Tesla defended itself in a Wednesday filing against U.S. and German complaints. American regulators said the automaker has not proved its compliance with environmental regulations and German officials accused it of not taking back customer batteries.

In the filing, the company said the Environmental Protection Agency (EPA) is demanding further details about operations at its Fremont, Calif., plant’s paint facility. The agency said Tesla had not properly documented that its surface coating process for vehicles complies with federal standards governing hazardous air pollutants.

In the filing, the company said it “has responded to all information requests from the EPA and refutes the allegations. While the outcome of this matter cannot be determined at this time, it is not currently expected to have a material adverse impact on our business.”