Quote:
Originally posted by ML320Truck
Thanks for the information, but my realy question is why FSS can not reset itself after a fresh oil change? It should find out that the oil quality has changed so much that it should be good for another 10,000 miles. ANyway, I was just confused when I did an oil change on my ML with 3500 miles. I checked FSS and it indicated exactly the same number of miles before and after the oil change. And after driving a tank long, the FSS continued to decrease the number (7000->6700 or so).
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You're missing a big point here. The FSS is a Flexible SERVICE System. It's not only a oil change indicator system. So, simply changing the oil will not reset the FSS automatically to 10K. It will change the service interval some (it'll sence new oil and react). However, since FSS calls are not only for oil changes, it will not reset to 10K. As a matter of fact, the system very conservative and is designed to be set manually, that way all sub systems requiring a FSS service call are attended to. So even if you attend to all FSS sub-system calls, the system will not reset itself until you manually reset it.