>This is a country with a $2.68 per gallon gas tax, compared to $0.51 in the US.
Irrelevant comparison since US is a widely different animal to most European countries.
It might be expensive compared to the US, but Germany is still one of the countries with the most affordable income-to-cost ratios for car ownership in the Eurozone, so car commuting is incredibly common, especially for those not living in densely populated metro areas.