Remove/install master brake cylinder - AR42.10-P-0300T

MODEL 211, 219 with Adaptive Brake (ABR) 

Fig 1: Identifying Master Brake Cylinder Components (1 Of 2)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Identifying Master Brake Cylinder Components (2 Of 2)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

MODIFICATION NOTES

5.8.10

"Perform brake test on test bench" reference changed

Test sequence augmented/revised

	Remove/install
	Risk of poisoning  caused by swallowing brake fluid. Risk of injury  caused by brake fluid coming into contact with skin and eyes.	Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.	AS42.50-Z-0001-01A
	Notes on externally invisible brake fluid loss		AH42.10-P-9406-02V
	Notes on repairs to brake system		AH42.00-P-0003-01A
	Brake fluid notes		AH42.50-P-0001-01A
	Notes on self-locking nuts and bolts	All models	AH00.00-N-0001-01A
1	Operate the brake pedal several times when the engine is switched off	In order to reduce the vacuum in the brake booster (5).
2	Remove reservoir (1) for brake fluid		AR42.10-P-0301TA
3	Mark brake lines (2) relative to corresponding connection on master brake cylinder (3)
4	Detach brake lines (2) from master brake cylinder (3)	Seal brake lines (2) and connections on master brake cylinder (3) immediately in order to prevent the ingress of foreign objects. Collect escaping brake fluid with absorbent rags, as otherwise the vehicle paint may be damaged.
			Figure
			Fig 4
			Figure
5	Pry off cable tie (3k) with electrical wiring harness from master brake cylinder (3)	Do not open cable tie (3k).
6	Open holder (4h), remove line (4) and place down at one side
7	Unscrew nuts (3m) and pull master brake cylinder (3) out of brake booster (5)	Collect escaping brake fluid with absorbent rags, as otherwise the vehicle paint may be damaged. To prevent any brake system damage and malfunctions, foreign objects or fluids must not enter the brake booster (5)! Installation:  Replace O-ring (3a).
			*BA42.10-P-1001-05J
8	Install in the reverse order
9	Bleed brake system		AR42.10-P-0010T
	Checking
10	Carry out brake test on the test stand		AP42.00-P-4290BA

MASTER BRAKE CYLINDER

Number	Designation		Model 211 with ABR [Adaptive Brake]	Model 219 with ABR
BA42.10-P-1001-05J	Nut, brake master cylinder to brake booster	Nm	25	25

Fig 3: Identifying Box Wrench Bit (000 589 75 03 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Identifying Torque Wrench (001 589 87 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 5: Identifying Set Of Stop Plugs (129 589 00 91 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.