The automakers heading for Europe's biggest annual car show are already suffering from the ongoing trade war between Washington and Beijing.
He says Daimler is open to talk if there are concrete topics and it’s a win-win situation.
Beijing had raised tariffs on US auto imports to 40% in July, forcing many carmakers to hike prices.
The bloc will likely ignore pleas regarding the next set of proposed reduction targets.
The decision by Trump's Environmental Protection Agency means the emission standards for vehicles in the 2022-2025 model years will be revised, as sought by automakers.
President Donald Trump's pledge on Thursday to impose hefty tariffs on steel and aluminum imports raised the prospect of a global trade war that could weaken a healthy US economy that is poised to deliver record corporate earnings.