Re: Let's discuss '14+ CAN-BUS...
VW/Audis are lucky to have Ross Tech. He cracked it and VW has not seemed to worry about securing it since.
Some 3rd parties have "enhanced" interfaces but they still don't do what RossTech does.
I think only the Witech stuff does the type of stuff you are thinking of and is very expensive and I don't think any Joe can buy it.
I have the ross-tech stuff for my VW too.
You can read stats (temps etc), read error codes, and clear error codes with generic interfaces.
01-15-2015 Overland 3.6L Black W/Black Int, Advanced Technology Group, Zeigler Lifetime MaxCare (pending)
OEM: Mud Flaps, Matts, Cargo Liner, Cross Rails
Tires: OEM 20"/Nokian 18"