Germany's auto regulator has ordered Daimler to recall 42,000 Mercedes diesels because the company installed illegal software in their engines that gimmicked the engine's thermostat, which would allow the manufacturer to selectively tune its cars' emissions. Daimler disputes that the software is illegal and has said it will appeal (it says it showed the regulator the software in question last year); but it has formally advised investors to expect a one-time writedown of hundreds of millions of euros over the recall. Today, the Daimler vehicles in question are Mercedes-Benz-brand vehicles that are only sold in the EU.