While you're on FastLane, look for transmission shift rod bushings. Do a forum search as well for tips on installing them.

As for the shifter? I didn't think floor shift was available on US 108s. Maybe your car is a Euro or maybe it was converted. My dad's 300SEL 3.5 was converted from column shift to floor shift before he got it and there's no silver ring on the steering column.

Sixto
95 S420
91 300SE
87 300SDL
83 300SD