Just to jump in here: About six months ago I replaced the MAF sensor with one from a local auto parts store - I assume it to be reman, though it does say Bosch on the side. I wouldn't know what it came out of originally.

Now Christy is pulling P0170 and P0173 again.

Could it really be the MAF sensor, again?

This, on my 99 W210.

__________________
DS
2010 CL550 - Heaven help me but it's beautiful
87 300D a labor of love
11 GLK 350 So far, so good
08 E350 4matic, Love it.
99 E320 too rusted, sold
87 260E Donated to Newgate School
www.Newgateschool.org - check it out.
12 Ford Escape, sold, forgotten
87 300D, sold, what a mistake
06 Passat 2.0T, PITA, sold

Las Vegas NV