Fill power steering pump and bleed - AR46.30-P-0010CW

MODEL 204, 207 

Vehicles without electrohydraulic power steering (EHPS) 

Fig 1: Identifying Engine Air Intake Duct, Power Steering Expansion Reservoir And Cap

Courtesy of MERCEDES-BENZ USA

Vehicles with electrohydraulic power steering (EHPS) 

Fig 2: Identifying Power Steering Expansion Reservoir And Cap

Courtesy of MERCEDES-BENZ USA

	Remove/install
Danger!	Risk of injury  to skin or eyes caused by hydraulic fluid spraying out under high pressure. Risk of poisoning  caused by swallowing hydraulic fluid	Depressurize the hydraulic system completely before starting any work on the system. Wear protective clothing and safety glasses.	AS00.00-Z-0013-01A
		Before opening the hydraulic system the area surrounding the separation point should be cleaned thoroughly. Even the smallest dirt particles, introduced into the hydraulic components, can lead to malfunctions and a total failure of the hydraulic system.
1	Hoist vehicle with lifting platform until wheels are free
2.1	Remove left engine intake air duct (1)	Engine 272, 273
2.2	Remove engine trim panel	Engine 642 Installation:  Ignition switched off.
2.3	Remove front engine cover	Engine 156 Do not tilt front engine cover, but lift upwards vertically otherwise the retaining lugs can break off.
3	Remove cap (2d) from expansion reservoir (2)
	Fill
4	Fill expansion reservoir (2) with MB steering gear oil	Do not  start the engine! If the engine is started there is a risk of air entering the hydraulic steering system, which is then extremely difficult to remove. Fill the expansion reservoir (2) to approx. 10 mm below the upper edge of the reservoir with MB steering gear oil. Refill with MB-steering gear oil continuously until the oil level remains constant.	*BF46.20-P-1001-01E
	Bleeding
5	Turn steering wheel from steering stop to steering stop	Do not  start the engine! If the engine is started there is a risk of air entering the hydraulic steering system, which is then extremely difficult to remove. Turn steering wheel slowly from steering stop to steering stop until bubbles are no longer visible in the expansion reservoir (2). Repeat turning the steering from stop to stop several times (up to 30 times). During this process, MB steering gear oil must be poured into the expansion reservoir (2) by a second person.
Danger!	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
6	Start engine without moving the steering	Allow engine to run for approx. 1 min at idle speed. During this process, a second person must observe the oil level in the expansion reservoir (2) and add MB steering gear oil if necessary.
7	Turn steering wheel from steering stop to steering stop	When the engine is running turn the steering wheel slowly several times from steering stop to steering stop, meanwhile adding MB steering gear oil in expansion reservoir (2).
		Repeat the procedure until the oil level in the expansion reservoir (2) remains constant and bubbles are no longer visible.
	Checking
8	Check oil level in the expansion reservoir (2) and fill up to the maximum fill level	The oil level in the expansion reservoir (2) must always be filled up to the maximum.
	Power steering - checking and correcting oil level	Model 204	AP46.00-P-4611CW
		Model 207.	AP46.00-P-4611EW
9	Check steering system when engine is running for signs of leaks and proper function	In the event of leakage, find and eliminate cause
10	Install in the reverse order