What causes the central brake light fault in the Audi A4L to illuminate?

[Camilla]

Audi A4L central brake light fault illumination may be caused by insufficient brake fluid, damaged tail light bulbs, worn brake pads needing replacement, etc. Below are some explanations for why a car's brake light may illuminate: 1. Severely worn brake pads: Brake pads come in two types—those with sensor wires and those without. Pads with sensor wires will automatically complete a circuit when worn to their limit, triggering the fault light. Non-sensor pads don't provide an automatic warning but produce a metallic scraping sound to alert the driver that replacement is needed. 2. Low brake fluid level: Brake fluid plays a critical role in the vehicle's braking system. When the driver presses the brake pedal, the force is transmitted via the brake fluid from the master cylinder piston to the wheel's brake calipers, causing the brake pads to contact the wheels and stop the vehicle. Insufficient brake fluid may also result in noticeably reduced braking power or even complete brake failure in severe cases. This issue can be resolved by promptly replenishing the brake fluid.