Audi A4 B5 Air filter change help?!?

i need to know where the air filter is on a 1999 audi a4 1.8t. i want to replace it with a K%26amp;N air filter. how can i change it? where is it located exactly? cuz i really cannot find it. a step-by-step would be great thank you.Audi A4 B5 Air filter change help?!?Passenger side, its the large plastic box with a large black tube going to the throttle body. There should be 3 or 4 clips keeping it closed. Just pop those clips and swap the filter, 2 minutes max.