Hello Den!

In "Suche" you type in the search word and then you find every post with this word.

I do not know if searching by Post number is possible.

The view you can change in
"Mein Benutzerkonto" =>
"Haupteinstellungen" =>
"Darstellungsoptionen" click on "Ändern" =>
"Anzeige der Nachricht/Antworten" swap to
"Flache Darstellung".

Gude Mario Audi 100 CD Autom. Bj.83 Audi 200 20v Bj.89 Audi 5000 Bj.85 Audi V8 3,6 Autom. Bj.88