Right here goes,had a good luck through the search but can't really find anything definitive. When i bought my 4.8is it had side damage and was sat very low due to being stood for a long time,or so i thought. So we could work on the car i had a friend of mine who has the GT1 raise the car on the air suspension,all four corners came up nicely,the following day the front of the car was back on the floor,the rear stayed at the correct level.
We investigated the front end and found the left air spring to be shot. I replaced both front springs with the Arnott replacements and had my friend recalibrate the system.
We set the car at the 708mm (ish) and all was good,the car drives fine and the air compressor kicks in when getting in the car etc.
This afternoon the SLS inactive light came back on and i have not heard the compressor for a while,the car still drives fine,not harsh or bouncy like some have experienced and the ride height has not altered.
Can anyone help as this situation is terrifying me and i have to have the car ready for a holiday in about 12 days.