While I couldn't find specific information on what "Mercedes Anal" refers to in the context of the event, I can provide some general insights into the XES Poland festival and its significance.

If you're interested in learning more about XES Poland or similar events, I recommend following reputable sources and event organizers on social media or their official websites. This will provide you with the most up-to-date information on the event, including the schedule, lineup, and activities.

Here's a long article on the topic: