Hi,

since this morning my Check Engine light is on when headlights are turned on (low beam / high beam), the warning light goes off again when I turn off the headlights. I cannot figure out why turning on/off the headlights has something to do with "Check Engine". I'd appreciate all suggestions, thanks!

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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