The lines actually are nice and clear. I'm going to replace those 3, just because they will be off once I get the valve off. Given where the fuel seems to be coming from, I'm thinking this valve may be cracked, as mentioned. Is there and release catch on the electrical connector, or does it just pull off. Always careful not to get too forceful with the plastic parts on these cars for fear of the old brittle plastic breaking.

Her dad is a doc, so the car has been very well maintained since bought new. She asked me to look at this since the quoted $1500 repair was about half what the car is worth. He gave her the car last year and she loves it. She has a 2015 Mercedes and likes the E300 better.