Try non-conformity under European law. Threaten to cancel the contract and follow through. Win your lawsuit. Make life better for all of us. The point is that

Try non-conformity under European law. Threaten to cancel the contract and follow through. Win your lawsuit. Make life better for all of us. The point is that non-conformity suits often hardly have any stake. Why bother for €100. With a Tesla, it's different. Software regressing is clearly non-conform. And non-conformity is not related to the waranty periode either, but to the expected lifetime of a product. In case of a car, many years. I think a ruling by the European court that software should be safe and functional throughout the expected lifetime would be the best that can happen for consumers.