Germany's transport ministry is to test a Porsche SUV model following reports it could be in breach of diesel Emissions limits.
Porsche has said the Spiegel test was "implausible" and its vehicles meet emissions requirements.
Its sister company Volkswagen is to pay fines and compensation after admitting cheating on emissions tests in 2015.
Volkswagen fitted some of its diesel vehicles with "defeat device" software designed to detect testing and change performance to improve results.
BBC News.