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I guess I don't understand Mercedes EGR monitor theory
Posted to Technical Discussion Forum on 2/25/2021 13 Replies

This car came in with a P0400 which we have seen before and diagnosed fairly easily. Bad valve, bad electric valve which comes with the valve or plugged ports, vacuum or flow. This particular vehicle has a very well maintained 180k on the clock.

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car Vehicle Data

2003 Mercedes-Benz C240 4Matic 2.6L

Engine2.6 L
Trans5-speed Automatic (Electronic)

car Vehicle Data

2003 Mercedes-Benz C240 4Matic 2.6L

Engine2.6 L
Trans5-speed Automatic (Electronic)