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On average, the cost for a Mercedes-Benz S420 Power Steering Fluid Service is $165 with $70 for parts and $95 for labor. Prices may vary depending on your location.
Power steering fluid flows through the power steering hydraulic system. The system is pressurised by the power steering pump and by way of valves, plungers, or pistons decreases the effort needed by the driver to turn the steering wheel. When the pump stops pumping, the pressure drops and the power steering system loses its hydraulic pressure.
As components in the steering system wear, metal particles will contaminate the fluid, which will cause seals in the system to leak and components to eventually fail. Checking the fluid level and changing the fluid at regular intervals recommended by the manufacturer is important for the life of the hoses, pistons, valves, seals, and the power steering pump itself.
Consider getting a power steering flush once every 3-4 years.
Changing your power steering fluid at manufacturer recommended intervals, will ensure continued system performance and extended service life. It is a part of scheduled maintenance services and will sae you the trouble of major repairs down the road.
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