German chancellor-in-waiting Friedrich Merz reached an agreement with the Greens on Friday on a massive increase in state borrowing, just days before a parliamentary vote on the issue, a source close to the negotiations said.

Under Germany's constitution, Merz needs a two-thirds majority to get the changes passed. With the support of the Greens and Social Democrats, he should succeed. Urgent motions by both the AfD and the Left to challenge next week's sessions of the outgoing parliament failed at the constitutional court on Friday, enabling the vote to go ahead.

BERLIN (Reuters) - German Chancellor-in-waiting Friedrich Merz was set to make a last-ditch attempt on Friday to convince the Greens of his plans for a massive increase in state borrowing to bolster defence and infrastructure ahead of a parliamentary vote next week.