Originally Posted by nomad
You have to put your SIM card in the slot provided do you not

Yes it's all very 1990's tech.
Mercedes/Nokia use SAP (SIM Access Protocol) over
bluetooth which means it grabs all the SIM info
from your mobile but actually uses the
car's phone to make/rec calls.
Works well and gives you an 8 watt phone
with an external antenna instead of a
2 watt phone in a metal box.