we have 550 not a 707 so maybe the same depending on when yours was made
RH side of steering whee push "home" button then use centre silver toggle to roll down the menu from trip to navigation etc till u get to service then push in and tires and oil will come up as options
Hold the volume knob + tune/scroll knob together for 10-15 secs until screens reboot. That brings the missing Service tile back. Then with engine warm, idling, on flat ground flick to Service using the right steering wheel controls. Oil level and tyre pressures are in there.