@Haylands; had contact with Patrick from GAP. Unfortunately this mod is only possible for the 2017+ L405. So no option for me

Think I'm going to try the "Stan-modification" again (disconnecting the rear cubby battery or signal wire to capacitor). When I did this before I got once the "restricted performance" message. I'll be prepared  2013 L405 3.0 TdV6 Autobiography Barolo Black
2004 L322 3.0 Td6 Vogue Cairns Blue (gone)
2000 P38 2.5 DSE (gone)