I would assume this is a good thing as it saves you a trip to the retailer and time waiting around for it to be fixed. I suspect you also have free navigation map updates that you are able to trigger, in case you didn't know.
I can not speak for all brands but `I know Audi, Porsche, Bentley and Mercedes off free built in SIM connectivity at no charge. Some are for 3 where others, like Audi, offer 3 years. Google Maps, live traffic, streaming, Google Search etc.
It's this connectivity that allows all the downloading and the emergency help. God willing you will never need it but a nice sense of security should you do. I believe your Merc also bundles in roadside and technical support. You should have two buttons, SOS and a wrench marked one. Best pull out the manual and have a read and more importantly enjoy the benefits of this all!
