I've recently got my $300 300D running like a cherry almost with the exception of needing some new injectors with three cans of diesel purge, draining the tank, and replacing the filters.

Pressure washed the motor recently to look for any problematic oil leaks and found some leaks. So far a PS leak, and an IP leak that is an issue. Neither affect drivability, but I don't want this car to continually stain my driveway.

The IP is leaking. I'm assuming it needs to be re-sealed. Is this doable for a DIY mechanic? I have every hand-tool imaginable and any air tool you'll need, but I don't have a lot of "special" tools for MB.

What is the difficulty and would my best bet be taking it to my friend who is long time MB mechanic who could cut me a deal on labor?

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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