I appreciate the detailed info. I replaced the coil two or three years ago and it turned out the problem was something else. In spite of that, I left the new coil on and kept the old one. I'll put the old one back on and see what results.

Thanks again,

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Don
'85 500SL (Euro) - 186,000 w/a complete restoration and engine rebuild at 154,000
'95 C280 - 174,000