The information comes from Bild am Sonntag newspaper and was brought to our attention by Automotive News. The authority said it suspected the emissions control devices were being used in the bulk of Daimler's new Euro 6 diesel auto fleet, encompassing some 1 million vehicles, according to the report.
"Daimler says the applications in the motor control software the federal government has found fault with will be removed at the greatest possible speed and in cooperative transparency with the authorities", Scheuer said.
Daimler shares fell following a report that up to 1 million Daimler cars contain illegal defeat devices, as Chief Executive Dieter Zetsche prepared to meet the transport minister on Monday.
Daimler, like other vehicle manufacturers, uses urea nitrate liquids to neutralize nitrogen oxide emissions in exhaust fumes. The firm's compression ignition engines use urea nitrate liquids to naturalize nitrogen oxide emissions in exhaust fumes.
Daimler said last month it would appeal against an order by the KBA to recall the Mercedes van Vito 1.6l Diesel Euro 6 model, following a transport ministry investigation.
Germany can only order the recall of vehicles within its own borders, or of those vehicles issued with a pan-European road-worthiness certification via German authorities.
So-called defeat devices were at the heart of Volkswagen's "dieselgate" scandal, in which the world's largest carmaker admitted in September 2015 to installing them in 11 million vehicles worldwide. That controversy has cost VW about $30 billion in fines.