Mozart’s String Quintet in C minor, K 406 is the composer’s own arrangement of his Wind Serenade, K. 388, for two oboes, clarinets, horns and bassoon, written in 1782. It is mentioned by Mozart in a letter to his father on 27th July in that year, described as Nacht Musique but is not in the form or mood of a Serenade.
The later arrangement was presumably designed to be advertised with Mozart’s Quintets K. 515 and 516 on 2nd, 5th and 9th April 1788 in the Wiener Zeitung, where they are announced as ”schön und korrekt geschrieben” (Beautiful and correctly composed)
Here is the delightful outcome for your enjoyment: