Steve: Sorry to hear about your problems. Here's an update to my original post when I pulled those codes.

Now have 118,000+ miles and the CEL has not returned. I didn't do anything else but reset CEL and re-fueled. Suspected plug wires but still using original ones and have not yet checked resistances yet.

Also decided to fight MB later on the cat recall. Found a shop who welded the cat seam for $50. Fortunately, the crack was completely visible and had not traveled to the "non-visible" side (somehow, using the word invisible side didn't sound right). The indy shop manager said clearly looked like poor workmanship or machine improperly set.

Good luck.

__________________
Jim