My 2004 W211 E270 Mercedes has around 350 miles before it is due a service and it will probably go over by about 500 miles before I am able to get it serviced. I intend on getting it serviced by an independent but I have been told that if I go over the service interval then I can only get the service reminder reset at a main dealer? Does anyone know if there is any truth to this? Thanks in advance.