Centrider, that must have been terrifying and I am very glad it did not turn out worse. It may be hard for both of you to drive the car with confidence after that.

There have been some number of 'rug in a bunch' accelerations, but I have not heard of other (say, computer-related) causes. One might speculate about problems in the motor-driven throttle butterfly, but it will be most important to hear their final analysis of the problem, and what parts are replaced.

I would expect new brake hardware and tire on the 'fire side' and perhaps new brake fluid as well. All of that secondary to the cause, of course.

It is hard to forgive the 'never before' stance. Feel your pain there too. I understand that they have 'cover the a$$' legalistic reasons for lying (more or less) in response to your question. Certainly not trying to forgive them, but I guess I know why this would be the standard reply to such difficult questions.

Bob's rental of an NHW20 would certainly be helpful in understanding the 'rug in a bunch'. But not if there is some unique problem with your car. Good luck with this.

DAS

PS: I did not write a$$ initially but the nanny replaced my letters with ***. Interesting.