Remove/install right front brake line - AR42.10-P-0033MCU

MODEL 451.3/4 with code 494 (US version)

Shown on model 451.40

Fig 1: Identifying Right Front Brake Line Remove/Install Components

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
	Brake fluid notes		AH42.50-P-0001-01A
	Notes on repairs to brake system		AH42.00-P-0003-01A
1	Remove brake lines from hydraulic unit (6) to rear axle	Remove brake lines from hydraulic unit (6) to rear axle only as far as it takes for the bracket (5) to be unscrewed.	AR42.10-P-0035MCU
2	Remove right front wheel		AR40.10-P-1100MCU
3	Remove front axle carrier support	Model 451.391/491 with code 494 (US version)	AR33.10-P-0002MEV
		Model 451.390/392/490/492 with code 494 (US version) with code V03 (Battery cooling system)	AR33.10-P-0002MEX
4	Remove screws/bolts on front axle carrier support	Model 451.390/392/490/492 with code 494 (US version) except code V03 (Battery cooling system)	AR33.10-P-0002MEX
5	Loosen nuts (3), unscrew screws/bolts (4) and remove bracket (5)	: Move the guide pin (7) on the hydraulic unit (6) into the bracket (5). Screw/bolt, ESP hydraulic unit bracket to floor panel	*BA42.45-P-1008-01F
6	Support hydraulic unit (6) using telescopic lifter and removal fixture 000 588 11 62 00 Major assembly mount		WS01.00-P-0092B
		Removal fixture	Figure
7	Check color coding of threaded connections of brake lines (8) to hydraulic unit (6)	: Mark the brake lines (8) accordingly.	AR42.10-P-0013-05MCC
8	Loosen and disconnect threaded connections of brake lines (8) to hydraulic unit (6)	Collect brake fluid in a suitable container. Seal connections using suitable plugs. : Use a 12 mm open-end wrench bit. Do not bend brake lines (8), pay attention to routing, leaktightness and clearance.	AR42.10-P-0034MCU
		Brake line to ESP hydraulic unit If a brake line (8) with red color coding has been loosened, this brake line (8) must be replaced. ↓ Replace brake line (8).	*BA42.10-P-1010-04E
			AR42.10-P-0034MCU
9	Lower the hydraulic unit (6) carefully until the brake line (1) is accessible
10	Unclip retaining clips (9) and rpm sensor connector (L6/2x1) from brake line (1) and unclip brake line (1) from brackets (10)
11	Check color coding of threaded connections of brake line (1) to the hydraulic unit (6) and the brake hose (11)	: Label brake line (1) accordingly.	AR42.10-P-0013-05MCC
12	Loosen threaded connections of the brake line (1) to the hydraulic unit (6) and the brake hose (11) and separate	Collect brake fluid in a suitable container. Seal connections using suitable plugs. : Do not bend brake line (1), pay attention to routing, leaktightness and clearance. Brake line to brake hose	*BA42.10-P-1002-04E
		Brake line to ESP hydraulic unit	*BA42.10-P-1010-04E
		Box wrench bit	Figure
		Socket wrench set	Figure
13	Remove vacuum line of brake booster	Model 451.390/392/490/492 with code 494 (US version)
14	Remove brake line (1)
15	Replace brake line (1).	Only if the brake line (1) with the red color coding has been detached.
16	Install in the reverse order
17	Bleed brake system		AR42.10-P-0010MCC