BERLIN — German prosecutors searched the offices of Daimler, the automaker that produces Mercedes cars, on Tuesday as part of an investigation into whether the company improperly evaded emissions rules.

The raids signal a deepening inquiry into Daimler, which had already said that several federal and state authorities in Europe and the United States were investigating the emissions control systems used in Mercedes-Benz vehicles.

Daimler is one of several European automakers that have attracted the attention of regulators on both sides of the Atlantic over emissions standards.

Most notably, Volkswagen has had to pay billions of dollars in settlements and fines over diesel deception, and several of its executives have been investigated or charged. More recently, Fiat Chrysler Automobiles held talks with the Department of Justice to settle an investigation into a similar scandal, although the financial damage was not expected to be as severe as it was in Volkswagen’s case.