Sorry, I should have been more specific:
The codes activating the check engine light were two O2 sensor codes, an airpump code, and misfiring code, some emergency mode code, a cam timing error, and another I can't now remember.
It seemes pretty clear to both of us that the errors reported couldn't possibly be current as the vehicle was simply running too well to be producing so many fault codes.
What is strange is that they disappeared after the car sat for 4 hours. Or is this normal: the codes take time to erase themseleves?
92 W140 500SEL
Joel P. Davis