The String Quintet No. 2 in C minor, K. 406/516b, was written by Wolfgang Amadeus Mozart in 1787, a transcription of his earlier Serenade No. 12, K. 388, for wind octet. Like all of Mozart's string quintets, it is a "viola quintet" in that it is scored for string quartet and an extra viola (two violins, two violas and cello).

Date of composition 1788 (1787–88)
First published 1792
Type String Quintet
Tonality C Minor
Catalogue KV 406/516b
Arrangement of Wolfgang Amadeus Mozart: Serenade No.12 in C minor, KV 388/384a "Serenade No.12 ; Nacht Musique"
Instruments Cello
2x Violin
2x Viola
Autotranslations beta Wolfgang Amadeus Mozart: Quintette à cordes n°2 en do mineur, KV 406/516b
Wolfgang Amadeus Mozart: Quintetto d'archi n. 2 in do minore, KV 406/516b
Wolfgang Amadeus Mozart: Streichquintett Nr. 2 c-moll, KV 406/516b