@496sbc That is still thankfully true of many of us but unfortunately the manufacturers of cars and many other goods make it virtually impossible for an owner to carry out any but the simplest maintenance and repairs- and sometimes make any repairs impossible full-stop.
On some cars now, you can't even change a failed lamp at the roadside, because it entails removing major bodywork parts. I regard that as not only poor practical design, but so wilfully obstructive to keeping the vehicle fully legal that it should prevent the model gaining Type Approval in the first place.
