Remove/install ESP brake pressure sensor - AR42.45-P-0816RT

MODEL 251

Fig 1: Identifying ESP Brake Pressure Sensor Remove/Install Components

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

30.5.08

Remove wiper system, added

Step 4

AR82.30-P-6400RT

	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	All models	AH42.50-P-0001-01A
	Notes on repairs to brake system	All models	AH42.00-P-0003-01A
1	Switch off ignition and remove the transmitter key from the EIS [EZS] control unit	On vehicles with code (889) Keyless Go: Press Keyless Go start and stop button repeatedly until the ignition is switched off. Remove transmitter key from vehicle and store it in a location beyond its transmission range (at least 2 m).
	Risk of injury caused by fingers being pinched or crushed when removing, installing or aligning hoods, doors, trunk lids, liftgates or sliding roof	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
2	Open engine hood and raise to vertical position	Keep body parts and limbs well clear of moving parts.	AR88.40-P-1000RT
3	Unclip water drain pipe (1)	On left hand drive vehicle only. Pay attention to correct seat of water drain pipe (1).
4	Remove wiper system	Only on right-hand drive vehicle.	AR82.30-P-6400RT
5	Suction off brake fluid from brake fluid reservoir
6	Disconnect electrical connector (2) from ESP brake pressure sensor (B34)
7	Unscrew and remove ESP brake pressure sensor (B34)	Collect brake fluid which flows out using a non-fluffing, absorbent rag.
7	Unscrew and remove ESP brake pressure sensor (B34)		*BA42.45-P-1001-01K
8	Install in the reverse order
9	Bleed brake system		AR42.10-P-0010RT
9	Bleed brake system		*BF42.10-P-1001-01H
10	Check fluid level in brake fluid reservoir; correct if necessary
	Brake system - inspect fluid level		AP42.10-P-4210RT
11	Read out fault memory
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
	Checking
	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
12	Check brake system for leaks		AR42.10-P-0100-01RT

ELECTRONIC STABILITY PROGRAM (ESP)

Number	Designation		Model 251
BA42.45-P-1001-01K	Brake pressure sensor to master brake cylinder	Nm	35

BRAKE FLUID

Number	Designation			Model 251
BF42.10-P-1001-01H	Brake fluid	Filling capacity	Liters	≈ 0, 8
		Specifications for Operating Fluids	Specification	DOT 4. See GENERAL BRAKE FLUID
			Specification	MB 331.0 brake fluid A 000 989 08 07