Quote:
Originally Posted by Chuckl
...nothing and reset the ESP. BAM again. First dealer service was new brake switch and BAM again. Second visit was a replacement of the YAW Sensor. The sensor and switch cost over $1000. The yaw sensor apparently shorted out and sent the BAS a signal that the car was out of control and power was withdrawn and brakes applied to certain wheels to bring the truck back under control. I'm just thankful that I survived three abrupt panic stops without my foot on the brake caused by the failure of a component in the electronic stability system...
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This is really startling. I was under the impression that none of this new fancy crap (on all cars, not just MB) were DESIGNED and tested under "rule 0", in that no failure can cause loss of the normal operation of the car, even if that "normal operation" was coasting to a stop while having the brakes working, even with loss of power assist. If you look at the electronics in an MB (or any car of the 80's or up to the mid 90's) you can see that this is true, everything electronic has a "limp home" or "degraded performance" mode. IMHO, as soon as the mfr's strated violating rule 0, that's when the troubles began...I can hardly wait to see what things will be like with this new steering by wire crap 10 years from now. Or this automatic parking stuff gone mad or degraded from age and lack of maintenance.
When I was still working in engineering in the 90's, our shop was fairly close to UL headquarters in Northbrook. They were at the time mulling over the testing of software and systems for UL approval, and our UL guy was pretty respected over there. We came to the conclusion that it would be impossible to build something inherently safe unless it was designed from a blank piece of paper to have every failure mode run to a safe mode.