Range of markings on dipstick:
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 Audi S4, 2008 Audi S4, 2007 Audi S4, 2006 Audi S4, and 2005 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.
a - Oil must not be added.
b - Oil may be topped off.
c - Oil must be added. After topping off, it is sufficient if oil level is somewhere in range - b - (shaded area).
NOTE:
- Oil level must not exceed max. marking - a - and must not fall short of min. marking - c -.