What I meant by "secret", is that they don't seem to broadcast it. They were asking for $1300+ from me at an MB dealer, until I found out on one of these threads that there was a service bulletin on it, and that MB had extended the warranty to 100,000 miles on this item. I confronted the MB dealer about this bulletin and extended warranty. As a result, they said they would look into it and call MB (whatever that means), and after a day or so, the dealer said that MB had approved the repair under warranty. I've been in Florida for the last couple years, so I'm not sure if the heat contibuted to the wiring harness problem.
The improvement in overall acceleration etc, was noticeable by both me and my wife. I was the second owner and bought the car with 40,000 miles on it. Unrelated, I also put a superchip (Orlando company) in it, about a year prior to the repair. I would also recommend the chip if you interested in stronger acceleration. Also, this car chews up pirelli P6000 sport veloce's so I have changed to Michelin Pilots (special order from costco). The Pirellis were separating on the inside after less than a year. I do like to use the acceleration, but they shouldn't disintegrate.
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