61 13 ... In-Line Plugs, 20-Pin, System D2.5

Pull locking slide (1) out of connector (2).

Fig 1: Identifying Locking Slide And Connector

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With special tool 61 1 132 (ejector), press back arrester hook (3) of appropriate contact and pull out cable.

Fig 2: Identifying Arrester Hook And Special Tool 61 1 132

Courtesy of BMW OF NORTH AMERICA, INC.