If you are in need of removing an air tank to gain clearance for the purpose of installing a frame component, the new fittings require an air line fitting release tool. The release tools are available to order from your Volvo dealer and are available in plastic (kit part number 85152447) or metal (kit part number 88800414).
To assist you with the new air line fittings, attached is a Design and Function document of the new air tubing and fittings.