Tumble Flap Actuator Repair - C Class - W204 - Mercedes-Benz

Tumble Flap Actuator Repair Time: 1 hour Tab: $300 Talent: 1 Tools: T30 Torx, small flathead screwdriver Applicable Models: Mercedes-Benz C350 (2008-14) Mercedes-Benz GLK350 (2010-14) Parts Required: Actuator repair kit, silicone grease, blue Loctite Hot Tip: Lube the ball cups Performance Gain: Better engine performance Complementary Modification: New injector O-rings Along with the variable intake runners on the intake manifold on the Mercedes C350 the manifold also has tumble flaps. These tumble flaps on each side of the intake help swirl the air entering the combustion chamber helping with performance and economy. While the system works reasonably well, over time carbon will build up on the flaps and cause more stress on the plastic actuator arm than the system was designed to handle. This usually results in the failure of the plastic pivot lever where it meets the actuator arm. If you drive the car long enough you are going to see this part break and result in poor low end performance as well as a drop in fuel economy. Make sure to clean the manifold of excessive carbon build up on the swirl flaps before reinstalling the manifold. Excess carbon deposits can lead to inconsistent performance even after repair. While some shops can charge upwards of $3000.00 dollars to fix this Pelican Parts sells a repair kit that will get you back up and running for a fraction of the cost. While the repair to the actuator and pivot lever can be performed in under an hour you do need to remove the intake manifold to access the repair. Please see our article on intake manifold removal for additional information. Save thousands of dollars by performing this repair yourself Applies to: C350 (2007-14), SLK350 (2004-14), CLS350 (2004-14), CLK350 (2005-14), E350 (2005-14), S350 (2005-14), SL350 (2005-14), R350 (2006-14), ML350 (2006-14), Viano (2005-14), Sprinter (2006-14), CLC350 (2008-14), GLK350 (2008-12)