It is some type of sensor that attached to the mass airflow sensor. What does it do? Should it be replaced with the MAF?

__________________
2008 S550
2010 GLK350
1997 E420 (retired)
2005 CLK500 (retired)

'Looks like the Behr unit may be not available
(Is that what NLA means on FastLane?)

As to your other questions: I do not know,I'm a Diesel guy...the MAF on my MB
is un-necessary/disabled/gone...I went over to the "Dark Side" with a Pressure
Operated Wastegate...If the EDS(Computer) is setting codes ,it matters not.

Attached Thumbnails

 

__________________
'84 300SD sold
124.128

It's an air intake temperature sensor, don't have to replace it with the MAF but it is cheap, around $20.

If Fastlane doesn't list it try here:

http://www.trademotion.com/partlocator/index.cfm?action=searchCatalogOEM&siteid=214269

__________________
1988 California version 260E (W124)
Anthracite Grey/Palomino
Owned since new and still going strong and smooth
MBCA member

Past Mercedes-Benz:
1986 190E Baby Benz
1967 230 Inherited from mom when she downsized
1959 220S Introduced me to the joys of keepin' 'em goin'

There are only 10 kinds of people in the world--those who understand binary and those who don't