If I want my diesel to last forever, what all do I need to do? Of course, I know oil changes and fuel system purges are important, but please give me details, brand names, ways to keep costs reasonable (I'm not a mechanic), simple things I can do myself. Also, if a Mercedes seller doesn't want to go to the trouble of letting me take the car to a mechanic, are there any telltale ways I can detect if an engine, transmission, or components, are wearing out?
Also, I've been told that diesels are notorious for having small oil leaks. Are there ways to stop leaks without expensive mechanic bills? Is there an additive that really helps?