My '92 100S recently passed 60k. My dealer said the only thing that needed done was to change the plugs, and also the timing belt. I had the timing belt replaced by an Audi specialist in my area. The actual belt was $48, the seal was $11, and 1.5 hours of labor @ $42 an hour. The complete job costed me $122. Hope this was some help. Craig '92 100S (63k and leaking tranny fluid)