Mercedes vehicles with the V6 M272 and V8 M273 engines commonly suffer from failure of the intake manifold causing vehicle faults. Mercedes only solution to this is to replace the complete intake manifold at vast expense- which would just fail again. Our repair kit allows you to replace just the lever component that fails on the manifold with an improved design part which will not fail. SYMPTOMS OF FAULT: Symptoms can include some or all of the below: Check engine light (CEL) is lit / on with P code P2004, P2005 or P2006 stored in the system. Engine control module has stored pending codes for intake manifold, air flap or runner control system. Error messages; tumble flap stuck in activated position, intake manifold runner control stuck closed. Emissions test failure. Poor idle, loss of power, delayed acceleration, increased fuel consumption. To diagnose this fault you can visually inspect the manifold, remove engine covers and inspect intake manifold from above, using a torch you should be able to see down the front of the manifold and see if the lever is damaged. MERCEDES V6 M272 AND V8 M273 ENGINES ONLY. ASSOCIATED PART NUMBERS: 2721402401, 2721402201, 14433043001, 2721402401, 2721402401, 2721402201, 2721402201, 2721402101, 2731400701, 2721412280, 2721412080, 2721412380, 2721412180, A2721402401, A2721402101, A2721402201, A2731400701, A2721412280, A2721412080, A2721412380, A2721412180.