From the article: *Large SUVs were particularly affected. According to the police, notes were attached to the cars indicating that they were harmful to the climate. The tyres were not punctured, but merely deflated. The cars were parked in the area between the S-Bahn line and Elbchaussee around Kanzleistraße. *
Personally, I like this protest way more than glueing themselves to the streets, causing traffic jams where cars burn gasoline for hours and ambulances / firefighters / police gets stuck, putting innocent life in danger.
The article is in German. Warning: this link leads to google translate.
You’re right that this post is not about the US and is specifically about Hamburg, but many of the comments here seem to imply that this is a wider reaching sentiment. The reality is that many people can’t afford to change their vehicle, either due to financial reasons (their SUV or other vehicle is old and not going to get much from an exchange) or due to their lack of time. Going after random people in one city in Germany is not going to have the effect that they’re hoping for. It will cause outrage, which might be the goal, but the target will be the activists, not the car manufacturers.