Remove/Install Power Steering Expansion Reservoir - AR46.25-P-1000RD

Model 172 with engine 274 

Model 172 with engine 276, 651 as of model year 2016 

Shown on ENGINE 274 

Fig 1: Power Steering Expansion Reservoir Components Location - Model 172 With Engine 276 (Shown On Engine 274)

Courtesy of MERCEDES-BENZ USA

	Risk of injury  to skin or eyes from hydraulic fluid spraying out under Pressure. Risk of poisoning  from swallowing hydraulic fluid.	Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses.	AS00.00-Z-0013-01A
	Remove/install
1	Clean connecting points of hydraulic system before opening
2	Extract oil from Expansion reservoir (Power steering) (4)	Hand pump	Fig 3
3	Remove cover (2), to do so the Expansion rivet (1) has to be removed.	Model 172 with engine 274
4	Remove Bolt (3) and pull Expansion reservoir (Power steering) (4) with connected lines upwards and place to one side	Model 172 with engine 274 Expansion reservoir Bolt	*BA46.30-P-1003-01R
5	Release locking tab on Expansion reservoir (Power steering) (4) by pressing it, the pull upwards with connected lines and place to one side	Model 172 with engine 276, 651 as of model year 2016
6	Detach return line (5) and feed line (6) from Expansion reservoir (Power steering) (4)	Collect the discharged oil using a rag.
7	Seal connections with stop plugs	Record plug	Fig 2
8	Remove Expansion reservoir (Power steering) (4)
9	Install in the reverse order
10	Fill Power steering pump and bleed		AR46.30-P-0010RD
	Check
	Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
11	Test-run engine and check steering system for leaks and proper operation

Fig 2: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Hand Pump (210 589 00 71 00)

Courtesy of MERCEDES-BENZ USA