Maval Power Steering Pump Mercedes-Benz S350 2006 for 2006 Mercedes-Benz S350 W0133-2033989

Notes:

w/o Active Body Control (Code 487)
If you receive customer reports in the above model vehicles of flow noises from the area of the power steering pump, and/or foaming of the power steering fluid in the reservoir following work carried out on the hydraulic steering system; this may be caused by an improper procedure followed for filling and bleeding of the power steering fluid into the system.
To remedy, it is absolutely necessary to make sure that the procedure described in the WIS documents is strictly adhered to. In particular, it is necessary to turn the steering to full lock-to-lock at least 30 times BEFORE STARTING THE ENGINE. If this is not done prior to starting engine, there is a high risk of air entering the steering system, which is subsequently very difficult to eliminate.
Note: Starting the engine prior to bleeding can cause irreparable damage to the power steering pump and will cause an air cushion to form in the steering gear which causes noise. Once the air is ingested, the ingested air will only dissipate after driving the vehicle for at least 30 miles.