The stereo lights on my 2005 TT V6 do not come on unless I push the stereo face panel in which case they light up and stay on but the next time I start the car i have to do the same again or the lights not not come on. Any ideas of a fix? If it needs replacing is it possible to fit an aftermarket stereo (to get bluetooth phone and Ipod connection) without issues with the ECU etc? The car has Bose with amplifier.