My wife picked up a 97 E320, and she went to get it smogged the other day. They told her not all of the systems had cleared themselves. Possible the previous owners had replaced, disconnected the battery. She has since put several hundred miles on it with numerous key cycles. I scanned it with my OBD2 scanner and the secondary air system still hasnt cleared. There is no MIL (CEL) that pops up. Any help is greatly appreciated thanks.