Servicing Regular upkeep on 2006 Mercedes-Benz S430

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I was charged 636.00 for an A service. I was not over on the mileage. My car had another 400 miles before service was needed. I'm afraid to go back for the B service. How much should I be paying for the B service regular ? I have not reached 50,000 miles yet.
(1) Answer
If you go to the Dealer, then be prepared to pay BIG $$ every time for this car. Or, you can find an excellent German shop that works on Mercedes and get much, much more for less money. There are excellent techs at independent Mercedes shops and it still fulfills the warranty.