Couple of the Volvos and Mercedes had the same system in the E55's and the CLS 63 I used to keep a pay as you go sim in them and set my phone on divert to that number if not answered, when I got in the car I turned off my phone worked really well
I guess the next question is can you still get a Sim that will fit ??🤣
For the X5 so far I have a full set of PDC sensors , a coule of Ride Height sensors, a Final Stage Resistor and a couple of ULF (Bluetooth units) 17" spare wheel etc still got a load of stuff to sort through though
Dave