Genuine Mercedes-Benz C230 Intake Manifold

Mercedes-Benz C230 Intake Manifold Parts and Q&A

• Intake Manifold
  272-140-24-01-80
  Q: How do the design and replacement procedures for the variable intake manifold on Mercedes-Benz C230?

  A:

  The variable intake manifold system available on 2001-2005 V6 models (controlled by PCM) maximizes the engine torque by swapping between two different lengths of intake manifold between, two corresponding intake manifold runners, flapped by a pair of flap runners utilizing a diaphragm unit. When engine speed is reduced, the flaps are left open, forcing the air through shorter runners, to increase torque. At loads above 50 percent the PCM turns on the switchover valve and enables the air to pass through longer runners, which enhance cylinder charging and torque. At velocities above 3900 rpm, shorter runners are automatically switched to keep the system running. The intake manifold is improved further in V6 models in 2006 and again in subsequent V6 models, with two diaphragm units to control the flaps, and also adds more turbulence to the air within the combustion chamber with more tumble and additional flaps. In models produced up to 2005 with replacement parts needed between 2001 and 2005, the switchover valve is reached by removing the front engine cover, disconnecting the electrical connector and vacuum hoses, and then removing the valve. The unit of diaphragm is also reached and removed. In subsequent design, in 2006 and further design, the process of changing diaphragm units, and switchover valves, is to take one front engine cover, cut of the hoses and connectors and then ransack the component and the reverse of assembling the 2006, 2006 designs, replaced the component as with 2008.
• Intake Manifold
  111-141-20-01-81
  Q: How to remove and install the intake manifold in the Four-cylinder engines on Mercedes-Benz C230?

  A:

  The first step to get the intake manifold out is to relieve the fuel system pressure. Unscrew the cable off the negative end of the battery and unscrew the engine cover your engine has. Then remove air intake duct and air filter housing (where fitted). Unattach the PCV hose, vacuum hoses and electrical connectors fixed on the intake manifold and throttle body, and unattach the throttle body electronic throttle control system connector. Unscrew the two bolts that hold the fuel rail to the intake manifold, then use a lot of caution in lifting the injectors up and out. Then loosen the intake manifold bolts and extract the intake manifold and gasket, which requires some of the clamps on the engine wiring harness to be removed. Installment- To install, clean and scrutinize intake manifold to Cylinder Head sealing surfaces, and exam whether the gasket is damaged and must be ordered separately in case of damage. Install the intake manifold with the gasket positioned at all cylinder head dowel locations, and screw the manifold bolts to the correct frag. Lastly, fit the fuel rail and injectors to the manifold and then, fit the last part of the installation in the reverse order of removal. After all is reassembled, start the engine and test to see that there are none of the following leaks: fuel, vacuum, and coolant.