The one that is to the right of the metal build plate on the radiator bracket as seen in the picture below. (as seen in the 15th picture in the series, here, scrolling down).

http://cgi.ebay.com/ebaymotors/1989-Mercedes-Benz-420SEL-MINT-CONDITION-NO-RESERVE_W0QQitemZ320237014548QQihZ011QQcategoryZ6331QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Thanks for any idea on how to get one. An overenthusiastic detailer killed mine and it's gone and I need another. (New, not from a Pick 'n' Pull yard)

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1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

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2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)