Norbert Röttgen, a member of Chancellor Angela Merkel's Christian Democratic Union (CDU) party and chairman of the parliamentary foreign affairs committee, said it was "completely obvious" that Germany should not provide the upgrades.
He told BBC Radio 4's World Tonight programme the intervention by Turkish forces was "illegal, contrary to international law and counter-productive with regard to fighting ISIS".
Mr Röttgen praised the US for speaking out against the Turkish offensive, saying: "The Americans are the only Nato allies who are clear about what is happening. We quite often criticise the Trump administration but at this point they are more clear and more courageous than the others, and we should follow."
http://www.bbc.com/news/world-europe-42795943
