No, it is not a joke, but not many people have the settings changed for the chirp. The DAS computer must be used by a tech to enable the Netherlands setting in the rear SAM. Here is a pic of the DAS screen.
My 2006 C350 was at the dealership for service, all I had to do was ask them to activate the "chirp" since they already had it in the shop. Now my car has the locking notification and they didn't charge me anything.
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