- Decreased trim features a 7mm screw and T20 screw. Take away and pull down hard. Not required to take out lower trim for 2018's. You simply want to switch your switches. There’s an incredible youtube tutorial by CJPonyParts on getting rid of the wheel and replacing switches. Which is https://collinvoziq.blogtov.com/12393020/5-simple-techniques-for-mustang-with-digital-dash