Thanks guys. I have tried washing up liquid on the bags but no sign of a leak, admittedly the suspension didn't drop whilst I was testing it. Next thing must be to change the bag. What do people think about changing singley or is changing as a pair a must?

My Disco air suspension is making me pull my hair out. I have trawled the boards and feel I know just about all there is to know on these air suspensions but nothing explains what I am seeing. Most times the suspension is fine but perhaps once in every ten engine stops, the right hand rear drops...