I took a snippet from the log below. Note, it needed a tow truck, they replaced the battery & drive unit which requires the rear subframe removal. Now either the battery is not easily replaced contrary to reports of battery quick change from tesla, or the "drive unit" is more than a simple motor controller. In any case, even if it is just the dealer cannot fix a water leak, lemon laws apply. Here it has left them stranded, which certainly qualifies for lemon law. While I agree the tesla is a hoot to drive (a friend did test drive one) I don't know if I would run to buy a tesla because my mercedes is unreliable. It appears the tesla could be more unreliable. The drive unit is only one of many problems they are having.
From Edmund's...
When we last left our 2013 Tesla Model S, it was on the back of a flat-bed tow truck, having died on my colleague, Matt Jones. It spent the night in a tow yard and was delivered to the Tesla service department in West Los Angeles the following morning. ...
He called back about an hour later and said they would be replacing the drive unit and the high-voltage battery assembly. I asked Vince what caused the problems, but he said they don't open up the batteries at the service center. Like most warranty issues on new cars, the parts are replaced at the dealer and the old ones are sent to corporate headquarters for the engineers to study and see what went wrong. The service invoice didn't give me much more to go on, "During vehicle logs review, found fault related to internal drive unit failure. Replaced complete drive unit assembly per TDS case #9571."
If you're keeping score, our Model S is now on its third drive unit: the one that came with the car, the one that was replaced in November, and this latest one. And that wasn't the only thing that was replaced on this service visit.
After the power unit was replaced, the Model S needed a four-wheel alignment. That's because the rear subframe must be removed to extract the power unit.