As it looks like the Red Bull and Renault partnership is well and truly broken. Red Bull won't use Renault in 2016 What next for Red Bull? Mercedes for racing reasons and due to the fact Mercedes and Renault road cars have a massive engineering partnership that route seems well and truly closed. Mercedes Board Rejects Red Bull They have Ferrari and Honda (which would be ironic if that was their only choice) to cajole into supplying engines and also I presume Toro Rosso will need a new engine as well if Renault buy Lotus and just supply themselves or pull out altogether. How the mighty have fallen. I can't see anything but a Ferrari but would they want to be potentially beaten by Red Bull, I doubt it. What a mess.