1 of 2.. 2004 Mercedes C230 w203 shaking, chugging when idled or coming to a stop repair $5 part

The other day I was driving and needed to pick up fast which I really do but after I came to a stop the car was chuggin and sounded like it was going to stall. When I got home I sprayed some alcohol on all of the rubber air parts and found that this supercharger rubber piece on the front of the engine was spitting out the alcohol so I went to Home Depot and bought a part for only five bucks and now the car has massive power , more than it ever had and it stopped shaking