Check your vacuum lines. The big fat main line goes from the pump to the brake master cylinder with the vacuum controls for doors, climate control, and shut off branching off that main line. Probably broke a connection somewhere. Tape it up to get things going. Do you still have power brakes?

Don't see how you can get into the trunk without a trunk key.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13