Do you have a paperback version of the owners manual? If you do, go to the index in the back to see what pages CAMERA is found. If you have cameras…all of them should be discussed which would reveal which button to press to actuate a front view camera.
If you don’t have a paperback owners manual…check to see if your version of iDrive has an embedded version of the manual. If you do, it may also have a keyword search feature.
Good luck.
Ditto the post above…do you have the front side view cameras & button? Its the button on the far right in the pic below (#7):
If you do have the button above, then you should have the cameras on each side of the front bumper just above the amber reflector in the pic below: