Mercedes-Benz CLK350 intake manifold failure causing check engine light and rough idling due to broken actuator arm on Mercedes-Benz CLK350

Some Mercedes-Benz CLK350 owners report experiencing intake manifold failure, which can trigger a check engine light and cause rough idling, often due to a broken actuator arm. This issue is commonly linked to the actuators for the variable system, leading to the disconnection of the interior flap. Specifically, the adjustable air flap, known as a runner or swirl flap, may break, resulting in unpredictable performance depending on its orientation. Additionally, oil residue drawn into the manifold via the PCV system can create sludge, interfering with flap movement and potentially causing actuator breakage or preventing them from returning to their resting state. The presence of error code P2006, indicating a tumble flap actuator issue, is also reported. While a new intake manifold is typically recommended, replacement actuator parts are available for those seeking an alternative solution.