- Decreased trim contains a 7mm screw and T20 screw. Remove and pull down tricky. Not necessary to take away lower trim for 2018's. So Indeed you may get the heated wheel SCCMs and add the heated wheel later. Or you can obtain them and never add a heated wheel. https://bersatpr9forsale77888.blogminds.com/2015-mustang-gt-digital-dash-secrets-29417539