Update. I was in Chicago for a long weekend, so the car had plenty of time to dry out. I'm back in Dallas today and started the car up when I got home. Same error code and running rough. I relocated the coil to position #2 and am getting P0302 now, so it *seems* that the problem followed the coil.

I'm inclined to order a coil, but am still a bit hesitant. Wouldn't a faulty coil throw a code for both cylinders 1 and 2?

__________________
08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280