JAGO

Hi all, New to the forum, and just recently aquired a Berlingo from my dad (now he has purchased a jag) so ill be using it for general shifting of things and getting to work and back. (now i can keep the miles down of my Focus ST) its a 54 plate Berlingo Multispace in Silver, Diesel. Couple of things.... My Dad mentioned that the RAC (i Think) told him about not to let the fuel in the tank get below a quarter full as it can damage the fuel pump... how true this is i don't know... (one of the reasons i came on here to see if it was just pure BS) The other is apparently the rear hatch likes to fly open if it isnt locked ? but this has never happened to me whilst using it. any other little snippets i need to keep my eye out for during my ownership would be greatly appreciated. Cheers JAGO