I have just recently bought a 1995 E320 wagon, Euro model, 39k on it. Very nice car and you should be able to expect very high mileage out of particulary the engine but the transmission as well. Somewhere in the neighborhood of 300-400 thousand miles, given basic maintenance is observed. Really a nice car to drive and easy to work on if you do it yourself. The engine is strong, especially in the upper rev ranges. The monowiper is streaky, if you can live with that.

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2002 Mercedes-Benz E320 4Matic
1995 Mercedes-Benz E320 Wagon
2005 Land Rover LR3 V8 SE
1999 Audi A8 4.2L quattro