Originally Posted by Rockster
This. I have no doubt other oils can be used, but why rationalize something else? There is nothing urgent about the oil change you are describing and I wouldn't do it unless you are putting something into the car that is supposed to be there.
Look at the sticker. Look in the manual. Easy decision :-)
If I recall the sticker says 'Recommended'. Obvious B2B tie in. Any oil that adheres to the MB spec will keep it in warranty. Why change to something else? Cost and/or availability. Simple.