well it works perfectly when its around 40 degrees in the morning, but as soon as it heats up inside the car the digital readout goes away

Since the instrument panel gets driven by the footwell module, my first recommendation is to check the connectors at the footwell module to ensure good contact. 

Then have the software re-loaded or re-flashed into the footwell module. We have had reports of strange electrical gremlins in the dash get corrected by a software re-flash - it seems the software gets corrupted for whatever reason.

Good question: my Suzuki has a similar problem with the radio. The display is fine when it is cold out (winter cold) but as the car warms up, it fades away.

my 07 and 10 cooper s both have digital readout displays that are bad or going bad, the 10 starts good then as the car warms up it goes away, the 07 doesnt even come on, is there a way to fix this, or does someone know someone who repairs these ?, hell I dont even know what radio station it is on.....much less any information