Multiecuscan

I ask you experts where I can find the reference parameters of the manufacturer.
I think it's important, in case I have to adjust an injection or a voltage, to have the real parameters to which that component should work, so as to understand if it is working well or not.
I have a Lancia Musa 1.3 MJ of 2007 (199A3000) I ask you to know, before buying multiecuscan, which software I should buy and which specific connector for my car ?

Thank you

Look here:

http://www.multiecuscan.net/SupportedVehiclesList.aspx

Search for Lancia Musa 1.3

Here you will see what is required. An ELM or OBDLink with adapter A1 seems to be all that is required PLUS the basic MES software license.