IIRC the 2011 uses D2R. Easiest way to tell is pull the bulb out of your headlight and look for any markings or text on the bulb's base for "D2R". If you can't see any text on the bulb, then look at the glass of the bulb for a shielded portion. If the glass is entirely clear, then it's likely D2S. If it has a shielded portion, then it's likely D2R.
I attached a picture of some of the more common OEM D2R bulbs from Philips, Koito, and Osram (left to right). In the pictures, you'll see that these bulbs are all conspicuously marked with "D2R" and they also show the shielding on the glass I referenced.