Rob,

I did mine, 1977 300D, about a month ago. It is a pretty straightforward job. If you have the Haynes Manual, the directions there are pretty good.

The key for me was to have some good penetrating oil and hit all of the fittings, nuts and bleeder valves and let them soak for a while prior to starting the job. My rear bleeder valves were especially hard to open, but penetrating oil and patience was the key. I also got a 9MM, I think, deep socket, which made opening up the bleeder valves much easier. Also, make sure that you have towels, covers and dropcloth, etc to ensure that you don't get any of the fluid on any paint as brake fluid will really mess up any painted surfaces. . Also, ensure that you replace any of the rubber grommets and gaskets, especially the one that seals the MC to the brake booster. Finally, get plenty of fresh DOT 4 and just replace the fluid while you're at it.

I also bench bled the master cylinder prior to installation. It was pretty simple and I didn't have a vice as the haynes manual called for. I just filled the reservior (sp), held the MC in my hand, had my son remove one of the plugs, i pushed in the plunger in and held it in, and had my son replace the plug, the let the plunger out, I repeated this about 2-3x per plug. I held the MC over a 5 gallon plastic pail with some plastic and newspapers under it to catch the BF as it came out.

What I would do the next time, is replace the reservior. The one in the car had a bunch of crud in it that was a pain to clean out (I just rinsed it out with new brake fluid). Doing it over, I would just replace it and start fresh.

Let me know if you want some more comprehensive directions, or send me a private message with your phone number if you wish to discuss.

Good luck,

JCD