Hydraulic brake system - replacing brake fluid - AP42.50-P-4280G

WARNING: This page does not describe the selected car, but rather 203 other vehicles, including the 2020 Mercedes-Benz SLC300, 2020 Mercedes-Benz SL550, 2020 Mercedes-Benz SL450, 2020 Mercedes-Benz S65 AMG, and 2020 Mercedes-Benz GLA250. However, it is still accessible from the selected car via links, so may be relevant.

Model 460, 461

Model 463 except code 979 (Special protection MB Guard)

Illustration shows model 461.302

Fig 1: Identifying Brake Fluid Reservoir

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	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
	Risk of injury . Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Notes on repairs to brake system		AH42.00-P-0003-01A
	Brake fluid notes		AH42.50-P-0001-01A
1	Open engine hood
	Clean
2	Clean cap and brake fluid reservoir (1)
3	Unscrew cap
4	Suction off brake fluid from brake fluid reservoir (1)
5	Fill with new brake fluid up to the "MAX" mark in the brake fluid reservoir (1)
	General brake fluid		DOT 4. See GENERAL BRAKE FLUID (https://bevo.mercedes-benz.com/index.php?language_id=1)
	Brake fluids (DOT 4 plus)		MB 331.0 brake fluid A 000 989 08 07
		Brake fluid	*BF42.10-P-1001-01B
6	Connect filling and bleeding unit on brake fluid reservoir (1) and switch on
	000 588 01 82 00 Filling unit		WS25.00-P-0016B
	000 588 01 82 00 Filling unit	Pay attention to manufacturer's operating instructions.	WS25.00-P-0016B
7	Raise vehicle
8	Remove front wheel-and-tire assemblies		AP40.10-P-4050G
9	Allow brake fluid to flow out at bleed screws on brake calipers
		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 463.270/271 except code 979 (Special protection MB Guard)	AR42.10-P-0010GX
		Bleed screw at front axle fixed brake caliper, bleed screw at front axle fixed brake caliper	*BA42.10-P-1001-02B
		Bleed screw to front axle floating brake caliper, bleed screw to front axle floating brake caliper	*BA42.10-P-1001-03G
		Bleed screw at rear axle floating caliper, bleed screw on rear axle floating caliper New brake fluid must escape without any bubbles via the bleed hose: ↓ Carrying out bleeding operation	*BA42.10-P-1001-17B
10	Allow brake fluid to flow out at bleed screws on central clutch release bearing	Vehicles with manual transmission
			AP29.00-P-2981G
		New brake fluid must escape without any bubbles via the bleed hose: ↓ Carrying out bleeding operation
	Clean
11	Clean brake fluid off wheel brake cylinders, brake cover plate, brake calipers and clutch slave cylinders
	Check
12	Check the clutch operator for proper operation and leaktightness	Vehicles with manual transmission If complaint present ↓ Determine and rectify cause, subject to separate repair order.
13	Check brake system for leaks	If complaint present ↓ Determine and rectify cause, subject to separate repair order.
14	Install in the reverse order
15	Correct fluid level in brake fluid reservoir (1)		AP42.50-P-4210G

FRONT AXLE FIXED BRAKE CALIPER

Number	Designation		Model 460	Model 461, 463
BA42.10-P-1001-02B	Bleed screw at front axle fixed brake caliper	Nm	14	14

FRONT AXLE FLOATING BRAKE CALIPER

Number	Designation		Model 463.270/271
BA42.10-P-1001-03G	Bleed screw to front axle floating brake caliper	Nm	17

REAR AXLE FLOATING CALIPER

Number	Designation		Model 461, 463 (except 463.270/271/272/273)	Model 463.270/271/272/273
BA42.10-P-1001-17B	Bleed screw on rear axle floating caliper	Nm	15	17

BRAKE FLUID

Number	Designation			Model 460, 461	Model 463
BF42.10-P-1001-01B	Brake fluid	Filling capacity	Liter	≈0, 45-0, 6	≈0, 6...0, 83
		Specification		DOT 4. See GENERAL BRAKE FLUID (https://bevo.mercedes-benz.com/index.php?language_id=1)	DOT 4. See GENERAL BRAKE FLUID (https://bevo.mercedes-benz.com/index.php?language_id=1)
		Specification		MB 331.0 brake fluid A 000 989 08 07	MB 331.0 brake fluid A 000 989 08 07