Hello Allen,
Mercedes sedans of the early 60s to the mid 70s share some Pagoda parts. Things like wheel covers, wheels, steering wheels, interior handles and knobs most suspension and engine parts will change over on a lot of models. Specifically the Mercecdes "Finback" sedans, the Mercedes W108 chasis sedans and the common W114 chasis sedan share some parts. and mechanical systems. Pete Lesler has a parts intecange list, that he handed out at the last tech session.
As far as differentials, The W108 sedans and W111 sedans (finbacks) shared the early swing axle differential. Early cars had drum brakes in the rear as did the pagoda models. 4.08, 3.96, 3.75, 3.69 (non US cars), 3.47 (scarse), 3.27.
The 3.47 and 3.27 were both from W108 V-8 sedans and will interchange easily. Differentials from air suspension Mercedes will not change over.
Joe Alexander
Blacklick, Ohio
