Daimler is sticking to the rules governing emissions levels for its cars, the German automotive company’s chief executive told CNBC, as the diesel scandal surrounding the car trade shows no signs of dissipating

Dieter Zetsche’s comments come amid media reports Monday that the U.S. Environmental Protection Agency had requested information from Daimler’s Mercedes-Benz brand to explain emissions levels in some of its cars.

“When we talk about diesel specifically in our sales, we see no change in Europe where the bulk of our diesel engines is sold,” Dieter Zetsche told CNBC.

“In the take rate for diesels we have no conversations in our showrooms about that topic so from the market side we see no impact so far.”

He did concede that the industry as a whole had a credibility issue.

A spokesman for Daimler told Reuters that the group was fully cooperating with the request for information. According to the news agency, the EPA request for information came in response to a class-action lawsuit filed in February, which Daimler told Reuters was wholly unfounded and without merit.

Meanwhile the CEO of Jaguar Land Rover told CNBC the group was committed to lowering emissions. The group’s newest F-type SVR made its debut it the Geneva Motor Show – the fastest car the group has ever built. Ralph Speth said the group was striving to find a balance between environmentally friendly, low-emission cars and high performance.

“We are absolutely committed the better air quality,” he said.