A few months ago I had a "suspension error" warning pop up, I shut It down and re-started, the warning never came back.
Then a while later, if I manually selected access mode it would indeed go down but it immediately went up in to off-road mode but it was intermittent but progressively got worse and started doing it all the time, so I took it back to the Dealer and they diagnosed it to be a bad compressor. So they are going to swap it out.
I might get it back tomorrow or Monday and will see how it goes.
I'm just posting this for future reference in case anyone ever has the same problem in the future.
My Sport is around 18 months old with 7600 miles on the clock.