What's the mercedes benz code p2006?

When a code P2006 is returned in a Mercedes-Benz, it means there is an issue with the intake manifold runner control circuit. In some cases, the harness is just open or shorted or there is a poor electrical connection. In other cases, the actuator is bad or there is an issue with the powertrain control module that is causing it. The intake manifold runner control is an aluminum casting and each cylinder has two intake air passages. One passage stays open all the time. The other has a butterfly valve plate that opens and closes. The trouble code is triggered when the IMRC is supposed to be open, but the monitor says that it is closed. The average cost to repair this part is $670 to $700, which doesn't include taxes and fees.