normally located above fuel tank the additive tank is filled with eloys fluid via a tube located in the rear nearside wheel arch the arch liner will need to be removed to gain access if you manage to fill the tank which is not easy you will need to get the fault code cleared on a diagnostic machine if your display shows ''diesel additive minimum level''as there is no float in this tank the message is computer generated after a certain number of miles are covered normally 60-70000 the particle filter will probably need cleaning as well
