How do you know if your C230 is overfilled with engine oil?

To determine if your C230 is overfilled with engine oil, check the oil dipstick. Remove the dipstick, wipe it clean, and reinsert it to get an accurate reading. If the oil level is above the "full" mark, it's likely overfilled. Additionally, you might notice oil leaks or frothy oil on the dipstick, which can indicate overfilling.