The larger delivery hose that connects to the fuel pump screws into the fuel tank screen which screws into the fuel tank. Once this hose is off, you can loosen the fuel tank screen with either a 46mm socket(baumtools.com) or a Sears 1 13/16" socket. The Baum tool is very pricey, but has a short profile which allows better access.

Others here have reported success using a Craftsman 1 13/16" socket.

I suspect you'll have no porblems changing out any of this if it is indeed the way you have to go.

Hope it works out for you.

By the way, my situation was as follows:

Get in car and drive approx. 15 mi. on highway. Car starts bucking intermittently, then dies. This ALWAYS happened only when it was hot outside(high 80s or better). I would have to let the car sit for 45 mins to an hr. B4 it would start. The first time this happened it was close to dark back in late March. It had been especially warm that day and was hot on the way home(high 80s). I had to walk home - 3 miles after the stall. By the time I got back to the car, the outside temp had cooled and I started and drove the 3 mi. to my house and just as I pulled in the driveway, it died.

A few days later, a cold front(tail end of winter) blew in and the car was fine during this cool spell. A few days later, the warm-hot weather was back and so was the bucking/dying out after about 15 mi. of driving.

One one of the many occasions this occurred, I jumped the fuel pump relay pins in my MAS unit(pins 1 & 2) and the car would not start, so I knew it was not the MAS. I had replaced that the previous year.

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"