Since swapping to the 63 in my coupe I done away with the a/c which leaves a big round a/c switch in the dash.I pulled the switch out removed a little spring so it is now push on release off,rewired the starter to it and someone with a steady hand could engrave a symbol or just a big S or starter on it, paint white and there you have it an in dash starter button that looks factory fitted.I suppose someone has already done this if not here you are.