While you are studying the problem this weekend, swap out the number 1 plug with one of the others to see if the number 1 plug is still fouled. Or simply put a new number 1 plug in. Might help isolate the problem.
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Mark Stetson
1995 E320 Wagon Moonstone Grey/Parchment 106K mi.
2007 E63 AMG Graphite/designo 75K mi
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