Version with center armrest storage tray (2) only:

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Attach special tools 00 9 341 as illustrated. See Figure.

Unclip oddments tray in center armrest (2) in direction of arrow and remove.

Disconnect plug connection (1).

Fig 1: Removing Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (2).

Pull back control unit in center armrest at rear (3), lift at front and feed out towards top.

Unlock covers (1) and fold up.

Fig 2: Removing Control Unit In Center Armrest At Rear

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect all ribbon cables (2).

Remove control unit in center armrest at rear (3).

Replacement:

Carry out coding/programming.

Observe following IDC specifications:

Programming
Coding
Car & Key Memory
CD "CIP"

Fig 3: View Of Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.