I dont believe they have an option to send all power to back wheels electronically but wont tell! I bet it has to be plugged in with start-scan or new proprietary computer controller to do it cause there is no way its a simple button combo code you can access in the car, otherwise someone would have figured it out by now lol!
Crazy thing is, I don't know why all vehicles don't have this option or at least an advanced computer system with feedback and interactive options??? Completely manual torque vectoring with live time stats, readouts and recording options for tuning with email built in!
Imagine being able to make a run at the track, record all the spark/fuel info into a database and then email that to your tuner from your cars computer (assuming built in wifi which exists). Then he could email you back and you'd have to verify/download the tune into the vehicle computer and load it up. Do a restart and you'd be off an running with a new corrected tune! This combined with drive-line customization on the fly is the future. Im talking completely manual and customizable tuning options on the fly with 3rd party interactive features, it would be awesome! The fact that you could record oit all and do it live would be legit, or you could even link your cars computer up live to tuner via a vpn client or something secured (no tune stealing now lol) so he could see runs live on his monitor and then make adjustments or whatever he may want to do to it