hey everyone, I bought a used 2003 e320. Absolutely love it, comfortable ride, but it doesn’t have the harmon kardon system which means it doesn’t have an aux out. I’ve been looking at upgrading the headunit for awhile to a sony one which features apple carplay. I just want to know if I need a wiring harness, where I can find a wiring harness, and anyother suggestions for headunits or tips that you feel i should know. I live in Canada, thanks for all the help!

Thanks! I’ve been looking all over the internet to find specific details, such as if mine didn’t come with the harmon kardon would I still need a harness, etc.. so i was hoping that I would’ve got some answers. But I haven’t tried advanced search, thanks for the advice!