Remove/install left front brake line - AR42.10-P-0032MCU

MODEL 451.3/4 

Illustrated on model 451.40 

Fig 1: Identifying Left Front Brake Line Remove/Install Components - Illustrated On Model 451.40 (1 Of 2)

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Fig 2: Identifying Left Front Brake Line Remove/Install Components - Illustrated On Model 451.40 (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	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
	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 (8) to rear axle	Remove brake lines from hydraulic unit (8) to rear axle only as far as it takes for the bracket to be unscrewed.	AR42.10-P-0035MCU
2	Remove left front wheel		AR40.10-P-1100MCU
3	Unclip brake line (3) from the bracket (4)	Not on model 451.390/490
4	Loosen nuts (5), remove bolts (6) and remove bracket (7)	: Move guide pin (9) on the hydraulic unit (8) into the bracket (7).	*BA42.45-P-1008-01F
5	Support hydraulic unit (8) using transmission jack and removal fixture	Removal fixture	Fig 3
		Transmission jack
6	Check bolted connections of brake lines (10) with the hydraulic unit (8) for color coding	: Mark brake lines (10) accordingly.	AR42.10-P-0013-05MCC
7	Loosen bolted connections of brake lines (10) with the hydraulic unit (8) and separate	Collect brake fluid in a suitable container. Seal connections using suitable plugs.	*BA42.10-P-1010-04E
		: Use a 12 mm open-end wrench bit. Do not bend brake lines (10), pay ATTENTION to routing, leaktightness and clearance. If a brake line (10) with red color coding has been detached, this brake line (10) must be replaced. See: ↓ Remove/install brake line from the master brake cylinder to the ESP hydraulic unit	AR42.10-P-0034MCU
8	Lower the hydraulic unit (8) carefully until the brake line (1) is accessible
9	Unclip retaining clips (11), rpm sensor connector (L6/1x1) and electrical lines (12, 13) on brake line (1)
10	Check bolted connections of brake line (1) with the hydraulic unit (8) and the brake hose (14) for color coding	: Identify the brake line (1) accordingly.	AR42.10-P-0013-05MCC
11	Loosen bolted connections of the brake line (1) with the hydraulic unit (8) and the brake hose (14) 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.	*BA42.10-P-1002-04E
			*BA42.10-P-1010-04E
		Box wrench bit	Figure
		Socket wrench set	Fig 5
12	Remove brake line (1)
13	Replace brake line (1).	Only if the brake line (1) with the red color coding has been detached.
14	Install in the reverse order
15	Bleed brake system		AR42.10-P-0010MCU

BRAKE LINES, BRAKE HOSES

Number	Designation		Model 451.3/4
BA42.10-P-1002-04E	Brake pipe to brake hose	Nm	16
BA42.10-P-1010-04E	Brake line to ESP hydraulic unit	Nm	16

ELECTRONIC STABILITY PROGRAM (ESP)

Number	Designation		Model 451.3/4
BA42.45-P-1008-01F	Bolt, ESP hydraulic unit bracket to floor panel	Nm	25

Fig 3: Identifying Removal Assembly (450 589 02 62 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Box Wrench Bit (450 589 09 99 04)

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Fig 5: Identifying Socket Wrench Set (451 589 00 03 00)

Courtesy of MERCEDES-BENZ USA