Thanks for your detailed response. The car only had a manual, no service booklet. That's the reason I am not sure what was done and when it was done.
How often is an A service done, and how often is a B service done? Does one of them have to be done every time the FSS touches 4000?
I'm guessing service A every 3000 miles, service B every 7500. Is that accurate enough (with them alternating, of course)?
I am not too familiar with Benz, so I'd appreciate any feedback!
I plan on getting the dealer to give me a service booklet to make things clearer to my muddled head...so I'd appreciate your help in the meantime.
Thanks for your reply in advance!