In Controller 09, Central Electrics, in Coding/Long Coding Helper, Byte26, Bit 7, there is a tick box for "Enabling Stop/Start Functions" so I removed the tick and the coding was accepted.
It couldn't be that simple; could it? Sadly no; on a test drive and once the engine was up the the correct temperature Stop/Start still worked. Borrocks.
I tried that too some time ago, with the same result. A number of other things didn’t work either. Next time I’m in the mood, I’ll have a look at Yeti-Japan‘s suggestion again although, like you Bryetian, I have shied away from that route in the past