Ok update to the above. I had the audio and DIS controls working, which if that is all you need then stick with the above.
My MFSW had ACC buttons which flagged an error in the engine ecu and had no response in measured values when pressing the buttons so I obtained the normal cruise buttons (7E0 959 442 ICX red illumination as I thought the protocol may be different between the two types) and plugged them in, no good the normal cruise buttons had a similar error in engine ecu so still the same......Geerrr.
I played around with the coding but all info on google would not get the left buttons to work (the left volume control works with the right audio and DIS selection controls.
All the buttons suddenly stopped working after my fiddling so I thought I wonder if LIN connection 1 has been activated on pin 36 plug T73b white plug, I have been playing around with this for a few days, sent emails to the big converter companies but understandably no response even offered to pay for the info, anyway plodded on and as I left the wire plugged into 36 I disconnected the wire from the 17 wire and connected it to 36 again BINGO, all buttons now work.
I have now managed to get my cruise working on my MFSW retrofit.
I plugged the ACC buttons back in, the driver display shows the cruise has been selected, but it has an exclamation mark by it, plugging in the normal cruise buttons, the exclamation mark is gone and the speed can be selected. YIPPPPEEEE!!!!!
So at a later date I MAY consider going further and getting ACC to work which involves a different ABS unit with three pressure sensors built in, the standard unit only has one, and adding the wiring to allow the mode selection via a CAN switching relay (the front camera is the same but would need to be released via software to work) but for now just happy I got the cruise to work.
Coding can be done on ODIS or VCDS I have both. People who say the engine ecu can’t be coded with VCDS or Odis are wrong, both can be done but you need to know how to do it manually but that’s a different story.
Happy Dayz