05 RRS sitting high on one side

[5MUG]

Hello
I have an 05 Rr Sport. Its booked in to garage on Monday but I wondered if anyone can throw any light on what is wrong. The RHS rear wheel is sitting high and just wont go down. I have played with the suspension button (up and down!). The whole car goes up ok but when I lower it the RHS rear stays up! It stays the same when being driven.
Any clues? Is it going to be expensive?
Thanks S

[ilaishley]

Air suspension exhaust valved seized. No idea on cost.

Ian

[kman]

faulty ride height sensor

[5MUG]

Thanks guys! I'll update on Monday!
S