Hi I bought a second hand 2007 c200 Kompressor Supercharge w204 model recently, a note "Check Eng. oil level when next refuelling" comes out, and I understand that engine oil level is low which I checked. I am thinking to buy the engine oil and refill it myself, is that okay? will the dashboard indicator disappear after I refilled? Or do I have to bring it back to Mercedes service centre to do it for me? Please advise. Thanks for your time.