997 Turbo rear parking volume

[pmandale]

Hi

Just bought myself a 2009 997 turbo with a glem 2 pcm, can anybody advise how I adjust the volume up on the rear parking and lights on warning?

Thanks in advance
PaulM

[Pope]

Tones for Park Assist may be adjustable in the instrument cluster via PIWIS tester (I know they are on Cayenne) but you can't make the 'lights on' warning any louder unfortunately