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Home >> Mercedes Benz >> 1998 >> S500 >> Repair and Diagnosis >> Steering >> Power Steering >> Steering - 140 Chassis >> Testing & Repair >> Fill power steering pump and bleed - AR46.30-P-0010A

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

MODEL 170, 202, 208 with ENGINE 111 

MODEL 129, 140 with ENGINE 104, 119, 120 

MODEL 202 with ENGINE 604, 605, 611 

MODEL 140 with ENGINE 606 

Fig 1: Identifying Expansion Reservoir And Plastic Sleeve - Model 202 With Engine 604, 605, 611
G04685956Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
MODIFICATION NOTES

23.4.06 Document adapted to changed procedure    
  Charging     
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
DANGER Risk of injury  caused by fingers being pinched or crushed  when removing, installing or aligning hoods, doors, trunk lids, tailgates or sliding roof. Keep body parts and limbs well clear of moving parts. AS00.00-Z-0011-01A
DANGER Risk of death  caused by vehicle slipping or toppling off of the lifting platform. Align vehicle between the columns of the lifting platform and position the four support plates at the lifting platform support points specified by the vehicle manufacturer. AS00.00-Z-0010-01A
1 Hoist vehicle with lifting platform until wheels are free    
2 Fill expansion reservoir (30) with MB steering gear oil NOTESDo not start the engine! 
If the engine is started there is the danger that air gets into the hydraulic steering system which cannot be removed without taking further action.
IMPORTANT Fill the expansion reservoir (30) to approx. 10 mm below the upper edge of the reservoir with MB steering gear oil.
IMPORTANT Add MB steering gear oil continuously, until the oil level remains constant.
 
    FLUID SPECIFICATION *BF46.20-P-1001-01A 
  Bleeding     
3 Turn steering wheel from steering stop to steering stop NOTESDo not start the engine! 
If the engine is started there is the danger that air gets into the hydraulic steering system which cannot be removed without taking further action.
IMPORTANT Turn steering wheel slowly from steering stop to steering stop until no more bubbles are ascertained in the expansion reservoir (30)
IMPORTANT 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 (30) 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 running engine Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not grasp hot or rotating parts.
AS00.00-Z-0005-01A
4 Start engine without moving the steering IMPORTANT Allow the engine to run for approx. 1 minute at idle speed.  
    IMPORTANT During this process, a second person must observe the oil level in the expansion reservoir (30) and add MB steering gear oil if necessary.  
5 Turn steering wheel from steering stop to steering stop IMPORTANT When the engine is running turn the steering wheel slowly several times from steering stop to steering stop, meanwhile add MB steering gear oil to the expansion reservoir (30)
IMPORTANT Repeat the procedure until the oil level in the expansion reservoir (30) remains constant and bubbles are no longer visible.
 
INSPECT Checking     
6 Check oil level in the expansion reservoir (30) and fill up to the maximum fill level IMPORTANT The oil level in the expansion reservoir (30) must always be filled up to the maximum.  
REFER TO MAINTENANCE Power steering - checking and correcting oil level Model 129, 140, 208, 202 up to 31.8.95 AP46.00-P-4611BA 
REFER TO MAINTENANCE   Model 170, 202 as of 1.9.95 AP46.00-P-4611BB
7 Check the steering system for leaks and proper operation when the engine is running IMPORTANT In the event of leakage, find and eliminate cause.  
8 Lower vehicle    
FLUID SPECIFICATION STEERING GEAR

Number Designation Model 129 Model 140 Model 170
BF46.20-P-1001-01A Power steering Filling capacity Liters ≈ 1.0 ≈ 1.4 ≈ 1.0
MB steering gear oil Sheet BB00.40-P-0236-03A BB00.40-P-0236-03A BB00.40-P-0236-03A
FLUID SPECIFICATION STEERING GEAR

Number Designation Model 202 Model 208
BF46.20-P-1001-01A Power steering Filling capacity Liters ≈ 1.0 ≈ 1.0
MB steering gear oil Sheet BB00.40-P-0236-03A BB00.40-P-0236-03A