Open the ashtray. Unscrew the two screws at the bottom of the ashtray. Pull it out gently, being careful not to cut or scratch the material on either side of it. The little storage tray below the ashtray should now lift out. Slide the wood trim piece forward, and it will come out of its sockets. Now you just have to remove the various switches and you are set.
1976 300D (W115) - 330K and still going (sort of)
1991 300D 2.5 Turbo - Sold at 221K
1983 280SEL - Sold at 206K
1981 300SD - Sold at 232K