Reuters quotes Sandford Bernstein analyst Max Warburton who believes that the firms are discussing: a "much wider and formal level of co-operation across products and technologies. Sources report Ghosh is trying to persuade Zetsche to join the Renault-Nissan Alliance, via an equity investment or swap, while Zetsche would prefer a simple joint venture." Reuters thinks the tie-up would make sense: "Renault-Nissan lacks top of the line cars, despite attempts with the Safrane, Vel Satis or Korean-built Samsung models, while Mercedes seeks smaller cars beyond the A-Class and Daimler's Smart vehicles."