The rear section of the driveline should all be the same on the W123. It`s the front section that would be longer or shorter depending if the vehicle is a 240D with a manual trans, or auto. or a 300D with 5 cylinder and auto. or 5 cylinder and stick.
The difference in length is the center support and the transmission.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works