After changing the coolant, I accessed the hidden OBD II menu on the dashboard to closely monitor the coolant temperature (TEST N. 07)

http://www.xoutpost.com/articles/x5/e...us-bmw-x5.html

But I noticed my coolant temperature (KTEMP) was running at 100 degrees Celsius (212F)!! That's water boiling temperatures!! But the needle would always remain in the middle. Drove the car around and it would stay at that temperature constantly. It would probably dropped 3-4 degrees if I accelerated hard, but then it would quickly rise up back to 100F. Outside temperature was 40 F. No difference between stop and go traffic or highway driving. I checked the coolant to make sure it was properly bleed (including the heater core) and it all was fine.

Took it to the dealership and they said they run a diagnostic software and run it for 55 min and everything seemed normal. Electric fan would come off and on as expected.

I accessed the menu on my E39 M5 and then on my E46 M3 and drove them for 150 miles each, and they both run between 79 - 80 F. Same ambient temperature.

Can you guys check yours to see if that is really normal?

Thanks a lot.