Actually s-400 contract was political more than military because it was a pressure tool on the us over northern Syria issue according to bolton so it means
Northern Syria question resolved = s-400 crisis over
The only thing germany could do is to cut spare parts and components it produces especially iris t missiles but would not veto the sale of ef 2000 since its not the leading country in the eurofighter program
Hermes 900 has been in service with RMAF since 2017 and have EW capability
"The Hermes 900 has also been selected by Brazil, Chile, Mexico, Colombia and Morocco and will soon enter service in Switzerland."
http://psk.blog.24heures.ch/tag/hermes+900