I have just bought a X5 3.0TD 2003 and when i got it all the buttons for the heater were dead, no life whatsoever, i checked all the fuses in the boot, everything ok but still couldnt get it to work, came out this morning and it worked fine all butons fully functional everything working great...... However just got back in it this afternoon and pannel is dead again, any suggestions anyone.

Sounds like the A/C control panel is no good.