So what’s involved in swapping a 603 pump? I’m going to get a dieselmeken pump and install it on my w210 e300 1999. How will the electronics communicate and what will I have to do to fix the errors in the system? Haven’t found much online telling me. Will I need a stand alone?

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k