While eating dinner I thought about this and decided to re-run the tissue test. I started with the car off, to see if static was what held the tissue in place - I couldn't get it to stick. Then I started the car and kicked on the ACC and the paper stayed against the grille, when I shut the car off the paper fell to the floor. That tells me the fan is drawing air across the sensor, so the sensor must be dead or dying.
I looked through FastLane but couldn't find the part, did a search in PartsShop for "thermistor" and came up empty. Anyone know the part number for the interior temp sensor on a 560SEL?
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.