BMW E90 hidden menu and viewing engine temperature
How do you open the E90's hidden menu?
Switch the ignition on or start the car and hold the trip reset button down for about 10 seconds until menu 01.00 opens. You move around the menu by pressing the button: a longer press moves to a submenu and a press of about 10 seconds exits the menu.
Where can you see the engine and coolant temperature?
Temperatures are at item 07.00 of the hidden menu: coolant and outside temperature are shown there. The engine temperature cannot be seen in the iDrive menu. In some newer diesel models (320dA LCI) the temperature display has been replaced with warning lights.
How do you unlock the hidden menu, and does it stay unlocked?
Some items, such as 19.00, are locked. The lock is opened by entering a code that is the sum of the digits of the last five characters of the chassis number. The display then reads Lock off. The unlock does not persist between starts, and it has to be done again every time after the car has been switched off.