The egr is on the exhaust manifold. i'm sure there's a tutorial on difflock about it also. You don't need to buy anything, I just took it off removed the gasket cut a blanking plate in the same shape as the gasket and put it back on with the blanking plate between the egr and the gasket. The sedimentor is at the rear underneath attatched to the chassis. I think the poster is refering to veg oil! (svo)