Car bucking and nearly stalling at idle, driveable but underpowered. Scanner returns P0306 which I know is misfire on #6.

It is raining buckets here and I drove through a large puddle immediately before this happened. Other cars also pulled over after the puddle. But I have a hard time believing going through a puddle is somehow the cause for fouling cylinder #6 which is way back against the firewall. I would think MAF damage or cylinder #1 or #2 would be more likely.

In any event, I was able to nurse it home, so it's in the garage now. I'm gonna have to boot up my laptop and connect in to work before I get to it. I'll start by pulling and reseating the plug connector for #6.

QUESTION: If a coil failed, wouldn't it trip 2 cylinders? Also, isn't #6 under a coil connector? I know those frequently go bad. But these wires and connectors aren't very old, maybe 3 years old and 25K miles (I'd have to verify in my log).

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