one of the first things i did was upgrade the headlight globes, just off the shelf '40% brighter' narva ones, they did make an improvement.
my tonneau has been fine and i've stretched it a fair bit on a few trips too, still all good after 15 months ownership.
weird about the brake pads, i don't wash mine too often but the wheels are definitely not black, they get a light dusting but certainly not bad at all.
fuel economy improved in a big way from about 25,000km onwards, it's now very very good at 38,000km
To be honest it's been a great car, very happy with it, i do regularly wish i'd gotten a second hand 4.2 or 4.8 patrol just for the extra off road ability and solidarity but i can't really fault the d40.