Hi all

So I recently bought an e70 08 X5. I have taken advantage of euro car parts 50% off sale to buy all filters and new engine oil. As the service history was abit pore. Bit mentioning the on board display was saying engine oil over full. So 7.5lt Castrol later only half way up the dip stick and...... The faults still there! Why? Do the 08 e70 have a level sensor? Or do I have to reset somethin? All ideas would be brilliant.