Well, actually it DOES matter who made the thermostat -- I played this game with my Audi Fox. Took forever to find one that fit properly (finally ended up at a part store that knew what there were doing). Quality of the NAPA and whatever other store I tried was fine, but the design was wrong. The NAPA had a bypass hole in it and no back "flap" to close the buypass system off, so it ran cold when the weather was cool and overheated once the outside temp came up.

The other one had a back flap too small, so it still overheated easily.

Behr and Whaler are the OEM suppliers, so you know they will fit correctly. Get is from FASTLANE or an independent MB shop, they will have the correct ones.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!