A while ago Audi issued a software update in order to save some of the energy used for lighting. Not long after, thousands of Audi owners said their lights wouldn't turn on. Mission accomplished?
"the lights go completely out when the vehicles are locked at the same time the parking lights are on.
That includes the side marker lights, parking lights, and the headlights. For a full list of the affected vehicles see this article on CarComplaints.com.