Thanks for your quick response!
1) So this is really not possible? Not even in the code? However, in some other fields did I succeed?
If they remain mandatory, can I convert them to a text field? Then the admin can simply type in the maker and model himself. Still a lot easier.
2) I was able to change everything via the language settings, but only these buttons at the top remain in English. Do you have an idea where I can change this?
3) Ok thanks I send a message to have this rental part removed.
Thanks!