Verified answer

Yes there are:

Here is a link to the route plan and timetable. I don't know how your spanish is but click on the "esquema y horario" buttons at the bottom. The bus takes you to Conde de Casal in Madrid which has a metro (circular line) that you could then catch into the centre. The bus fare is 4,20 euros each way.

http://www.ctm-madrid.es/servlet/RedTransServlet?x...