After the AC is used for a little while (1+ hour) the air coming out the vents is noticeably less no matter what fan speed you select. Although you hear the fan speed increases/decrease with the change the air volume is very very little and doesn't change.

So leave the AC off, open the windows.....After a little while try again and same thing.

Time to change FSU like the e39 you think?

__________________
2003 4.6is Black/Black, New M62tu engine block from BMW (2016)