| Thanks, faster, Tobias! Your answer makes me much more comfortable with this situation.
Same thing happened a week later ('course I'd let a service appointment earlier that day go unclaimed as the problem seemed to have resolved itself) and the service engine lamp never lit up until the following Saturday (about 36 hours later), whereupon it stayed lit until this past Monday morning.
Be interested to hear about whatever fix is conceived; I never had ANY problems with my R53 in the 5 winters I drove it (hard!) until the floor heater vents quit blowing heat when the temp was about -12 F one day last spring.... Then my 2007 arrived! | 
