I bought a 2007 A4 Audi Cabriolet Quattro convertable a few months ago. I am very disturbed at the fact of the terrible vibration it has when stopping or idling. We have had it to the dealers twice and they have informed me there is nothing wrong with the car. I don't feel a car of this caliber should be doing this. Do you have any ideals of why it would vibrate? We use the gas and add additives to the gas like ther dealer instructed us to do. Please help, I am getting very discouraged over this.

There are no check engine lights coming on. Had it to the dealer the other day for this problem and after all the computer type tests on it they told me this is a problem common in the Audis and just something the Audi does. I can't see that this vibration is something that is normal for these cars. There are no check engine lights coming on. Had it to the dealer the other day for this problem and after all the computer type tests on it they told me this is a problem common in the Audis and just something the Audi does. I can't see that this vibration is something that is normal for these cars.