1977
The Rover 75 has a cheerful little temperature gauge with a sunny, optimistic attitude. He'll tell you everything is fine and dandy in engine land, right up to the point where it reaches critical mass and does a China Syndrome. However, you can display the real temperature direct from the sensor by careful tapping of the trip reset button: With the engine running, press and hold the button After a few seconds, the number 1 will appear - tap the button to advance the number to 19 After a second or so, Test will appear - press the button again Now tap the button until 7 appears After a couple of seconds, the true engine temperature will be displayed To remember this, I think of Star Wars - 1977.