Removing/installing expansion reservoir - AR46.25-P-1000VA

MODELS 171.454 with Engine 272.942 

MODELS 171.456 with ENGINE 272.963 

MODELS 171.473 with ENGINE 113.989 

Shown on model 171.456 

Fig 1: Identifying Expansion Reservoir Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury  to skin or eyes from hydraulic fluid spraying out under pressure. Risk of poisoning  from swallowing hydraulic fluid.	Depressurize the hydraulic system completely before starting any work on the system. Wear protective clothing and safety glasses.	-
	The area around the separation point should be cleaned thoroughly before opening the hydraulic circuit of the power steering. Even minute particles of dirt, introduced into the hydraulic components, can result in malfunctions or damage to the power steering.
1	Open engine hood and raise to vertical position		AR88.40-P-1000V
2	Remove the left engine intake air duct
3.1	Remove front engine cover	Model 171.473 See ↓
		Remove air filter housing.	-
4	Remove cap (1) on power steering expansion reservoir (2)	Press the cap (1) downwards and turn counterclockwise through 90°.
5	Suction off MB steering gear oil from expansion reservoir (2)	MB steering gear oil	*BF46.20-P-1001-01A
		Hand pump	Figure
6	Detach return hose (3) from expansion reservoir (2)	Collect MB steering gear oil with rags and seal connections immediately using stop plugs.
		Set of plugs	Figure
		7 mm socket hexagon	*WH58.30-Z-1002-06A
7	Use pulling hook (01) to pull out clamp (2a) to the side	Pulling hook	Fig 4
8	Unscrew bolts (2b).	Bolt, expansion reservoir to front cover	*BA46.25-P-1001-01D
9	Remove expansion reservoir (2) from the connection fitting of the power steering pump (4)	Installation:  Replace sealing ring (2c).
10	Install in the reverse order
	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 engine	Secure vehicle to prevent it from moving. Wear closed and snug-fitting work clothes. Do not grasp hot or rotating parts.	-
11	Fill power steering pump and bleed		AR46.30-P-0010V
12	Check oil level in expansion reservoir (2) and correct if necessary
	Power steering - checking and correcting oil level		AP46.00-P-4611V

Fig 2: Identifying Hand Pump (210 589 00 71 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Set Of Plugs (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Pulling Hook (140 589 02 33 00)

Courtesy of MERCEDES-BENZ USA