Mercedes Benz Truck ML 63 AMG (164.177) V8-6.3L (156.980) Parking Brake System: Service and Repair

2010 Mercedes Benz Truck ML 63 AMG (164.177) V8-6.3L (156.980) Parking Brake System: Service and Repair AP42.20-P-4290-01BA Bed in parking brake according to instructions. When the parking brake is operated the catch of the pedal or hand-lever must not lock in position 1 Driving on dry road, initial speed approx. 50 km/h Operate the pedal or parking brake hand-lever 2 to 3 times with 100 to 200 N and brake the vehicle to a standstill. Since the brake lamps do not light up, particular attention must be paid to following traffic! 2 Driving on dry road at a constant speed of approx 50 km/h. Actuate the parking brake pedal or hand-lever with a force of max 100 N for 10 seconds. 3 Drive on the dynamometer or function test stand at a constant speed of 50 km/h (3rd gear). Actuate the parking brake pedal or hand-lever with a force of 100 N for 10 seconds. The specified force must not be exceeded. 4 On the brake test stand operate the pedal or parking brake hand-lever for approx. 2 minutes with a constant force of 150 to 200 N. Do not lock the parking brake pedal or hand-lever! When bedding in the brakes, heat causes the brake disc bowl to expand, reducing the operating forces. The bedding-in procedure can be repeated when the parking brake has cooled. 5 If the parking brake does not release satisfactorily after the test, or pulls to one side after bedding in the brakes and adjusting (maximum permissible deviation from higher value: 50%), check brake shoes and brake cables and replace if necessary. The German specifications specify a minimum retardation of 20% for the parking brake. The retardation is the ratio of the sum of the braking forces at the wheels to the gross weight. A maximum deviation of 50% from the higher value is permissible. The regulations for other countries should be observed in each case. -----------------------------------------------------Page 1-----------------------------------------------------