Just in relation to my above question, i didnt get any feedback from this of where the above resistor was located, i done a quick search under the dash and located it simply in the passenger footwell, up in the corner under the lower pocket, simply above the small cover thats under their. its held on by two small bolts and their is a connection going in. I took off the resistor and noticed it rusty and cracked, meaning that was the reason my heater would not work on number 1 - 3 . I purchased another resistor pack on ebay, it was off a VW Polo 2001, but it had the same part number as the Lupo, it fitted straight on. simple job, took 10 mins. Hope this helps others who have the same problem of the heater fan not working on number 1 - 3. The part cost 12 pound, buy second hand. The part number is 1J0 819 022 A.