After buying my first Audi ('92 80q) and lurking here for a few months, I remain confused about all of the Audi model numbers (80, 90, 100, 200, A6, A4,etc.) Is there somewhere I could go (www?) to see a summary of models, years produced, and general features and configurations? I'm just trying to get oriented so I can follow the posts better. Thanks. John Pederson