- Decrease trim has a 7mm screw and T20 screw. Remove and pull down really hard. Not necessary to get rid of lower trim for 2018's. LowcountryMustang mentioned: I may be missing it but I can’t look to find a way with the digital dash to Screen the MPG readout https://chanceddupp.blogs-service.com/62933082/top-new-edge-mustang-digital-dash-secrets