BERLIN - Media reports on Saturday said the head of Italian carmaker Fiat SpA, which is in the process of acquiring U.S. automaker Chrysler, is continuing talks with German officials about a possible takeover of General Motors' Opel unit.

The Sueddeutsche Zeitung newspaper and Focus magazine cited unidentified sources as saying Fiat CEO Sergio Marchionne expects to meet Monday with German Economy Minister Karl-Theodor zu Guttenberg and Foreign minister Frank-Walter Steinmeier to present a concept for taking over Opel.

There was no immediate confirmation from the German government.

GM has been trying to find investors for its non-core and nonprofitable assets as part of a restructuring in which it has sought billions of dollars in aid from the U.S. and Canadian governments to avert its collapse.

Opel has said it needs 3.3 billion euros (US$4.3 billion) to get through the economic crisis, while the German government has said it doesn't foresee giving direct state aid.

Chancellor Angela Merkel has suggested the government could help an Opel investor with loan guarantees.

Several suitors have been reportedly interested, with Fiat and Canadian car parts maker Magna International Inc. two leading the way.

Magna already on Tuesday presented Guttenberg with what the minister called a "rough concept for a commitment with Opel."

Guttenberg has said the German government would wait to determine its role in any full or partial Opel sale after the U.S. government had also weighed in.

Fiat, meanwhile, has pressed ahead with a takeover of Chrysler, with lawyers for the U.S. auto manufacturer saying that the company would file a motion Saturday to sell substantially all of its assets to the Italian automaker.