What is known to cause yawning in Audi 80 vehicles?

I have noticed that my Audi 80 sometimes makes me yawn while driving. What could be causing this phenomenon?

The most common cause of yawning in Audi 80 vehicles is low levels of oxygen in the cabin. This can happen if the air filter is dirty or if there is a leak in the ventilation system.

Yawning can also be a sign of high levels of carbon dioxide in the cabin. This could be due to a clogged exhaust pipe or a malfunctioning emissions control system.

Another possible cause of yawning in Audi 80 vehicles is fatigue. Make sure you are getting enough rest and taking breaks on long drives.