As more deadlines in Volkswagen’s Dieselgate scandal approach, details of the lengths the company may have gone to circumvent emissions regulations continue to emerge.

In a report Tuesday from Reuters, citing German newspaper Handelsblatt, that the parent of Audi decided to implement the technology in the hopes of getting some diesel engines to meet emissions requirements. The software was later used in roughly 11 million VW Group vehicles worldwide until last year.

This report follows another from Bloomberg that Volkswagen’s “cheating code” has hampered search efforts by investigators determining the source of the so-called Dieselgate scandal. At the same time, there is an April 21 deadline looming for VW to present a plan to fix the roughly 600,000 vehicles in the U.S. affected by the scandal, as well as 600 plaintiffs who’ve tried to sue the company for damages and the prospect of a trial that could go through the summer.

Both sides on Dieselgate are sounding increasingly weary and pushed to come to an agreement on a fix, which still has to appease the EPA and California Air Resources Board. VW dealers have also grown increasingly restless against both the company’s U.S. and German offices for support amidst sliding fortunes.

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