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84 10... Replacing emergency battery for Telematic Communication Box (TCB)

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTRICAL DAMAGE (ESD PROTECTION) .

Necessary preliminary tasks: 

Open lid (1). on TCB (2) in direction of arrow.

Fig 1: Opening TCB Lid
G09929998Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Remove emergency battery (2) from TCB (3).

Fig 2: Removing Emergency Battery From TCB
G09929999Courtesy of BMW OF NORTH AMERICA, INC.