How to Install an Air Max Filter in a C230
1. Pull the hood release lever next to the driver's seat. Raise the hood and prop it open with the support arm.
2. Locate the air filter box. On the C230, the air filter box is just to the left of the engine, and it is contoured so that the right side of the box hugs the left side of the engine. You can also identify it by the thick, ridged plastic tube that runs from the front of the air filter box to the intake manifold.
3. Locate the four silver metal clips around the lid of the air filter box and flip them all up. Lift the lid off the air filter box and set it aside.
4. Pull the old air filter out of the air filter box. If you're not entirely sure that you're ready for a new filter, examine the old one closely. If it looks relatively clean, you could consider putting it back in and using it for a while longer. Otherwise, discard it.
5. Place the Air Max filter in the air filter box.
6. Replace the lid to the air filter box and snap down all of the metal clips.
7. Hold the hood while you lower the support arm, then close the hood firmly.