I'm thinking of adding DRL to my 2011. I was looking at this. Truly LED Daytime Running Light Automatic Auto DRL On-Off Switch Relay Reading the instructions, I wonder if this will work since the engine will be turning off/on constantly. It says that it will turn on when the engine is on and this is directly connected to the battery. This of course presents another problem since the battery is in the back.
I'm pretty sure this is based on the same kit I picked up in Japan a few years ago, it works off vibrations. I had it on my S2k Should work.