Gilly and Steve - thank you for your invaluable help! I ordered a new MAF and will install it when it comes in.

Steve: that tube I mentioned is at the front of the engine under the MB cover. There's a small diameter plastic tube there that has rubber 'boot/fitting' on each end - it sits vertically...well that
snapped, so i used duct tape to reattach it. It's about 4.5 inches long and about 1/8th inch od. What does this go to? (98 E430)

Gilly: Regarding code P0410, I started my car this morning and I heard SOMETHING start up, presuming it was the AIR pump, it sounded like a blower/fan kicked on then stopped after about 45 seconds. I forgot to check the fuse - will do that today.
By the way - where is the AIR pump? Left or right side? How much is the electric motor and can I replace it myself?

You guys are INVALUABLE!!