I have had both a w124 and a w210 wagon and I would suggest the w210. Steer clear of a w210 that has spent its life in the rust belt and you should be ok, also 4matics have stronger spring perches from what I have heard. I loved my 95 e320 wagon but they do have a lot of expensive potential problems such as head gasket failure and evaporator core leaks.

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tgmiller77
1997 Land Rover Discovery 158,000
1995 E320 Wagon 132,000mi
1999 E320 Wagon 97,000mi