intermittent

I have a starting problem I hope someone recognises and can perhaps point me in the right direction. My wifes beetle a 1.6 petrol convertable late 2004 is having intermittent starting issues. Its been to a VW "specialist" once who said they couldn't fault it. When in problem mode the symptoms...

I have a 2005 vw new beetle, Recently it started to have problems and is going into limp home mode. The engine runs great, the transmission runs great but every once in awhile when i start it i'll get the [P][R][N][D][S] brackets on the bezel with the ses light coming on. It seems to be stuck...