A lot of odds and ends stuff. The big thing was for the timing belt to get done, along with idler pulley, tensioner pulley, waterpump, and I think that's it... can't remember. Serpentine (sp?) belt (mine was about to go apparently when I had my 90k done), bleed the brakes, check tires, grease door hinges, plugs, wires, and a few other odds and ends. Basically a LOT of checking that they can charge you a boat load for... and not have much to show for it in the end.
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A4: LOTS 'o extras
4000S: MC1, NF head, 34mm exhaust valves, 2871 turbo, 034 Ib ECU, VAP CCK, pro-mounts, and some stiff azz springs!