Thank you , yes The car kept dropping and lifting at random moments followed by the “Suspension Fault” warning on the dash . It would do it regularly and then reset. I was waiting for the total failure , as I had with my previous RR Vogue SE which turned out in that case to be a torn bag front near side . With the D3 I’ve ended up with the compressor running on start up very noisily for approx 30 seconds, no lift and the Suspension Failure warning . I’ve taken the awful noise to mean the compressor has had enough. I wasn’t aware of the practice of upgrading to D4 compressors so didn’t think to check which one was under there . I’ve got the repair kit which is required if you have to cut existing pipes but I’m now wondering about the software differences ?
