C 240 4MATIC Sedan (203.081) V6-2.6L (112.916) (2005)
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Component Identification
Pressure limiting
A pressure limiting valve (49d) is installed in the quantity control valve (30t) to protect the steering system against overloading. It opens at a pressure
between 65 and 125 bar depending on the model of power steering pump.
This occurs, for example, at full steering lock, and is audible as a high-pitched whirring whistle.
