My Smart is a 2013 coupe. The first issue it only had odd numbered gears and was put back right by moving shifter back and forth, trying to crank in gear, messing with disabling abs, holding down both buttons while turning key. It eventually goes back to working. Now the last several times have been 1 gear only. No shift at all. Usually 2 gear. So far have been able to correct by shutting down and playing with shifter. What is causing this.