I have installed one of that harness. Your picture shows different layout from mine. But, I think it is the blue one (right side). You can email Jim to double make sure.

Good luck

 

I e-mailed Jim, and he's not sure either. Anyone with V12 experience out there that can help me out?

 

i would say the one on the right as the temp sensor is allways closer to the thermostat for more accurate readings

 

had a look on the EPC - the 'round' plug is for the instrument display, the other is for "temperature sensor, at thermostat; used for automatic heating and air conditioning" part number 008 542 45 17

so you are right, alldata is wrong.

 

Thanks for your help everybody!

 

I want to incorporate Jim F's technique to turn the auxilliary fans on at a lower engine temperature. I removed the left front engine cover on my V12, and saw three sensors. One of them looks exactly like the B10/8 sensor on Jim's web page. But according to Alldata, what I thought was B10/8 is not. See photo...

Are there any Master Mech's out there that can tell me which one is the "real" B10/8?

By the way, here's the link to JimF's great web page...
http://pages.prodigy.net/jforgione/MB_CTS.html

Matching from left to right: first ECT sensor, then one wire gaged and last I think it’s water temp sensor. On my car the two wires are melted and I just test with a multimeter so there’s no current any volts, I’m struggling where does the wires comes from.