Why am I getting a reduce oil" message when we haven't added any oil? on 2000 Mercedes-Benz E320

The problem occurs while driving?

Asked by for the 2000 Mercedes-Benz E320
possibly overfilled
1 more answer
You can get a false reading if there is some type of contaminate introduced to your system. Try changing the oil and filter that might help. This comes straight from my manual had same problem.