NotFiona
Member
I've been trying to find an annoying rattle/buzz/vibration in the door pocket area of my CLK. Finally tracked it down to a loose bit of trim using an excellent free iphone app! The app is called sonic, logo below. It's a tone generator and you play it through the audio system using bluetooth. Simply scan up and down until you find the exact frequency that causes the panel to vibrate, in my case it was 86hz, then it's prod and pull until it stops. 
