Thanks so much for your response - that was very enlightening to a new Merc owner like myself...I must ask, is it a must to use Synthetic oil? I called the dealer to schedule an appointment just now...he said I needed service B since I'm touching 24000 miles, and it would be $285, and $100 more if I chose Synthetic oil (arriving at $420 with taxes and such).
Is it a problem if I went with "normal" oil and not Synthetic? What, in your opinion, are the advantages of using Synthetic oil?
I appreciate your time and patience very much!