Hello Peter,

Have you had a chance to look up the info on the relay and plugs?
BTW, I have 340K on this engine, I never had the compression tested but do you think The Engine Restorer additive could help a high mile diesel engine?
With every oil change I add 2 cans of the LubroMoly Engine Saver additive and the engine seems to run fine. I timed the 0-60 Mph and got 12.3 seconds. It puts out some smoke under hard acceleration but seems to run good. My only problem is the cold starts when the heater is not plugged in and I want to improve that by doing the pre+post relay conversion. The EGR is plugged and the trap oxidizer has been removed, actually I opened up the trap, took the ceramic out, welded back the window and put it back. The MB dealer showed my car with the conversion already done so I could not get them to do it again. I don't know what the previous owner did with that.
To come back to your questions, the injectors are new ( 15K), ran a can of LubroMoly cleaner straight from the can, return in the can, about 4 months ago. The O-rings on the shaft in the oil filter have been changed 2K miles ago - last oil change 15W40 Rotella.

Marius