When the car is moving while the engine is not running, or if the brake booster is defective, more pressure on the brake pedal is required to bring the car to a stop.
If this happens, ABS and PSM will also not operate.
Moisture or road salt on brakes affects braking. Brakes will dry after a few cautious brake applications.
Driving through water may reduce the traction.
Moisture on brakes from road water, car wash, or coating of road salt may affect braking efficiency.
Brake system warning light
Warning light USA
If the warning lights in the instrument panel and onboard computer stay on when the engine is running or come on while driving, the brake pads are worn excessively.
Brake pads and brake discs
The high-performance brake system is designed for optimal braking effect at all speeds and temperatures.
Certain speeds, braking forces and ambient conditions (such as temperature and humidity) therefore might cause "brake noises".
New brake pads or linings
The slightly reduced braking ability must be compensated for by pressing the brake pedal harder. This also applies whenever the brake pads and brake discs are replaced.