Anything's possible. It sounds like an intermittent open or short circuit. Check all electrical connections. If the coils are the same, swap 'em and see if the problem follows the coil or not. It's possible that the coil is shorted or has a broken wire that only shows up with the contraction of the materials when cold. A poorly fitting ignition or coil supply wire could do the same thing.

Then you can get a heat gun and see which components need warming up.......

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition