RR Ghost diagnostics

[Ozzy997]

Hello

Don't really post on the forum much but here goes,,,,

Few days ago I had a puncture on the ghost has run flats so drove it approx 5 miles to my usual garage who replaced the tyre with a matching good year run flat and reset the the tyre pressure monitor ,

Now my problem is just before the puncture the ride height control has stopped working and the car is stuck in the same position , also I have " cornering ability restricted" light on in orange on the instrument cluster.

I know a bit about air suspension etc so got it up on a ramp and figured out it's not a air strut which is at fault as one corner would of lowered,
Then I checked the air pump which is working fine too .

Any ideas?
Anyone local to me in the Manchester area who can diagnose this other than the main dealer? Or is main dealer my only option?

Thanks