My 4matic went through two transfer-case re-seals by the time I sold it (around 110,000miles).

The bigger problem to me was the fact that the 4matic system is a reactive system, you have to slip for it to engage systems, and it had to drop out and slip periodically to know it was still on slippery pavement. Not a sure-footed system on snow and ice.

The best thing you can do is sell that thing and get a permanently-engaged AWD system like a quattro, you'll never go back to a reactive system. Even the Subaru systems are better than the 4matic, whether the early Styre-Puch system you have or the later viscous-coupled system.

JMO.

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Gone to the dark side

- Jeff