How to change air filter in a 2003 mercedes E320?

Anyone know how to open the plastic covers of a 2003 Mercedes E320? It is not screwed down. It seems to be snapped on. How to unsnap. I don't want to break anything.How to change air filter in a 2003 mercedes E320?Remove the air intake tubes on the left and right sides. Pull the complete air filter housing up off the rubber mounts. Turn the air filter house upside down and there will be 4 T20 torx head screws on both sides. Unscrew them and remove. Install new air filters and put housing back on in reverse order.How to change air filter in a 2003 mercedes E320?Just disconnect the hoses and pull it up. To access the 2 air filters, you have to unscrew the underside covers ( flip the cover over ).