Leave it alone! Thought the major factor of buying a new one was to have a warranty, and not need to work on it. Now once the warranty is out, game on do whatever, but I say leave it alone for now. I've had the entire fuel system and glow plugs replaced this yr in my Jetta, under warranty, didn't even charge me for the loaner/rental car while working on mine. Work on the '02 if you're bored. I wouldn't even run any fuel additives, don't give them any excuse to void the warranty. Oh, my Jetta is also a CP4 pump.
Sent from my SM-G975U using Tapatalk