Why is my Audi A3's dashboard showing a warning sign?

I recently purchased a new Audi A3, but I noticed a warning sign on my dashboard. It's a triangle with an exclamation mark in the middle. What does it mean and how do I fix it?

The warning sign indicates an issue with your vehicle's traction control system. This could be caused by a fault in the system or low tire pressure. I recommend checking your tire pressure and if that doesn't resolve the issue, take your car to a certified Audi mechanic for a diagnosis.

According to Audi, the warning sign means you need to refill your AdBlue liquid which helps reduce emissions. Without refilling it, your vehicle may not start. I suggest getting a bottle of AdBlue and following the instructions in your owner's manual to refill it.

The warning sign can also indicate an issue with your brake system. Check your brake fluid level and if it's low, refill it with the specified type of brake fluid. If the light still persists, have your brakes checked by a professional as it could be a more serious issue.