Brake test - AP42.00-P-4290BA

WARNING: This page is about a different car, the 2011 Mercedes-Benz C300, 2010 Mercedes-Benz C300, 2009 Mercedes-Benz C300, and 2008 Mercedes-Benz C300. However, it is still accessible from the selected car via links, so may be relevant.

MODEL 124, 129, 140, 163, 164, 168, 169, 170, 171, 172, 197, 199, 202, 203, 204, 207, 208, 209, 210, 211, 212, 215, 216, 218, 219, 220, 221, 230, 240, 245, 251 (except, 245.286)

	Checking
	Risk of death caused by limbs being caught or crushed by rotating parts when performing tests on the brake test stand	Never leave the vehicle unattended on the rollers except in an emergency. Ensure that no one is under the vehicle or near rotating parts during testing. In case of emergency, use the EMERGENCY STOP switch to shut down test stand.	AS42.00-Z-0001-01A
1	Check/correct tire pressure and
2	Switch on dynamometer test via steering wheel buttons
3	Move vehicle with front axle into roller brake test stand	In the transmission roller dynamometer with the engine running, shift to the "N" or "neutral" position.
4	Determine brake values, control force and actuating travel on brake pedal for front axle and document	Press brake pedal uniformly. The maximum value prior to the wheels locking up is to be documented. The control force and actuating travel on the brake pedal are to be documented at maximum value. In the event of brake-fluid fluctuations or a pulsating brake pedal, determine the reason and rectify subject to separate repair order.
5	Move vehicle with rear axle into roller brake test stand	In the transmission roller dynamometer with the engine running, shift to the "N" or "neutral" position.
6	Determine brake values, control force and actuating travel on brake pedal for rear axle and document	Press brake pedal uniformly. The maximum value prior to the wheels locking up is to be documented. The control force and actuating travel on the brake pedal are to be documented at maximum value. In the event of brake-fluid fluctuations or a pulsating brake pedal, determine the reason and rectify subject to separate repair order.
7	Determine brake values, control force and actuating travel on parking brake for rear axle and document	Vehicles with manual parking brake Operate parking brake uniformly. The maximum value prior to the wheels locking up is to be documented. The control force and actuating travel on the parking brake are to be documented at maximum value.	*BE42.20-P-1001-02A
		In the case of fluctuations in brake value or a low maximum value: ↓
		If fluctuations in brake value or a pulsating parking brake cannot be eliminated by bedding in the brakes, determine the cause and rectify (subject to separate repair order).	AP42.20-P-4290-01BA
8	Determine brake values for electric parking brake and document	Vehicles with electric parking brake Before operating the electric parking brake, the rear-axle wheels must be driven for at least 10 s by the roller brake test stand. In order to prevent damage, thereupon the brake shoes make contact in a slow manner. Briefly press switch of electric parking brake once, do not hold. Otherwise damage will occur. After 2 to 5 s press the switch of the electric parking brake again briefly, the electric parking brake brakes with greater brake power. If necessary, after 2 to 5 s briefly press the switch of the electric parking brake a third and a fourth time until the wheels lockup The maximum value prior to the wheels locking up is to be documented.
9	Release parking brake and drive vehicle out of roller brake test stand
10	Set electric selection switch in engine compartment to "FUNCTION" position	Model 124.226/230/290/330/333/393
11	Switch off dynamometer test via steering wheel buttons
12	Evaluate documented brake values	If the specified minimum requirements and tolerance limits for the brake system scopes to be tested are not complied with, this must be rejected and rectified subject to separate repair order, after a conducted diagnosis and the corresponding findings.
	Notes on assessment and evaluation of brake tests on test stands		AH42.00-P-0004-01A

ADJUSTMENT VALUES FOR PARKING BRAKE DURING MAINTENANCE OPERATIONS

Number	Designation		Model 204
BE42.20-P-1001-02A	Number of notches by which the foot-operated parking brake has to be adjusted, if until then there is no adequate braking effect	Quantity	7
BE42.20-P-1002-02A	Number of notches by which the hand brake has to be adjusted, if until then there is no adequate braking effect	Quantity	-