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That's excellent. I knew BMW thought it through very well. I just didn't know how they did it. So for the most part the backbone of the systems are conventional mechanical systems, that happen to be controlled by electronics. I particularly liked the part that says:
"If the engine is switched off, electromechanical brake cables support the function of the conventional handbrake."
Just to give you an idea about how anal I am about certain things. Back in the mid-1980's I purchased a new car with full electronic engine control. After parking it in my driveway I lifted the hood and disconnected a computer control plug to see if the thing would run with out it. A dashboard light came on, the idle was a little rough, but it ran OK. You could even drive it that way if you had to.
I put together computers back in those days and knew how unreliable they could be so it was reassuring to have that knowledge. I used to be that way about elevators, too, but after researching all the safety features, no problem.
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