[QUOTE=dieseleverythin;3413753] Have you seen this thread http://www.peachparts.com/shopforum/tech-help/180544-asd-problem-94-e300d.html?

Sorry to drop out of this discussion for a while. Lost my job as a result of a major RIF at my company just after sending the original query and had a whole bunch of loose ends to tie up. Just getting my life back to a bit of normalcy, though without a similar job yet, and at my age, probably not ever. Looks like I'll have plenty of time to look after the car!
Thanks for the referral to the thread. I did see it, having combed the archives for ASD details. One solution for me to try, other than the very righteous leathermang's concern for the adherence to all speed laws to protect the general safety, will be to pull the sensors and see if they need cleaning. Based on the system's design, I doubt the ASD will engage at 80, but it was disconcerting the first couple of times the warning light came on at highway speeds. It has come on at speeds under 20mph when conditions are snowy or icy. The lower dash trouble light for ASD comes on when the key is in the first position, but never at any other time.
leathermang: Firstly, I didn't say I was driving in Jersey. I spend a lot of time in Vermont and if you don't drive around 80mph anywhere on I-89, you're being passed by old farm pickups or Toyota Corollas with elderly women drivers. Secondly, while the speed limit maxes out at 65 in NJ, anyone who has driven on the NJ Turnpike can tell you the defacto speed limit is around 75 or 80 along stretches where the roadway has six lanes in each direction. And how I drive is basically my business and, until you're a NJ state trooper, not yours. I'll determine whether and where it's safe to drive at 80, or more, based on my 50 years of driving experience.