Hello Rockabilly welcome to the forum it's down by the back of the heater there's a panel it's a bit of a pig to do i'm sure there is a how to just one thing have you got aircon if you have not there's no pollen filter :thumbsup:
As above, drivers side footwell above pedal area, a real sod of a job to do. I've just had mine replaced and looking at them they have never been done in nearly 5yrs.
2009 Citroen Berlingo 1.6hdi Lx van
1999 Peugeot 406 V6se coupe