My problem relates to a '96 328i but hopefully you can draw from your obvious expertise with the E39. My climate control (digital display) goes dim-bright-dim-bright at seemingly random cycles and random times (most noticeable for obvious reasons at night.) This is an intermittent problem but the display does this about 70% of the time. Any idea what's going on here? Any items I can check for shorts, etc? Dealer has no idea, but it's out of warranty anyway. TIA.