Thanks for the info. Partscarver. I appreciate the input but my car has 603 not a 617. The 'stat is in a different location on the 603. But the way it fits in the housing is probably the same. Can you verify this? Wouldn't the car overheat if the 'stat were in backwards?

Thanks again.

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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
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'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K