Interesting! Just wonder how did you come up with the trunk light as the source in the first place. It reminds me of the joke that the Scots would not buy refrigerator for being not sure if the light goes out when closed . No offense to the Scots intended.

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1996 E320 since 1/16/08, 171K miles as of Feb 2011

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1989 300CE - R.I.P. Dec 29 2007
Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE