Hi newbie here... I am looking at an 02 A4 1.8T Sport 4dr saloon today, just wondered if there was anything specific that I should be looking at, any known problems etc. Also it doesn't have CD changer, are these expensive to get retro fitted? Thanks, BTW it 36000 miles, mint condition, BOSE upgrade, aluminium trim for £12500. Is this about right? Thanks in advance.