hi guys i have a 2003 audi a4 2.0 fsi saloon 97k on clock , when im at a stand still and temp is normal the idle needle drops a tiny bit which makes the car slightly vibrate for 5-10 seconds , this only happens every 2mins at a stand still does anybody know what this could be and help me stop this problem , thanks karl

 

Im in a similar situation. i changed my spark pluggs and cleaned the air intake filter in my 99 a4 quatro. so i know its not that but when i installed my stereo i had to disconnect the battery and ever since then when i feather the gas or come to a stop the rev drops to almost stalling then goes back to normal. some one said use vag com to fix but will it work itself out?