I think some things got mixed up here. The puzzle certainly shows an Autenrieth body on a cca 1928 Audi. I am not convinced that it is an Audi Imperator, as usually the Imperator had one long row of louvers on the engine bonnet sides while the Zwickau Typ SS had them separated in groups of four, which I think is also the case here. But besides that open issue the bodywork certainly is not any kind of Aerable. That expression L'Aerable Monobloc was given by its creator, the French coachbuilder Alin-Liautard, to a convertible with fixed window frames, like the German Cabrio-Limousine. The pictured Audi would have been called a Transformations-Cabriolet in German.
Anyhow, there was an Audi Zwickau Typ SS with a Pullman-Aerable body by Autenrieth, but that is a different car, see picture below.
