A rigid body structure - almost three times stiffer than that of its predecessor - and an all-new suspension layout are key features of Saab's new 9-3 convertible, unveiled at the Geneva motor show on Tuesday. The new convertible includes a supplementary so-called "ring of steel" reinforcement linking the front, rear and side structures, helping to compensate for the loss of structural rigidity due to the absence of a roof and also improving ride refinement, handling and crash-impact resistance.