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The ML W163 and W164 have an Audio 20 or Audio 30 radio with BE serial number.
Remove the radio for the BE serial number. Enter code and confirm with buttons 1+3.
Remove the radio
Read the BE serial number
Enter the serial number when placing your order
Enter the code and confirm with buttons 1+3
ML W166 (2011+) has NTG4+ — no separate radio code
ML W163 (1997-2005), W164 (2005-2011)
£9.99