Hi Monster,
We have a
2002 E320 Avantgarde and we got a similar message after 2 years, which apparently is
normal. My father is best friends with one of the chief mechanics at the MB Dealership (they grew up together in Mühldorf) and apparently, this is supposed to happen according to him. I don't know if this is an excuse on their part, but our car had parts of its A/C system replaced despite there being nothing wrong with the system. I'm talking about the
Aktivkohlefilter (active coal filter

) and other non electronic materials that were simply swapped for a brand new replacement. Once the service is completed, your E-Class won't have to go in for another service unless something breaks or goes wrong.
BTW, here in Germany, we don't get "Service C" messages. Our E-Class tells us exactly what's wrong, aka the specific problem. I'd check with the Australian MB Website if they can define what Service C etc. is.
