Air filter A / C cabin on 2004 Mercedes-Benz SLK230

I want to change the air filter of A / C cabin and not donte is located or how to do it

it is either under the passengers side of the dash or the cowl vent behind the hood.
Thank you for the information - William
1 more answer
Go to youtube--type in the search--you will find a good description of how to replace. You can order an after market from AutoZone--or from MB dealer. After changing the filter--you will think you have a new air conditioner! :o)