After approaching the "wiring harness, SAM reprogramming" part of the job with some trepidation, I wanted to share my success in finally retrofitting the factory trailer hitch removed from my 2009 ML350 4Matic (gasoline), to my 2011 ML350 Bluetec (diesel).

You can follow all the fun, including harness and SAM part numbers and procedure numbers and all that, and see how I modified my old SAM harness, in my YouTube video, at this URL...

https://youtu.be/r-QgedumoqY

Keep up the good work PeachParts, couldn't keep the four Benzes and a Boxster on the road without you.