Use auto hold button as Start/Stop with memory instead of no button and off possible?

[BeachBoy]

Simple answer is "Nope"
It's a whole LIN slave unit. Each button sends a different message. Besides, auto start / stop button has never been a physical button on VOLVOs. It's always been an option  on the main car functions screen.

You could however inject the drive mode command to switch to individual which can be set to remove start/stop

Or you can set the car to Police/VIP and there will be no more start stop at all.

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