I just bought a 2000 TT Quattro, 180 hp turbo with 39K miles. In the last 3 months Ive had to replace the CD changer, instrument cluster, a sensor for washer fluid and a component for the driver side door window. The car was absolutely immaculate when I bought it from the Audi dealership. It appears to have been well cared for. I'm concerned that there may be an on-going problem with electrical components. Any comments?