I think I was a bit lucky in this regard. My D3 is 7 years old, but I suspect the most off road it has done has been dirt roads and a few paddocks. Consequently I found the compressor was still quite shiny and new looking.
I've read threads on other forums where people have had to cut the pipes, but one person mentioned spraying them with some sort of penetrating oil, after blowing dust away with an air line.
Can someone explain what keeps the car at normal height, when the compressor has been disabled (fuse removed) or even completely removed from the vehicle?

