It doesn’t look like the dieselgate mess is going to be cleared up any time soon, as Porsche has now been dragged into the argument.

With Audi recently having been collared over allegations of steering angle-based emissions defeat devices, Germany’s Ministry of Transport has now ordered an investigation into the Cayenne V6 diesel.

Major national newspaper Der Spiegel has reported that its own test suggests the model’s nitric oxide emissions break the legal limit, but Porsche says its own tests disagree, calling the newspaper’s findings ‘implausible’. It’s all a bit he-said-she-said, hence the official investigation.