The 210 is a different system than the 124.
The 124 was designed and built by Steyr-Puch, was electro-hydraulic actuated clutches and gears, the 210 was viscous-locked differentials with traction control.

Although the Steyr-Puch system is technically very cool, it was more complex than it needed to be, IIRC it was a $23,000 option on my '91, and really caused me a lot of white-knuckle moments during electro-hydraulic indecision (which happens regularly by design). Still a really cool system from an Engineer's view. The 210 4matic was a less expensive car in '97(?) when introduced, than my '91.

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Gone to the dark side

- Jeff