IMHO, If you've got the stuff on hand I'd go ahead and do the diesel purge, then replace the fuel filters. I also replaced all of the rubber fuel lines at about that point. My car was a litle old lady car, that wasn't driven much in the last three years, so I had a fungus in the fuel problem. Wound up removing the tank and cleaning it out. It was amaizing the black crap that came out of the IP and back into the clear bottle. My wife said it made the car idle smoother. Nuff said.

Chuck.

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2000 C230 Kompressor "Frosty"

2007 PT Cruiser
2001 VW TDI Beetle
1999 Landrover Discovery II
1971 Corvette

Gone: 97 Cabrio, 83 240D, 93 VW Eurovan, 95 Volvo 850, 93 Chevy Astro Van, 77 VW Bus, 99 VW Jetta, 74 VW Bus