mercedessource.com Kent explains what he did to fix a persistent power loss problem on an old Mercedes Diesel. Once he took the fuel cap off the fuel tank he had a pretty good idea what the problem was. And this one happens more often than you would think. A future related video is in the works and will be completed if there is enough interest. This applies to all older Diesels including the 170D 180D 190D 200D 220D 240D 300D 300CD 300TD 300SD 300SDL 350SD and 350SDL.