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Code P06DA00 (oil pump valve located inside the engine oil pan)

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147K views 47 replies 23 participants last post by  GTKim  
Lots of posts on other forums about this. There is a discussion on MBWORLD that argues that the fault is actually beneficial in that it disables the reduced oil pressure setting in the 2-stage oil pump, which is set to be normally open. Only when the car is running is the oil pressure reduced under 3500 rpm. The use of 2-stage oil pumps is not unique to Mercedes, and is only one of those things used to reduce fuel consumption, just like the start/stop feature.