Volkswagen Golf GTi : removal and replacement of headlamp bulb on (UK) offside requires the front bumper to be detached and lowered to allow the lamp unit to by moved forward (there is insufficient room behind it). An hour's dealer labour. As an alternative, get the version with Xenon lamps - then you have to remove the bumper and lamp unit entirely, three hours' dealer labour. And no, the special tool required to remove the bumper is not commercially available!

I can't say I mind the small indistinctly-labelled buttons on home stereo equipment too much - you get used to the major operations quickly. What gets me is the stereo systems where the buttons are even smaller and even more indistinctly labelled, which are "designed" for use in the car i.e. for operation by feel alone without taking concentration from the job of driving.