are two interpretations for the S-series:
Two-seat trainer based on
Me-109S (Schule) was a projected conversion of the Me-109E from 1940.
There was little official interest from the Luftwaffe. Only in 1942 was
there a need for an advanced training aircraft. This lead to the
development of the G-12 trainer.
Version with blown wing
order to improve the handling characteristics at low speeds trials were
undertaken with pressurized air blown over the wings. This was first
tested on the V-24 which was produced at Caudron-Renault near Paris.
From these trials the S-series was developed. A S-0 aircraft was almost
ready when the Caudron-Renault factory was captured by the Allies.