Just plug in the vacuum lines to the servo again and tie it in place on the fender. You've got a vacuum leak with it removed. Alternatively, there's a branch of the vacuum lines near the oil filter housing that goes to the climate control system. Disconnect that branch from the main line and plug the main line. But if you do that you wont be able to control the heat at all. If you plug the servo back in, you should at least get the default settings and stop the vacuum leak.

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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