The line is the product of two lines, the former Line 8 from  to Nuevos Ministerios and the former Suburbano (also known as Line S) from  to , this section being named line 10 in the 1980s, and formerly operated by FEVE until the management of Line S was transferred to the Community of Madrid.
The line is the result of combining two lines, Line 8 from  to Nuevos Ministerios and Line S (also known as Suburbano) from  to , which was previously designated as Line 10 in the 1980s and operated by FEVE until its management was transferred to the Community of Madrid.