what would cause fuel pressure to drop off completely when engine is turned off on 2004 Mercedes-Benz S600

on a 2004 mercedes s600

by in Miami, FL on August 09, 2013
1 answer 1 comment
ANSWER by , August 11, 2013
You know this HOW?
COMMENT by , August 11, 2013
with fuel pressure gadge hooked to fuel rail. it will start and pressure will return usually on second try.