How often(if ever) have you fellow BW owners replaced the under-seat air filters? Are they a pain to change? I read the manual, but some "real life" experience would be helpful

 

I have changed the filters once. they aren't cheap . about 49 bucks apiece at the dealer. only place to get them. just push the seat buttons to raise the rear of the seat all thew way up so it sits at anangle. you need to open the rear door a nd lay on the floor . you should be able to see the filter . it just pops out and the new one pops in. hope this helps