Same as some of the new cars when you have to replace a headlight bulb. On some models half the engine has to come off. Makes a mockery of having to carry new bulbs, as you have to on the Continent. Still need a workshop to fit them!!!
Least on our tractors, we can do most maintenance jobs fairly easily.
Have you ever tried to change the headlight bulbs on a Mk2 ZS??? Skint knuckles all round
Done that, even managed to get main beam bulbs upside down, and thanks to Ritchy advising why my lights were picking up the tops of trees a mile down the road, sorted them.