All you need is a switch and a simple rule:
Switch ZOE_ac_start "Klimatisierung starten []"
rule "Klimatisierung starten"
when
Item ZOE_ac_start received command ON
then
executeCommandLine(Duration.ofSeconds(5), "curl","-d","POST","https://zoe.yxyxyxyxyxyxy.net/?acnow","-H","Content-Type:application/json","-s","-H","authorization:Basic ababababababababab")
end
Again, the Renault servers have issues sometimes, it may not work for a couple of days and always check the MyRenailt App first before doing some testing in openHAB.