That procedure is explained in the owner's manual. The big white book. We
have the same car and I just did the oil change too.
If you don't have the owner's manual, I'd suggest you buy one from MB.
You know... the $400 may seems like alot of money for oil change and some
fluids... but it is actuall alot more than that. Like Service B, also
includes changing air filter, cabin filters, check alot of components like a
There are alot of things to check and change so sometime it is more
convenient to let them do it once in a while... while you can take care of
the more common Service A.
There is also brake fluid flush... coolant system flush at 30,000
miles...umm... charcoal cabin filter at 45,000 miles...and so on.