(Bloomberg) -- Volkswagen AG’s namesake brand, its Audi and Porsche divisions, Daimler AG’s Mercedes-Benz unit and General Motors Co.’s Opel agreed with German authorities to recall 630,000 cars Europewide to fix temperature-control setups on diesel models’ emissions systems.

The voluntary move affects diesel cars with engines that meet the Euro-5 and later Euro-6 standards, German Transport Minister Alexander Dobrindt said Friday at a Berlin press conference. Terms for dealing with any models built by carmakers outside Germany will have to be agreed on with regulators that certify those vehicles, he said.

Temperature thresholds not justified

The recall is meant to fix a device that turns off emissions controls at particular temperatures as a means to protect the engine. A German probe of 53 models that tested them in the laboratories and on the road found that temperature thresholds at which the controls shut down weren’t justified, Dobrindt said.

The regulatory investigation was prompted by Volkswagen’s revelations in September that it had installed software on diesel motors designed to cheat on official emissions checks. None of the models tested were found to use illegal devices designed to defeat the tests, the minister said.