I hate to ask a bunch of questions at this time but when you are jumping the car by going directly to the starter what position was the pull knob on the dash?
With the new battery, do the glow plugs work?
Did you try to tow the unit and get it up to 35 mph or so and then put it in drive, once again with the glow plugs activated? I am having trouble believing the car ran before and fixing the brakes made the rest of the car fail. Sorry to hear of your frustration, and good luck, Jim
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)