I have a 96 audi a4 quattro and I am looking for the climate control unit for the car. I purchased one without matching up the part numbers and everything works correctly but it will not engage my compressor for my a/c. The part number I need is 8d0820043h. The unit i purchased has a date of 12/98 so im assuming its for a facelift A4. If anyone has one of these units how much shipped to 26105...Thanks