...(since it is covered and stuff)? would a plain filter on a s500 mercedes 2001 make a difference in the sound (since it is covered and stuff)
and what are the risks i heard it messes up sum sensors and stuff...
It won't change the sound. The only thing that it can damage is the mass air flow sensor. Sometimes the oil from the air filter dirties up the mass air flow sensor causing it to give false readings. This is usually caused by over oiling the filter.