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BRUSSELS — Google should be blocked from expanding into making goods like cars and televisions, the European Union’s nominee for digital economy commissioner said over the weekend.

The nominee, Günther Oettinger, a fellow German and political ally of Chancellor Angela Merkel, suggested that American technology giants like Google threatened to reap the rewards from developing innovative products, consigning European businesses to delivering parts and services.

‘‘It must not happen that Google makes future products such as cars or televisions and that European companies are left in the role of suppliers,’’ Mr. Oettinger said in an interview posted on Sunday on the website of Welt am Sonntag, a German newspaper.

If confirmed as commissioner for the digital economy, it would be within Mr. Oettinger’s scope to propose Europe-wide rules affecting Google in areas like copyright, online privacy, Internet governance and mobile telecommunications. His remarks indicated that he shares the widespread sentiment in Europe that the power of American technology companies must be curtailed.

‘‘Companies that are up today can already be gone tomorrow,’’ warned Mr. Oettinger, who said he was concerned by the competitive threat posed by big companies like Google. ‘‘Think of the loss of importance of Nokia or of Siemens in the category of mobile devices,’’ he said.

Mr. Oettinger was referring to the Finnish handset maker Nokia and to the German engineering giant Siemens. They have seen their prominent positions in mobile phones decimated in recent years by the rise of competitors like Apple and by phones powered by Google’s Android operating system.

The comments amounted to more evidence that Google is likely to face unprecedented regulatory scrutiny by Brussels during the next five years, including in areas of its business still under development. Powerful German and French publishing groups have played lead roles in successfully seeking to delay a proposed antitrust settlement between the European Commission and Google over the company’s dominant position in online search and advertising in Europe.

Mr. Oettinger, who has served as the European Union’s influential energy commissioner in the last five years, must still be confirmed as a member of the incoming European Commission by the European Parliament. Hearings for all of the nominees to the commission’s top jobs were expected to be held in the coming weeks.

Despite the potential scope of Mr. Oettinger’s digital economy portfolio, if he is approved for the job, there will be limits to his authority. He would be part of a team of 28 commissioners, and his work would be overseen by Andrus Ansip, a former prime minister of Estonia who has been nominated to serve on the commission in a supervisory capacity as one of several vice presidents.

Mr. Oettinger, moreover, would not be in a position to directly influence how the bloc’s far-reaching antitrust laws should be wielded against Google or other companies. That would be the job of Margrethe Vestager, a Danish politician nominated as the bloc’s next competition commissioner.

Google on Monday declined to comment on Mr. Oettinger’s remarks.