Would greatly appreciate some advice about my car. It's a 2008 Audi A4 2.0T Quattro Titanium with 95k. I think at about 40mph or above (depending on the day) I start to get a vibration felt throughout the car. Seems worse on some days rather than others. I am on my second set of rims and third set of tires. Have tried to re-balance the sets but still no luck...