I measured the resistant of the CTS when it was cold and hot:

Cold is 4,79 kOhms, warm is 215 Ohms

The ATS is at cold 4,51kOhms (Tamb= 16 degree Celsius).

To give you an idea how lean the car runs at full boost (greens, 1,3 Bar etc):
at 3000 rpm it says 15,09:1 (1,02)
at 4000 it says 14,41:1 (0,98) and
at 5000 it says 13,82:1 (0,94)

So that it didn't meld anything is a miracle!