I have recently been playing with Vegetable oil as a fuel.
I had some experience with my XJ600 Diesel bike. That was fitted with a Yanmar L100 clone, which is a direct injected 400CC single cylinder diesel. That type of engine is not ideal for running on vegetable oil, as fuel gums up the rings when it hits the cold cylinder walls.
I recently picked up a 2002 E55 AMG that has a bit of accident damage. The bonnet was dented, the fan housing was cracked and the fan grill was broken. Additionally, the poly v belt that runs between the individual fan blades had disconnected.