I also have a 2018 Tradesman. The volume up and down and tuning up and down switches go on the back of the steering wheel. Not having those switches means you have to reach over to the radio every time you want to change the station or adjust the volume. The Tradesman doesn't come with those switches, but you can add it as Factory Parts which I did because I was missing them after having them in my last Ram. You need the maestro harness to allow those switches to work and also to allow your data ports to work. I highly recommend hitting Benny up at all Mopar Parts, he is a vendor and can get you the correct back bezel of the steering wheel plus the cable. Once the steering wheel is off it is a pretty simple Plug and Play action. For what it's worth, I actually got a 8.4 uas radio out of a 2019 RAM and install that. I also purchased a harness from Mpgrimm2 another vendor here. This allowed me to have the backup camera in both my mirror and on the radio screen. Good luck