1984 300D with 197,000 miles showing on the odometer.
After reading all the awful stories about Vacuum pump failures causing timing chain failures I decided to pull mine off and check it (197,000 miles). Everything looked normal and there was nothing that looked at all worn .
I was wondering if anyone could tell me which of the parts inside the Vacuum pump is prone to failure?
Or, is it always that by the time the damage is over with there is now way to tell what failed?