Thanks Rod and DOC for the taking the time to look and the extensive explanation.
That helps alot!
That ties in perfectly with what Arthur D said about the workings of the AIR pump vacuum system in a separate thread. Apparently the whole system works in conjunction and is why I have a stored AIR pump fault code that won't go away.
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi
Last edited by pmizell; 12-20-2002 at 06:54 PM.