Let me say that until last Saturday, I had not even ridden in an MB, much less owned one. So, I apologize in advance for any stupid questions. I have similar concerns as JHZR2, only I have the 613 engine (I think that is correct, it is an 87 300SDL). If you were to completely bypass the mechanical lift pump, is there a blocking plate you can get to take its place on the IP. Maybe one isn't necessary, I don't know.

Also, I only ask this because I don't have my service manual yet, there is a little part that the fuel flows through before it passes on to the lift pump. It is located just below and rear of the lift pump. What is it? Will vegetable oil hurt it? Can I remove it? I only ask the last question since it will make my plumbing much easier and give me more space if I could just get that thing out of the way. It looks to have extra lines running off of it going towards the back of the engine, so I assume it is probably something relatively important. Thanks for any information anyone can share.

__________________
Keep everything as simple as possible-but no simpler--Albert Einstein