How Do You Check for Engine Oil Leaks on an Audi A4?

I have recently noticed some strange leaking under my Audi A4. I suspect it may be engine oil and I want to check it myself before taking it to a mechanic. Can someone provide me with the steps to check for engine oil leaks on an Audi A4?

To check for engine oil leaks on an Audi A4, first make sure the car is parked on a flat surface. Then, pop open the car's hood and locate the oil dipstick. Remove the dipstick and wipe it clean with a paper towel. Put the dipstick back in and remove it again. The oil level should be between the two markers on the dipstick. If the oil level is below the lower marker, it's time for an oil change.