The driver describes the car shaking when braking at around 30 mph, and says the brake pedal sometimes becomes hard and unresponsive, especially on the motorway. A mechanic inspects the car, checks the brakes, takes it for a quick test drive, and finds the discs are worn with a lip and slightly warped, with a spongy pedal. He advises new brake pads and a brake fluid change, and recommends driving cautiously and locally until the work is done. Paperwork is completed and the driver leaves.