Remove/Install Stepped Tandem Master Brake Cylinder - AR42.10-P-0310GG

Model 460, 461 

Model 463 

up to model year 2019 

except code 979 (Special protection MB Guard) 

Courtesy of MERCEDES-BENZ USA

Shown on model 460, 461 

Fig 1: Stepped Tandem Master Brake Cylinder Components Location - Model 463 Up To Model Year 2019 Except Code 979; Shown On Model 460, 461

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of poisoning  from swallowing brake fluid. Risk of injury  from skin and eye contact with brake fluid	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 repairs to brake system		AH42.00-P-0003-01A
	Brake fluid notes		AH42.50-P-0001-01A
	Notes on externally invisible brake fluid loss		AH42.10-P-9406-02A
1	Switch off ignition
2	Push down brake pedal several times	In order to reduce the vacuum in the brake booster (16).
3	Remove brake fluid reservoir (10)	Model 460, 461 Model 463 up to model year 2013 except code 979 (Special protection MB Guard)	AR42.10-P-0301GG
		Model 463 as of model year 2013 up to model year 2019 except code 979 (Special protection MB Guard) Install new sealing rings (9).	AR42.10-P-0301GW
4	Detach expansion reservoir (30) of the differential lock operating mechanism from wheel well	Model 460, 461 (except 461.302/304/305/332/333/334/340/342/343/345/346/392) Loosen hose clamp (30a) and place expansion reservoir (30) to the side with line connected.
5	Unscrew brake lines (2, 3) from tandem master brake cylinder (1).	Brake pipe to master brake cylinder Brake pipe to master brake cylinder	*BA42.10-P-1003-04B
		Box wrench bit	Fig 3
		Torque wrench	Fig 2
6	Disconnect electrical connection from the traction system hydraulic unit (A7/3) and set aside Information on preventing damage to electronic components due to electrostatic discharge	Model 461.305/333/340/343/392	AH54.00-P-0001-01A
		Do not touch, deform or damage contacts of connector and jack! Do not allow any foreign objects, dirt fluids to enter the jack or connector! Otherwise it may cause damage or malfunction.
7	Detach tandem master brake cylinder (1) from brake booster (16).	Pull tandem master brake cylinder (1) out straight toward front. Otherwise, the push rod can be pushed out of its axial position and broken out of the retaining lugs on the controller. Always install new tandem master brake cylinder (1) if damaged. Replace seals (17) and nuts (19).
		Nut, master brake cylinder to brake booster Nut, brake master cylinder to brake booster	*BA42.10-P-1001-05B
8	Install in the reverse order
9	Bleed brake system	Model 460, 461 Model 463 (except 463.270/271) up to model year 2013 except code 979 (Special protection MB Guard)	AR42.10-P-0010GG
		Model 463 (except 463.270/271) as of model year 2013 up to model year 2019 except code 979 (Special protection MB Guard)	AR42.10-P-0010GW
		Model 463.270/271 up to model year 2019 except code 979 (Special protection MB Guard)	AR42.10-P-0010GX
	Check
10	Check brake system for leaks	Model 460, 461 Model 463 up to model year 2019 except code 979 (Special protection MB Guard)	AR42.10-P-0100-01A

Fig 2: Identifying Torque Wrench (001 589 75 21 00)

Courtesy of MERCEDES-BENZ USA

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

Courtesy of MERCEDES-BENZ USA