Yes, doors, fuel door and trunk have vacuum controls. They are all controlled via the yellow line in the engine compartment that goes thru the firewall. If you have none of those things, that yellow line is probably disconnected and plugged due to vacuum leaks in one or more of the control diaphragms in the doors or trunk.

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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