Disco 3 suspension is all adjustable, meaning that it will never be right.
Expect to buy 4 new tyres inside every 20k miles. This is called PROGRESS over the Disco 2 where many owners have the original tyres on at 100k miles.
The settings of Disco 3 rears is completely different between air suspension and not. My chum has one and it is a DISASTER. The suspesnsion at the back was set for the wrong type of suspension ""OOPPS we didn't notice it had coils, sorry about that, pity about the tyres") and does in two front tyres every 12,000 miles or so.
Piece of junk.
CharlesY