I had the 3 piece shaft for the 91 SDL shipped to driveshaft pros in garden grove CA and supplied all bearings/boots etc.



They rebuilt it/balanced it etc and shipped back.


Now I'm staring at it here and I can't decide which side is the front.


Front and rear shafts are the same length with same bumps for alignment.



The only clue I can find is in the manual where it indicates the centering sleeves protrude different lengths.


Mine look closer to 19mm and 24mm so would that make the shorter end the front?

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190D SOLD
2.5 non turbo
5 speed manual transmission
Build date: December 1985
W211 E320 CDI
W126 350SDL
X204 GLK 250 Sans Bluetec