The point to my story was that mistakes get made. Some are important, others less so.

As a professional Mercedes technician with 30 years experience, I personally know that your car could care less what marketing and cultural info has done to your oil prejudice.

Your problem is social not technical. You could have received a technically superior product while asking for an inferior product. The only possible consequence is you paid too much. So get them to refund the difference and go on with your life.

From my experience in business and large scale auto repair, I would guess that what was forgotten was to tell the accounting folk of the change of normal proceedure. The technician doesn't write on the ticket what he used and it is pumped from an entirely different area than the accounting is done. Two things must take place with your special handling. One the tech must be informed and two accounting must be informed. The service writer might have forgotten both, flog him. But most likely is that he told the tech and forgot to tell accounting.

You will have to excuse me if I don't see this as much worse than getting my cheeseburger with mustard on it, I hate mustard on cheeseburgers!

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician