i have a 1985 500sel and it has 215k i was wondering what kind of power i have lost. it is a euro model and has been drive easy smooth exlaeration and has had seal jobs done.

The first place to start is with a dyno run to see what you are packing for RWHP (rear wheel horsepower) That done, account for a 20% loss in the drivetrain for a conventional automatic. (what the dyno reads at the rear wheels should be about 20% less than what the rated spec at the crank is) To determine what you've lost...a compression and leakdown test is probably in order.

Hope this helps...Lee