Loosen the screws and pull the trim behind the glove box forward from the rear clips.
Pull out the clips and lift up the trim.
Loosen the bolts and pull out the air duct.
Disconnect all connectors of the heater control unit and take them to the top.
Loosen the screws and remove the heater cover. With an air conditioner, the casing is smaller, and only 2 bolts need to be unscrewed.
Air conditioner: Unscrew bolt 1, turn fastener 2 by almost 90°and remove cover.
Pull out the microfilter.
Installation
Installation is carried out in the reverse order.