I realize this is over a year after you posted this, but the R8 does have a setting to power off automatically so you don't have to keep unplugging it.
Yeah not sure what's up with the error, maybe the modules are missing one of the options configured but Bimmercode still shows it? Not sure what's going on under the hood with the app, it might be working off a database instead of actually checking the module to see what's available to be...
Update: this seems to be caused by battery drain. I had my radar detector wired to power that did not turn on/ off with the ignition so it was staying on 24/7. Once I corrected the situation the passenger side comfort access behaves as expected.
Curious if anyone else has run into this:
For some reason comfort access (where you unlock the car by grabbing the door handle) seems to stop working on the passenger door overnight. It will always work on the drivers door, always unlocks when I hit the button on the fob, and if I use it on...
@djikigai Any chance you have the Bimmercode app and can check the values your car has? I'm curious if your model year (or maybe your region) has different defaults than others.