Good evening! A question, has two error codes and an Audi A6 -2010 that does not start. It came on suddenly after changing the xenon bulb (accident?) anyone have any ideas about the below?

When a friend helped me read the error codes, there were a lot of communication errors. These do not come now. After some digging in the car, we now have 2 fault codes, a U111300 (function limitation due to received message, permanent) which cannot be deleted, and a P305300 (starter motor control, return measurement, short circuit to ground/interruption -permanent. The latter is deleted temporarily, but returns when I drive with the starter motor. It should be added that the starter motor does not make its own attempt to start when I release the key, without me must hold the key in the right position to run the start.All inputs are welcome!
//Daniel