You need a CPL or ATPL to get an MCC.. It cannot be done on a PPL.
Lasseb, you are misinformed - there are actually
no pre-requisites in either JAR-FCL or Part-FCL for entry into MCC training. However, MCC training is
intended to be either for students attending an ATP integrated course or for
PPL/IR or CPL/IR holders who wish to obtain a first multi-pilot type rating. [JAR-FCL 1.261(d) refers]
You do need to have passed the ATPL exams to obtain a multi-pilot aeroplane type rating but you do not need to hold a professional licence.