Hello, I completely filled my C3 with diesel the other day but am hoping to part exchange it for a new car. I don't want to give them all that fuel, so is there an easy way to siphon or otherwise remove the diesel? I tried to insert a hose pipe and although a good 3 ft or more went ion, I think it hit an obstruction and would not reach the tank. Is there something in the filler to prevent hoses reaching the tank to prevent theft? Thanks.