service a on startup

a friend of mine has an s550 4matic and every time he starts up the car it says service a exceeded by 200 miles. he already had service a, and we cant figure out how to reset it. any help is appreciated.

No way of doing the reset yourself. They forgot to do mine too. Makes you wonder what else they forget when they charge you $400 for an oil change and supposedly checking other things too.


