Bolts are readily accessible. Most people have trouble because they can't access the back bolts because the seat is not in the fully forward and fully up position. Use the under seat lever and the side lever to accomplish fully forward/up. Sometimes it requires someone pushing from behind to get the fully up position.

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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