The small triangular glass located near the side windows of cars is not just an ornamental element, but there are some practical functions.

In modern vehicles, it helps improve visibility, especially near the side mirrors and parking maneuvers.

It also enables designers to adjust the shape of doors and the mechanism of the main glass.

In old cars, these windows had another function: they could open up and help fresh air into the cabin.

This was especially beneficial before the air conditioning became common equipment in vehicles.

With modern air – conditioning systems developed, mobile windows disappeared gradually.

Today, their presence is primarily related to three reasons: improving the landscape, adapting door mechanisms, and designing vehicles.

However, the exact function varies according to the model and position of the glass.