Where is the thermometer?
 

My temperature readout at the bottom of my W126 instrument cluster is broken so I want to replace it. I popped out the dash and naturally there are a million wires back there....so which one of those is the thermometer unit? I don't want to mess anything up! Also, since I have a euro car and it obviously originally read in Celsius, will a US Fahrenheit unit hook right up and work? Or can I only replace it with a C unit?