theres should be a foam block behind the small bit of plastic. but you would be fine to foam it keep it contained tho

 

Why is it that everytime someone brings up an issue,it brings to light,a simular issue that others are experiencing with their B5's ? "sigh"....

When i am driving on the highway,when i turn off my kicking *** system(which is rare ) i notice a sound "SQEAKY SOUND"coming from the right side of my car,coming from within the car. The sound is simular to something rubbing together,making the squeaky sound. anyone know what may be causing this?

 

I suggest leaving the system on. Turn it up as necessary.

 

I have the exact same issue. I even had water get in there once. I may pull them off. Probably lay some RTV around the edges and put it back.