Remove/install drive authorization module (FBM) - AR54.21-P-1300GH

MODEL 163.136 /154 /172 #A as of 145273 163.136 /154 /172 #X as of 708319, 163.113/128/157/174/175 

Fig 1: Identifying Drive Authorization Module (FBM) Components

	Remove/install
1	Remove Extended-Activity-Module (EAM) (2)		AR54.21-P-1200GH
2	Loosen the retaining lugs (3) which hold the DAS control module (5) in the EAM	Ensure that the retaining lugs do not break off. Use radio removal tools (4)for removal.
3	Remove the DAS control module from the EAM	Before installing a new DAS control module, determine in the old DAS control module whether keys are banned and code suitably in the new DAS control module. NOTE: The chassis number must be stated when ordering a new control module.
4	Install in the reverse order
5	Move ignition key into position 1 for at least 40 seconds
6	Check whether the vehicle can be started with all keys