525d F10 engine coolant temp check

[balfron100]

Hi,
Is there a test or secret menu that provides the coolant temp info, at what temp should the radiator fan come on, never saw mine coming on and wondered if there's a problem.
The 525d F10 2010 only has an engine oil temp gauge, no coolant temp gauge.

Also the radiator has flap covers on the front , how and when do these open and close. I have not saw these flaps open so the radiator dose not get through draft when the car is moving.