I also found a handy site worth looking at for anyone else attempting this upgrade. If you type " x type sat nav retro fit " into google the first one on the list should be called " untitled document " and this is a step by step guide with pictures . Just out of interest riz, did you have to upgrade the wiring loom of could you just plug it straight in? ps i dont really need the sat nav but i really want digital climate and digital stereo and the jaguar screen saver gives the whole dash a more modern look. Thanks once again