I have today finally managed to get my radio working in another of my cars. not an Avantime but so impressed was I by the help I received from Davidson Electronics I had to post a message. The radio was locked after ten attempts at the wrong code and Graeme spent a disproportionate amount of time with no promise of remuneration researching how to unlock it.
I don't normally allow blatant advertising on this site, however, if anybody needs a radio unlock code or similar please do me the personal favour of using http://www.davidsonelectronics.co.uk