On my old car, the Empeg was mounted quite high up on the dash (the ISO slot was there and it gave me a lot of satisfaction to have people salivating over the kewl visualizations when stuck in traffic) and I used to leave the empeg in the car while I was in the office carpark (extremely unlikely that someone would break in there as it was more protected than Fort Knox) and, during the summer, I realized that the empeg had a tendency to start on its own and sending a great deal of good auld music down the Alpine amps, which in turn depleted the battery (more than once) faster that you could say "Empeg gold, Cambridge tea" (LOL). IMHO the sun (very, very, very intense at that time of the year) was generating some nice IR interferences, instantly turning the poor empeg on. The install was done by a professional installer and cost me a fortune (OFC cables, amps, speakers, even external USB and gold plated RCA connectors, even for the AUX port), and the empeg worked flawlessly (to my great pleasure). Hijack (along with a million other things) was installed, can't remember the version though.

Cheers
Tony