Investigation underway...
I had a phone call from federal NHSTA investigator today. It was a 202 area code... assumed it was coming from Washington, DC.
The gentleman was very pleasant and interviewed me for about 15 minutes via phone regarding my recent alt failure (which I'd reported via their web site). Some of the questions:
1) confirming information... name, phone, address, VIN number, etc.
2) under what conditions did the failure occur? (in my case, it was at 40 mph, at night, on a 4-lane with moderately heavy traffic)
3) what were the symptoms? (for me, loss of power and electrical and computer went into "limp mode" where I could barely manage to get the car off the busy trafficway)
4) any prior indications? (for me, 1 day and about 15 miles earlier, the battery and brake lights came on ... I was unable to get the vehicle in for service to have these warning lights checked out)
5) what eventually happened? (towed to dealer, and next day dealer replace alternator free of charge ... off warranty with around 40K miles)
I didn't ask alot of questions ... wanted to keep the call short as I was driving (the MO, of course!). I did get the sense that this investigation was serious and would be thorough. The interviewer seemed especially interested in safety/risk issues that I encountered during the failure (how busy was the road ... what lane was I in ... how long did it take me to get the vehicle out of traffic ... etc)
I've just passed 50K miles now on my 2003 SL. Other than this one problem, I've had no others and would highly recommend MO to others.