oil pressure,release oil pressure

What is your question?

i have a 2002 mercedes benze c230 yesterday while driving a red error message illuminated on my dashboard indicating an oil pressure warning, it says release oil pressure. i had the oil changed and filter replaced almost 2 months ago.no problem with the car until now. what is the cause of this error?and should i be concerned since i still drive the car.should this be an immediate fix,the car still runs fine