I got my NT520 Pro and have started using it.

For transmission fluid temperature I'm using the path, from the top menu after scanning the VIN in the BMW section:

2. Control Units
1. Drive
10. EGS 6HP transmission control
5. Live data
1. Performance variables, gearbox: (checkbox) Oil temperature, gearbox [ I also checked Oil temperature, engine & Battery voltage ]
View Data [F3]

Does that sound right? Might be a little different from your menus, Andrew, or is there a different path to get Transmission oil, temperature, like you have?

I didn't update the unit yet.

There's also a 11. EGS 6HPTU transmission control menu choice, just below 10. EGS 6HP transmission control in the third step. Anybody know which is correct for an 04 N62? They seem to have the same choices available, at least for the live monitoring.