- Decreased trim has a 7mm screw and T20 screw. Take out and pull down tough. Not needed to remove decreased trim for 2018's. LowcountryMustang reported: I is likely to be missing it but I can’t seem to locate a way for the digital dash to Screen the MPG readout https://daltoncknrs.mdkblog.com/37673960/the-fact-about-mustang-digital-dash-upgrade-that-no-one-is-suggesting