Originally Posted by
onehundred80
This one is the SKREEM Mercedes part# 170 820 18 26
5099540AA
The expensive one although in the post above they are cheaper if you get a used one recoded.
5099541AA
This one goes in the door.
Then,as I understand it "NPB" plugged it in and didn't have to program it? Is anyone else as confused as I am? :-)