The Ford Mondeo 2.0 TDCi is being investigated by German authorities at the request of the country’s transport ministry for alleged use of emissions-cheating devices, AutoCar said.
German business publication Wirtschafts Woche reported the probe and that information in exhaust tests have led to the allegations.
Previous investigations by Germany's transport ministry looked at the Focus and C-Max for the same reason, although no wrongdoing was found.
Since the outbreak of the diesel scandal, German authorities have been thorough in investigating all areas of the car industry, with investigations spreading to Daimler, BMW, Opel and Fiat Chrysler Automobiles, in addition to Volkswagen Group.
Ford insists that its cars comply with emissions regulation and do not use any illegal defeat devices.
The brand issued the following statement: “The KBA [the German transport authority] contacted us for the first time last week as part of its normal market surveillance program for all auto manufacturers. Last year, the same car model achieved four Ecostars in ADAC testing and, from a comparison of DUH summer and winter tests, it can be concluded that no 'thermal operation' was evident.
“In addition, the UK Government’s Department for Transport tests in 2016 on the Mondeo 2.0 TCDi noted that there was no evidence of test cycle manipulation. We continue to work with the KBA and are confident that its investigation also will confirm that there is no illegal defeat device fitted to the car.”