MyPassport Wireless Pro: Any hack to auto turn on with USB power?

With all of the linux hacks that enable extra functionality and users learning more about how these devices work in more detail;

Does anyone know if there is a way to get the unit to auto turn on when connected to USB power?

(Sort of like the old PC BIOS setting, turn on when [mains] power restored).

Reason I ask is that mine is stored in the boot/trunk of my car as a media server and its a pain in the a*** to dig it out and turn on whenever I turn the car on. I only want it on when the car ignition is on so wiring it to the always on +12v wouldn’t be an option unfortunately.