Looking to find what options are available for changing the differential on a W123....

What car models have interchangeable final-drive units to that of the W123...? Would those from say, the W124 series fit a W123?

What car models do you know that would fit?

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http://i190.photobucket.com/albums/z...0TDnoplate.jpg

Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....

W123 and pre-'86 W126 chassis. Both the W123 (300D) and W126 (SD) received a 2.88 ratio diff in 1985.

Those are probably hard to find in the UK, which is where the thread starter is.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

I've seen plenty of 2.47 ratio W126 gassers there which will work.

Those are there, but you said 2.88 ratio W123 and W126 diesels.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

I believe the OP is looking for what diff will fit the W123. I don't believe the question was location specific.

The W124 will not fit. Only early, 1st gen, W126 and W123 differentials will mount up.