Had my 09 in for service today and got the instructions from them to activate/de-activate the DRL's. They said all 09's have the capability.
With the car off pull the headlight stalk back towards you as if you were flashing your bright lights and hit the lock button on your key remote at the same time. The istructions say you should hear and acoustic sound which I assume is a beep. To de-activate do the same thing but press the unlock button on the key remote. I could not get mine to work. The car was loaded with the latest software today to fix the gas gauge issue.
Someone want to try this on their 09 and see if it works. Only works on Smarts without the comfort package because of the autolamp feature.