I was giving my MBz INDY friend a hand in trying to find out how to adjust this infamous "air flow meter potentiometer" and after reviewing what the MBz W126b CD manuals and finding the usual inadequately written and German-to-English translated confusion I then went to Google and searched on the word group [ "Cis-E" Mercedes 300SE potentiometer ]... and Vowalla!?... there were only 4 hits including the link to this THREAD.

The first link was: http://www.sg-motorsports.com/AFS%20Pot%20write-up.htm... and since this is an excellent step-by-step procedure for R&R and adjustment of this "pot"... I thought I would make this POST and share this info with all who venture here in the future.

I'll sign up for automatic e-mail notices for this THREAD and hopefully someone will come up with a source for this critical part of these CIS-E systems. Our subject MBz is a 1990 300SE.
Regards,