Heh, that reminds me of my last rental, where, not half an hour off the lot, the touchscreen sound/navigation/??? system got stuck in some sort of reboot loop.

Heh, that reminds me of my last rental, where, not half an hour off the lot, the touchscreen sound/navigation/??? system got stuck in some sort of reboot loop. Cursory online research suggested the problem was a known firmware bug that was unfixable without a service appointment. A reasonable person would probably have turned around and exchanged the car with the rental company at this point. I am not a reasonable person. Instead, I headed directly to a truck stop and purchased a heavy-duty power inverter, dropped the back seat, and crammed my portable PA speaker into the trunk, connected to the car's trunk-mounted battery through the inverter and to my iPhone through a shielded audio cable run from the trunk to the front seat. The result sounded far better than it should have, and what it lacked in convenience (I had to pop the trunk to power it down) and channel separation (one speaker = mono), it more than made up for in dB SPL. (for the record, I've also repaired eBay purchases that arrived in worse-than-advertised condition rather than returning them, for no other reason than that learning how to fix things is more fun than going through the hassle of returning them)