Brake test - AP42.00-P-4290BA

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MODEL 117, 124, 129, 140, 156, 163, 164, 166, 168, 169, 170, 171, 172, 176, 190, 197, 199, 202, 203, 204, 205, 207, 208, 209, 210, 211, 212, 215, 216, 217, 218, 219, 220, 221, 222, 230, 231, 240, 242, 245 (except 245.286), 246, 251

	General brake test (Only applies for countries without a specified brake test on the brake test stand)
1	Check braking behavior of service brake when driving	It must be ensured that the brake test when driving is performed as per the country-specific legislation and regulations. Otherwise, people may be injured or there may be damage to material and the environment! Press brake pedal uniformly. With braking deceleration fluctuations or pulsating brake pedal: ↓ Determine and rectify cause subject to separate repair order. With a difference in the service brake performance on the wheels on a single axle: ↓ Check/correct tire pressure subject to separate repair order. If the service brake performance difference remains even after repeat brake test on the wheels on a single axle: ↓ Determine and rectify cause subject to separate repair order. The locking limit was not reached: ↓ Subject to a separate repair order, check whether the brake values still comply with the legal regulations. The specified minimum requirements and tolerance limits for the brake system must be fulfilled on a vehicle-specific basis in accordance with the country-specific legislation. If this is not the case: ↓ Repair any complaints subject to separate repair order after performing diagnosis with the appropriate findings.
2	Check braking characteristics for parking brake when driving at ≤4 km/h (≤2.5 mph)	It must be ensured that the brake test when driving is performed as per the country-specific legislation and regulations. Otherwise, people may be injured or there may be damage to material and the environment! Electrically operated parking brakes are only active as from a speed of ≤4 km/h (≤2.5 mph). The locking limit was not reached: ↓ Subject to a separate repair order, check whether the brake values still comply with the legal regulations. The specified minimum requirements and tolerance limits for the brake system must be fulfilled on a vehicle-specific basis in accordance with the country-specific legislation. If this is not the case: ↓ Repair any complaints subject to separate repair order after performing diagnosis with the appropriate findings.
	Brake test on brake test stand
	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 OFF switch to shut down test stand.	AS42.00-Z-0001-01A
3.1	Set service valve or electrical selection switch in engine compartment to "TEST" position	MODEL 124.226/230/290/330/333/393 Ignition must be switched off.
3.2	Switch on dynamometer test using steering wheel buttons	MODEL 197
	Switch on dynamometer test using steering wheel buttons	MODEL 197.3/4 Do not switch off ESP® using the ESP Sport Off button on the center console. Otherwise an active brake intervention may result in the Electronic Stability Program (ESP®) suffering measurement errors.	AR54.30-P-1000-02QQ
4	Attach pedal force meter to brake pedal	For brake test on brake test stand as per EU Directive 2010/48/EU for vehicles with initial registration as from 28.7.2010.
	Service information: Brake test on roller dynamometer as part of HU 29 StVZO	MODEL 164.1/8, 166.0, 169.0/3, 171.4, 172.4, 203.7, 204.0/2/3/9, 207.3/4, 212.0/2, 216.3, 218.3, 219.3, 221.0/1, 230.4, 231.4, 245.2 (except 245.286), 246.2, 251.1 No service scope.	SI42.00-P-0007A
5	Move vehicle with front axle into roller brake test stand	Roller brake test stand for passenger cars
6	Move automatic transmission to selector lever position "N" or shift manual transmission to neutral
7	Determine and document the braking characteristic and brake values of the front axle	With MODEL 164, 166, 251 the brake test for each axle must not last longer than ≈ 10 seconds. The drive train and/or brake system will otherwise be damaged. Press brake pedal uniformly. The maximum value prior to the wheels locking up is to be documented.
8	Move vehicle with rear axle into roller brake test stand	Roller brake test stand for passenger cars.
9	Move automatic transmission to selector lever position "N" or shift manual transmission to neutral
10	Determine and document braking response and brake values of rear axle	With MODEL 164, 166, 251 the brake test for each axle must not last longer than ≈ 10 seconds. The drive train and/or brake system will otherwise be damaged. Press brake pedal uniformly. The maximum value prior to the wheels locking up is to be documented.
11.1	Determine and document braking response, brake values and actuating travel of parking brake	Vehicles with mechanically actuated parking brake Operate parking brake uniformly. The maximum values prior to the wheels locking up are to be documented.
11.2	Determine and document braking characteristics and brake values for electric parking brake	MODEL 197, 216, 221 Vehicles with electrically-operated parking brake Before operating the electric parking brake, the rear-axle wheel-and-tire assemblies must be driven for at least 10 s by the roller brake test stand so that application of the brake shoes is slowed up. Otherwise damage may occur. Briefly press switch of electric parking brake once, do not hold. Otherwise damage will occur. The maximum value prior to the wheels locking up is to be documented.
