I have just bought a great 323ci which has a factory fitted small monitor/screen for computer read-outs etc, including TV (+ GPS which has been removed).   The GPS box is now missing from the boot, and the TV was analogue - so it cannot receive any signals at present.	 Is there a simple way of upgrading to digital ( as we recently had to do at home)?   Unless the solution is a simple plug and play, might it be better to go to specialist for advice and fitting?   BMW dealer wanted me to book it in to see what is possible, but I guees any solution from BMW will be arm and leg which I would rather not lose at present!   Can anyone direct me to online help etc?	   I also have 2 DVD/video monitors fitted into headrests, but again the previous owner has removed the video cassette player that fed them................it would be great if I could direct TV signals to them also, but that might just be a step too far??  There are some wires and connectors under the center ski bag space between the back seats.   I am amazed at all the extra spec in this motor compared to my previous Merc C class - which I am more convinced than ever now was pretty boring in comparison.   Surely everyone with pe-digital TV receivers has had this same problem - but I cannot find solutions on this site, and others are non BMW specific.		 Any suggestions please?