Took my 1999 S80 T6 to my dealer for State Inspection and 100,000mi service today. While they had the car, they noticed that the oil return line from my turbo (could be both, they didn't say) was leaking slightly. Said they were hard to get to and it would cost about $600 to replace the seals. They suggested that I leave well enough alone for the time being. I'm sure it's just a matter of time until the leak gets worse. The repair on my 94 850 is pretty simple but does anyone know the problems you have trying to repair the S80?