2008 Mercedes Benz Truck R 320 CDI (251.122) V6-3.0L DSL Turbo (642.950) 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...
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