Solenoid Valve ? - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 09-30-2011, 11:25 PM Thread Starter
BenzWorld Junior Member
Date registered: Aug 2011
Vehicle: 1993 W124 200E
Location: South Africa
Posts: 5
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Solenoid Valve ?

Can anybody please help. The solenoid valves (top drivers side of engine compartment) in my w124 1993 200E are pulsing and making a knocking sound. The is no pattern as to when this occurs, it happens when the car is cold or warmed up and sometimes not at all. It also occurs whether the heating is on or off and the heating works fine. Can anybody shed some light on this? It does not appear to be affecting the performance of the car in anyway but the pulse can be felt through the pedals and as you can imagine is quite annoying.

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