can someone please help me?
If your head unit has an aux input then all you need to do is get the right cable to connect the output from your ipod (3mm pin, I think) to the aux input. The aux input is likely to be either a 3mm pin, or a twin (left/right) RCA/phono socket.
A brief google has led me to believe that there may be different versions of your head unit available, some with an aux input socket and some without it. If you’re in the latter camp, then you’ll need to get a new head unit or a radio transmitter device thingy