I got in my 2010 SRX today and the DIC said "No Remote Detected". I took the remote out of my pocket and it still said that. I pushed the Start button and just a click. Tried several more times and the same thing. No radio, no interior lighting, nothing....including OnStar. I called the local Caddy dealer and they sent someone over and jump started it. I drove it to the dealership and they did a full diagnostic on it and couldn't find anything! At first I thought it was going to be the battery but it checked out fine along with every thing.
I know this car is several computers on a network on wheels but I find this type of thing scary. The dealer service people told me they had seen this type of thing before but were at a loss as to what was going on. Clearly there is some sort of software glitch(es) to be ironed out.