Just done this today. In case anyone else is about to do it on the facelift - do not try to turn the actual bulb, it doesn't turn! There is a black ring collar around the base of the bulb - this turns anticlockwise to unlock the bulb.
The collar needs to be moved to the new bulb - press firmly on both open ends of the collar and push, the collar should slide off the bulb - refit in reverse on new bulb.