11.3	Determine and document braking characteristics and brake values for electric parking brake	MODEL 117, 156, 166, 172, 176, 190, 205, 217, 222, 231, 242, 246 Vehicles with electrically-operated parking brake Before operating the electric parking brake, the rear-axle wheel-and-tire assemblies must be driven for at least 10 s by the roller brake test stand so that application of the brake shoes is slowed up. Otherwise damage may occur. The electric parking brake brakes briefly and then changes to the roller brake test stand mode. 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 3rd and a 4th time until the wheels lockup. The maximum value prior to the wheels locking up is to be documented.
12	Release parking brake and drive vehicle out of roller brake test stand
13	Evaluate braking response and documented brake values of service brake
	Notes on the evaluating and interpreting brake tests on test stands		AH42.00-P-0004-01A
		With brake value fluctuations or pulsating brake pedal: ↓ Determine and rectify cause subject to separate repair order. If the difference in the braking effect of the service brake at the wheels of an axle is more than 25 % of the highest value: ↓ Check/correct tire pressure subject to separate repair order. ↓ Repeat the brake test on a test stand, subject to a separate repair order. If the difference in the braking effect of the service brake is still outside the tolerance during the repeated brake test: ↓ Determine and rectify cause subject to separate repair order. The locking limit was not reached: ↓ Subject to a separate repair order, check whether the brake values still comply with the legal regulations. The stated deviation applies for the Federal Republic of Germany; differently phrased country-specific regulations must be observed accordingly.
14.1	Evaluate braking response and documented brake values of parking brake	Vehicles with mechanically actuated parking brake With brake value fluctuations or pulsating actuation: ↓ Determine and rectify cause, subject to separate repair order. If the difference in the braking effect of the parking brake at the wheels of an axle is more than 50 % of the highest value: ↓ Bed in the parking brake as per the specifications, subject to a separate repair order.
		Except MODEL 197, 216, 221	AP42.20-P-4290-01BA
		MODEL 129 with duo servo brake	*BE42.20-P-1005-01A
		MODEL 124, 140, 163, 164, 202, 203, 204, 207, 208, 209, 210, 211, 212, 215, 218, 219, 220, 230, 240, 251	*BE42.20-P-1001-02A
		MODEL 168, 169, 170, 171, 199, 245	*BE42.20-P-1002-02A
14.2	Evaluate braking response and documented brake values of parking brake	MODEL 197, 216, 221 Vehicles with electrically-operated parking brake For brake value fluctuations: ↓ Condition parking brake, in accordance with specifications, subject to separate repair order
		MODEL 216 MODEL 221.0/1	AR42.20-P-0530-02SX
		MODEL 197 Repeat the brake test on a test stand, subject to a separate repair order. If the difference in parking brake efficiency during the repeated brake test is still out of tolerance: ↓ Determine and rectify cause, subject to separate repair order. If the difference in the braking effect of the parking brake at the wheels of an axle is more than 50 % of the highest value: ↓ Determine and rectify cause, subject to separate repair order. The locking limit was not reached: ↓ Subject to a separate repair order, check whether the brake values still comply with the legal regulations. The stated deviation applies for the Federal Republic of Germany; differently phrased country-specific regulations must be observed accordingly.	AR42.20-P-0530-02RQ
14.3	Evaluate braking response and documented brake values of parking brake	MODEL 117, 156, 166, 172, 176, 190, 205, 217, 222, 231, 242, 246 Vehicles with electrically-operated parking brake For brake value fluctuations: ↓ Repeat brake test on dynamometer subject to separate repair order. If the difference in parking brake efficiency during the repeated brake test is still out of tolerance: ↓ Determine and rectify cause, subject to separate repair order. If the difference in the braking effect of the parking brake at the wheels of an axle is more than 50 % of the highest value: ↓ Determine and rectify cause, subject to separate repair order. The locking limit was not reached: ↓ Subject to a separate repair order, check whether the brake values still comply with the legal regulations. The stated deviation applies for the Federal Republic of Germany; differently phrased country-specific regulations must be observed accordingly.
15.1	Set service valve or electrical selection switch in engine compartment to "Function" position	MODEL 124.226/230/290/330/333/393 Ignition must be switched off.
15.2	Switch off dynamometer test via steering wheel buttons	MODEL 197
	Switch off dynamometer test via steering wheel buttons	MODEL 197.3/4	AR54.30-P-1000-02QQ

ADJUSTMENT VALUES FOR PARKING BRAKE DURING MAINTENANCE OPERATIONS

Number	Designation		MODEL 124, 140, 163, 164, 202, 203, 204, 207, 208, 209, 210, 211, 212, 215, 218, 219, 220, 230, 240, 251
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

ADJUSTMENT VALUES FOR PARKING BRAKE DURING MAINTENANCE OPERATIONS

Number	Designation		MODEL 168, 169, 170, 171, 199, 245
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	5

TEST VALUES FOR PARKING BRAKE

Number	Designation	MODEL 129 up to 9/30/89 with duo servo brake	MODEL 129 as of 10/1/89 with duo servo brake
BE42.20-P-1005-01A	Number of notches at which the parking brake must be adjusted if up to that point there is insufficient braking effect	4	5