Aftermarket CID?

[memati]

I just got a 2005 X3 3.0i without nav/or CID. My question is that if I can install a CID on the dashboard without the nav unit? All I need is the LCD display on the dash (just for fuel consumption info) If this is possible, how can I connect it to the car? I have the retro nav installation document but I just want to make sure if I can do this without the nav unit. What the total cost would be for used items?

Thanks.

[trapdoor]

You need something to 'drive' the CID display. This can be either the Navi computer or a BMW Video Module. The 'radio' has nothing in it to drive the LCD and you would just get a totally black display.

For the cost of a 2nd hand Mk4 on ebay, surely that would be the sensible route? The CID radio can be bought off ebay too.