Loss of breaking efficiency. Your brakes begin to screech, grate or pulse when pressure is put on to the brake pedal.
The braking system on an SL107 consists of 4 disc brakes, 1 on each wheel. With time and use, these discs or rotors can become warped. When brake pads become too worn, they will make a grating or grinding noise whenever the brake pedal is applied.
Regular replacement brake pads is advisable.