I am looking at a 1991 300TE 4Matic with 140K miles on it.

It looks very clean but I have only seen it in pictures.

I'm trying to find out what kind of known issues this car has that I should look for.

How does the transmission tend to fare in this model?

Is the 4Matic in this model troublesome?

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1993 W124 300D
-297K on the clock as I type this.