Panhard Rod
A rear suspension rod was rattling a bit. Some research finds that it is called a Panhard Rod and is only needed because I have air suspension. the only Iveco part number is for the whole rod, including bushes 504035762 cost £229.38. The rod does not come off without removing the nearside air bag (or sawing the bolt). The bolt was seized in the bush, but fortunately the bushes themselves were sound it just needed tightening up. greased and tightened and other end moved freely but air bag prevented removal.