There are 2 marks at the bottom. It should be between those 2 marks.
Also read http://www.myturbodiesel.com/1000q_how_to/a4/newowner.htm to see what other catchup maintenance and VW quirks you should check.
Also read http://www.myturbodiesel.com/1000q_how_to/a4/newowner.htm to see what other catchup maintenance and VW quirks you should check.