So my hunch was right, that the all-day cold rain yesterday unveiled a problem. Codes PO300 and PO302 were found, misfires for cyl#2, fuel pressure ok at 3.0-3.5 bar. The tech notes say "severe carbon tracking found on spark plugs and resistor tips." There must have been some corrosion or open point somewhere allowing moisture in. They charged me for plugs and labor, and as the car was nearly undriveable, I wasn't going to take it home and fool with it today myself. Resisitor tips were covered under warranty. Now, the plugs should have been replaced at 60k service, which they did before I bought it, and if that is the case, I can't believe they went with 20k on them! Maybe bad resistor tips could kill them?