Hi i have a 04 c-max 1.6 tdci. this last few weeks it seems to be using oil like half a ltr after 500 miles. i have found some oil on top of the engine on a plastic cover but god knows where its coming from..can anyone help? also when should i change the cam belt? just one more thing it keeps going into limp mode and that red cog wheel comes on the dash...no codes come up...cant understand it.now you know why i said in my intro i wish i never got the thing.hope someone can help.