Super-stiff airmatic damping - Help please!

[Alex5000]

Bit of a thread resurrenction, but did you ever get to the bottom of this OP? I have an identical issue on my S211.

Ressearch is suggesting the AIRmatic module has gone bad.

 

[grumpytosser]

also interested in this as im sure my s213 is the same but i cant find anything to compare it to