your total miles and trip miles take a regular instument cluster bulb, you`ll have to order from dealer or online source. the bulb for outside temp can be had at radio shack, part #7219 micro lamp 12 volts, 60ma, get a few extra cause they can be used for different things on audis. re heat: possible heat valve or heater core? Andrew Batie 97 A6qa 88 80q 90 90 parts car