1999 Volkswagen Beetle oil level

On the image you will see a yellow oil dipstick (closet to the hood latch mechanism).

Remove the dipstick and wipe the oil off of it using a rag or paper towel.
At the end of the dipstick you can now see the "ADD" and "FULL" marks.
Reinsert the dipstick.
Remove it again and look at the end where the "ADD" and "FULL" marks are. Notice how far the oil comes up on the stick.
If it is at the ADD mark, put one quart of oil in.
If it is at the FULL mark, you're good and it doesn't need any oil.
If it between the "ADD" and "FULL" marks, add 1/2 quart of oil.