Installation of a Pioneer DEH-P4100SD! Question about installation and adapter

Hello everyone! I will soon get a Dacia Sandero 1.4 MPI with 75hp in the basic version, which will be my first own car. My question would be an adapter for this radio? I already asked MediaMarkt and the seller said, “Yes!” and I have now seen in a photo what the radio pre-arrangement looks like. (link: http://www.dacia-logan-club.de/…/…ionachruestung-basisversion.html) a little further down. Now I am irritated because of the loudspeaker. Is there any need for another adapter? I already asked in the car dealership and the seller said, “I could offer you for 300€ to install two loudspeakers and a radio!”, but I wanted to install four loudspeakers. Only I want to have only two now and have already played with the idea of giving it this order, only I want to have the radio (called above) and the loudspeakers, which I have already looked for out (Pioneer TS-A130Ci), installed. I If the seller says no to this, he would even install it himself. And if I put it in myself, how do I get a connection for the loudspeaker cables that are sitting behind the panel somewhere? Can you help me any more? If you think of any other problems or what makes the thing more difficult, I would ask for further support. So the speakers should fit, because at Pioneer there was such a model selection and the Dacia Sandero below Thank you very much! The anticipation with me is RIESIG!!