FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM
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Car repair manuals for everyone.
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Mercedes Benz
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2002
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S 430 (220.170) V8-4.3L (113.941)
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Cooling System
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Heater Control Valve
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Locations
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Rear Duovalve
Rear Duovalve
Component Identification:
The duovalves (A31/1yl, A31/1y2) are located in the engine compartment at the right rear next to the coolant circulation pump (A31m1)