Have a 2014 320i I'm working through some coolant temp issues with. Anyone have an image or graphic with coolant temp sensor location(s) shown on the N20? Haven't seen much shown in searching forums and the web. Background, this started with low heat concerns this winter, and the oil temp gage showing somewhat cool. I have already replaced the thermostat (I am currently at 126K !), along with a coolant flush / change. Hidden menu shows coolant temp somewhat erratic in the 60C to 100C range, then dropping off the face of the earth to -100C after a period of time. Throwing P0128 and U1408 codes.