We owned a Mercedes AMG C63 awhile back and it developed an engine miss. The local Mercedes dealer checked it and recommended a new $14,000 engine bay wiring harness. The next farther Mercedes dealer said it needed $28,000 worth of repair. A friend told us about this old guy who's pretty sharp with cars. He diagnosed & had it running perfectly in twenty minutes; for $80. The problem? a friend who I let use the car had it detailed and water went into the spark plug wells, shorting out several coil packs. The old guy had a couple of used ones on hand and in no time everything was good again.
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