What does it mean that Audi a6l dashboard shows red exclamation mark ripple?

Audi a6l dashboard shows red exclamation mark ripple is the brake system fault light. When the brake system fault light is on, stop immediately for repair under any circumstances. The owner needs to first determine whether the handbrake is completely released. If the released handbrake is still there, check whether the brake oil level is normal or whether the brake pads are too thin. Audi a6l is a series of cars developed by FAW-Volkswagen Audi Company on the basis of the new a6 in Germany. The length, width and height of the car are 5036mm, 1874mm and 1466mm respectively, and the wheelbase is 3012 mm. Audi A6L engines all adopt in-cylinder direct injection technology, providing four fully upgraded gasoline engines: 2.0TFSI, 2.5FSI, 2.8FSI and 3.0TFSI.