PUZZ1

I have an 04 E500 that I took deliver of in June of 04 with a build date of May 04. I have approx. 12,000 miles on the car and the indicator is telling me that Service B is due in approx 1,200 miles.

Was my car programmed with the 2005 service indicator eventhough I have an 04 model. I was under the impression that the A-H ratings were a part of the new plan. I know they were changing over right around the time I picked up my car but figured I was grandfathered. Did I get f'd with the 05 plan??