Fiat SpA (F.MI) said Friday that it won't attend a tentative meeting with German authorities Friday, but reiterated its interest in General Motors Corp.'s (GM) Adam Opel GmbH unit.

In a statement to the Italian stock exchange, Fiat Chief Executive Sergio Marchionne said the Italian carmaker remains "open and committed to continue discussions with all parties involved" in the Opel deal that share a view to find "a stable and lasting solution for the industrial activities of Opel."

In the statement, Marchionne said that Fiat proposed a plan for Opel that will limit the social costs of the integration process while delivering "significant synergies" derived from the sharing of platforms, related components and power-trains.

Marchionne also said that Fiat was not able to perform proper due diligence on Opel activities as it was unable to have full access to the financial records of Opel, and therefore unable to make a proper merger proposal that would be fair to General Motors as the seller and to Fiat.

Citing a "last round of requests," which would require Fiat to fund Opel on an emergency basis while the German government determines the exact timing and conditions of the interim financing, Marchionne said that it was "unreasonable to expect Fiat to provide funds."

-By Sabrina Cohen, Dow Jones Newswires, +39 02 58219906; sabrina.cohen@dowjones.com