This is for a 2006 convertible but maybe the same:
New Beetle Convertible L5-2.5L (BPS) (2006) > Volkswagen Workshop Manuals > Transmission and Drivetrain > Actuators and Solenoids - Transmission and Drivetrain > Actuators and Solenoids - A/T > Pressure Regulating Solenoid, A/T > Component Information > Locations
workshop-manuals.com
There are some downloadable 09G service manuals online; that might be helpful as well:
DuckDuckGo. Privacy, Simplified.
duckduckgo.com
For factory VW service manuals; you might pay for one day of the eRWin, service manuals and download what you need there: (these are the manuals; that the VW dealer techs use):
erwin.vw.com
Lastly, using VCDS; viewing live data, can really help narrow down the problem:
Wiring problems, damaged plugs, terminals, wiring harness, sticking solenoids, broken gear selector assemblies and worn valve bodies, are all common issues we see with the 09G.