Mercedes-Benz Automobile Service Manual page 7

There are two groups, a ("minor" =) A-service, and a
("major" =) B-service. Under normal circumstances the
driven distance between services is an average of approxi-
mately 12 000 miles, and the A and B-services alternate.
Exception: A B-service is followed by another B-service, if
the FSS calculates an oil change interval of 14 000 miles or
more.
Service work not mileage dependent is listed in section
"Additional Work to be Performed."
A detail listing of service jobs is contained in this booklet
following the service records.
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