MUNICH (Reuters) -BMW's CEO said on Friday he was optimistic that the European Union and the United States would soon reach a "manageable" agreement on auto import tariffs, potentially including a mechanism to offset imports with exports.

Oliver Zipse's comments come as Europe awaits a letter from the U.S. administration under Donald Trump that could outline the framework of a trade deal and clarify tariff levels on European automotive exports. Trump said on Thursday the EU could receive a letter on tariff rates by Friday.

"I'm optimistic that there will be a manageable outcome but we have to wait for the result," Zipse told journalists at a company event in Munich on Friday.

He said a possible "netting mechanism" could be part of the deal, allowing exports from the U.S. to offset imports. BMW stands to benefit from such an arrangement, as its largest production site is in Spartanburg, South Carolina.

The mechanism could be based on the value of exports out of the U.S. market - more than $10 billion in 2024 in BMW's case - rather than the number of exported vehicles, he said.

If both sides were to agree on such a mechanism, it could also benefit imports of auto parts, according to people familiar with the matter.

"We have an important point because we are the largest car exporter in the U.S." Zipse said, referring to the 225,000 cars it exported out of the country in 2024.

Hefty tariffs on car imports to the U.S. have left European carmakers scrambling to respond while hoping for a deal to minimise their impact in talks between Washington and the European Commission.

Sources told Reuters earlier this week that Brussels had proposed a package of measures to ease the pressure, including export and investment credits and mutual reductions in existing tariff rates.