Nearly two months after German law enforcement authorities raided Jones Day's Munich office as part of an investigation into Volkswagen AG, a court has tossed a complaint by the firm about government efforts to obtain materials on its embattled client.

Juve, a leading German legal publication, reported Wednesday that a spokeswoman for a district court in Munich had confirmed the dismissal of Jones Day's objections to a search of its offices as part of an ongoing probe of Volkswagen and its Audi affiliate.

In April, Jones Day retained Frankfurt criminal defense lawyer Jürgen Klengel, a former equity partner at White & Case who started his own firm in February, according to Juve. The move came around the same time that Volkswagen was rebuffed in its bid to have a German court bar prosecutors from using information seized during searches of Jones Day, Volkswagen and Audi. A German judge reportedly condemned a lack of transparency surrounding Volkswagen's so-called Dieselgate fiasco, which has cost the German auto giant at least $25 billion in the U.S.