The key has two completely different security functions. The first is the remote that opens the door and turns off the alarm. The second is the drive authorization system that allows the key to start the car.

Only the first portion needs initialization. The drive authorization is already done when you get the key from MB and can not be changed. The initialization procedure is described in your owners manual and is fairly simple.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician