[tremblecolin]

I hadn't realised it reverts to 'on' when the ignition is turned on. All I can say it is a very seamless transition when to resume to drive.
So thanks Number6 for education lesson. On reflection it's probably a difficult job to permanently switch off.
So I'm happy to things as is and read the manual before asking silly questions.

Easy to switch off permanently using either vcds or obdeleven. I just push the button every time I start the car so I can activate it if I know I'll be stationary for a while.

Until a few years ago you used to be able to code the function to remember the last setting but the vw group has removed that option.