Several car brands have been mentioned in relation to adjusting their emission settings in Germany, particularly in the context of regulatory scrutiny and compliance with environmental standards. Notably, Volkswagen has been at the center of discussions regarding emissions adjustments, especially following the diesel emissions scandal that came to light in 2015. Other brands that have faced scrutiny include:

1. Audi - A subsidiary of Volkswagen, Audi has also been implicated in emissions-related issues.
2. Porsche - Another Volkswagen Group brand, Porsche has been involved in similar discussions regarding emissions compliance.
3. Mercedes-Benz - The brand has faced investigations and has made adjustments to its vehicles to meet stricter emissions regulations.
4. BMW - BMW has also been mentioned in the context of emissions adjustments and compliance with German and EU regulations.

These adjustments often involve software updates or modifications to vehicle systems to ensure that emissions are within legal limits. The German government and the European Union have been actively enforcing stricter emissions standards, prompting these brands to take action.

For the most current and detailed information, you may want to check recent news articles or official statements from the manufacturers.