How to change the cabin filter
You will see arrows on the side of the cabin filter. They indicate the direction of the air flow. Respect these indications when repositioning the filter.
The anti-pollen recirculation filter blocks even the smallest allergy particles from entering (as a human respiratory system can't fully stop it). Particles can reach the bronchi and provoke allergies and asthma. Active carbon filters absorb both particles and odours. The filter system has an active carbon layer between two non-woven fiber layers. A combi-filter (that adsorbs both particles and gases) can reduce harmful and unpleasant gases concentrations. These gases can provoke headaches and sneezing. Check that your vehicle is equipped with this filter, it often depends on whether your car has air conditioning or not.