Transmission suddenly had no power, as if it were in neutral, when attempting to accelerate from a stop. This is the most expensive car I've owned, and the first one to have a mechanical failure under warranty--especially at such low mileage. Dealer said that this isn't an isolated incident, and that they've had three new cars with axle seal leaks in a week. I also reported to NHTSA, as sudden loss of acceleration could lead to rear-end collision.