's a very small vibration, but with the windows up and the radio off, it does apear sometimes.
Silly sunroof does that too sometimes, comes and goes.

 

Try raising the lid of the side pocket. I've noticed that that can cause a vibration.

 

I have the same strange sound coming from the door on my GT3. I think it might be coming from around the door opening mechanism. My girlfriend drives a VW as a daily car and when I drive her car I can hear a similar sound from the door opening lever/mechanism. I usually hit it and the sound stops.