Eric
use the correct bearing. It is a FAG 20208
I went to a local bearing shop and the guy had the old catalogues from 1967.
SKF did not make the bearings that year. FAG were the people.
The MB part numbers were in the catalogue
From the EPC .... A000 981 05 06 ...BARREL TYPE BEARING RIGHT REAR
Try Caliber Motors they sold me mine ... was a lot cheaper than in Aus.
Al
The company I used installed my old RHS rear self aligning bearing in a 190sl axle they were rebuilding.
Bob Smith (Brisbane,Australia)
RHD,1967 early 250 SL, auto