I have recently purchased a Discovery 4. The hand book's illustration was not very clear on how to use the diesel mis-fuelling protection device (I have figured out how to use it now). Anyway, on my second attempt to use it in the fuel filler neck, the teeth on this device broke off. Will this be an issue if these platic bits got into the fuel tank? Or do I need to have someone to look at getting these bits out of the fuel tank? Thanks.