Daimler's star shines on Stuttgart. For over a century, the capital of the German province has lived and breathed the automotive industry.
Now many locals are gasping for air.
Stuttgart has regularly exceeded the European limits for both nitrous oxide and fine particulate matter, which is increasingly linked to everything from damage during pregnancy to dementia.
The city regularly checks its air quality, but for many it is not enough.
Now, thanks in part to people's power, the number of days when security limits have been violated is decreasing.
In an office in the city center, environmental activist Lucas Mocek told ITV News that it's easy to assemble air quality monitors, costing only £ 30, helping them put pressure on government officials.
Developed by The OK Lab company, Mr. Mocek insists that this economic piece of technology is just as good as that used professionally.
He said: "It is quite accurate, in 2015 we delivered it to a material institute here in Stuttgart and compared it in a professional room against a professional measuring device and there was a difference next to today".
With 700 devices throughout the city of Stuttgart and over 5,500 scattered across Europe, the data collected by these appliances is used to display the problem on a dedicated website.
For residents like Eva Weinmann, it is about making the car capital of Germany more liveable.
"I see that my friends are moving more and more from the city and instead of complaining and following them I think we can actually increase our awareness a little more," he said.
The local government, which is facing increasing pressure from public opinion for clean air, is now respecting the European legal limits and promising that things will improve.