  In this paper we study deformations of $C^*$-algebras that are given as
cross-sectional $C^*$-algebras of Fell bundles $\mathcal{A}$ over locally
compact groups $G$. Our deformation comes from a direct deformation of the Fell
bundles $\mathcal{A}$ via certain parameters, like automorphisms of the Fell
bundle, group cocycles, or central group extensions of $G$ by the circle group
$\mathbb{T}$, and then taking cross-sectional algebras of the deformed Fell
bundles. We then show that this direct deformation method is equivalent to the
deformation via the dual coactions by similar parameters as studied previously
in [4,7].
