This from the advert Tesla emailed me highlighting the changes in the new Model S:
A breath of fresh air
The Tesla HEPA air filtration system is now available in Model S. The most effective air filtration system available in a production vehicle removes at least 99.97% of particulate exhaust pollution and effectively all allergens, bacteria and other contaminants from your cabin air.
A breath of fresh air
The Tesla HEPA air filtration system is now available in Model S. The most effective air filtration system available in a production vehicle removes at least 99.97% of particulate exhaust pollution and effectively all allergens, bacteria and other contaminants from your cabin air.