The "Blue Flying Saucer" (As 'Tis Known) [Mercedes Speak= Vacuum Amplifier] when CLEAN (Along with ALL it's ancillary parts) works VERY well.
'Have you stumbled upon the "Advanced", "Search" option YET?
I'm unaware of a DIY for it's "Improvement" (Removal),BUT then I'm not
looking.
You'll WANT to keep the Overboost Protection system working!
Your Journey will begin here:
http://www.peachparts.com/shopforum/diesel-discussion/212097-wastegate-actuator-swap-om602-962-a.html
OM603 specific:
http://www.peachparts.com/shopforum/diesel-performance-tuning/273078-om603-performance.html
Light reading for the Holiday:
http://www.peachparts.com/shopforum/diesel-discussion/103444-have-theory-603-14-head-fractures-part-1-a.html