You have a few options. Easiest thing is to do a YouTube search for how to access the hidden guage menu. There you will be able to see how hot your car is running in Celsius. It should be around 94-96.
Second option, and something you should plan on doing, is going into the coding section and reading my thread about how to reprogram your temp gauge so it's actually useful.
Sent from my iPad using Tapatalk HD
2005 BMW 330i ZHP 6MT. Built 11-19-04. Bought 4-2012.
Stock: Nav, leather, PDC, Xenon
Added by me: OEM Alarm, OEM heated seats, OEM aux kit, OEM Bluetooth, intravee, M3 strut brace, BMW Performance Intake, Nappa leather arm rest, updated LCM (triple blink, euro hazards, trifecta lighting, 3 stage brakes), temp gauge