When the Gaydon based car maker revealed the news of their partnership with Mercedes Benz, they said that “The deal will see Aston Martin access significant Mercedes-AMG GmbH and Mercedes-Benz Cars’ resources, allowing the development of bespoke V8 powertrains and the use of certain components of electric/electronic (e/e) architecture.”
Aston Martin has already confirmed that they are open to manufacture an SUV under the Aston Martin nameplate, rather than the recently resurrected Lagonda. The first SUV under the Aston Martin brand could be seen as early as 2017. The V8 which will power this SUV, might be developed in association with AMG. Once launched, you won’t see any Mercedes or AMG badging, as the British brand would want to keep the partnership ‘subtle’.
On the other hand, at the V Class launch, Mercedes Benz’ Dieter Zetsche has revealed that they are open to help Aston Martin in this regard, with their GL platform. Earlier too Aston Martin had tried to enter the SUV segment, but probably a suitable platform was not available. With Mercedes and AMG, Aston Martin surely has a better chance. (source)