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To my knowledge, the w222 doesn't use a physical SIM card, in the Hermes module, so this must be something different.
I have a SIM card tray module inside the glove box compartment. However, I was not able to identify what it is, or what it is used for. I should also mention that there is 4G internet connection in the car, and Mercedes ME functions correctly, without any SIM cards inserted.
A google search showed no results. In EPC I could not find a part that would match.
It does seem OEM looking, but just weird that I don't find anything about it.
When sitting in the back, and trying to make a phone call, using the remote and the Comand screen, I get a message saying that "business telephony is not activated".
The car in question is a w222 Facelift, with the Executive package (2 back-seats, no foldable tables).
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
