
Re: 2021 E450 BCM will not configure as built
With a fresh BCM, you will need to program two keys minimum, perform a parameter reset, possibly a CEI lock configuration, TPMS (if equipped) programming and possibly a PAM (Parking aid module, if equipped) PMI. You will always have configuration codes until every little thing is done, including TPMS. You may also need to perform the As-built by entering the VIN into PTS and manually entering the memory blocks as directed by IDS.
Andrew Alves ![]()
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