Historically the German auto industry has held a lot of influence over politicians. They've successfully lobbied against things like a national speed limit and for weakened emissions rules in the past.

More recently, they have blocked and delayed the EU's proposed emissions targets for 2025 and 2030 which would have required 40% fleet-wide CO2 reductions by 2030 and set minimum targets for zero emission vehicles.

(It should be noted Sweden, France, and Spain - who also have significant auto industries - are in favour of the new rules).