Remove Contacts From Micro Quadlock System Connector - AR00.19-P-0120-03B

WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.

MODEL all Micro-Quadlock-System-Connector Type 2

Fig 1: Identifying New Passenger Vehicle Wiring Harness Repair Kit (220 589 04 99 00)

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Fig 2: Identifying Wiring Harness Repair Kit, Basic (000 589 13 99 00)

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Fig 3: Identifying Blade Holder With Clamping Pliers (220 589 01 99 50)

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Fig 4: Identifying MQS Blade (220 589 01 99 60)

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Unfasten secondary release on version with lock tab

Push suitable tool underneath locking shackles (1).
Pry up the lock tabs (1) in direction shown by arrow.

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Unpin contact pins from the connector
Insert blade holder with clamping pliers and MQS blade from front side though opening above contact cavity of connector housing (3).
This presses down the spring shackle at the contact pin (2).
A slight tug on the corresponding cable will pull the contact pin (2) out of the cavity of the plug.
Foil contacts must be unpinned at the same time Tug on the foil while pressing down the spring to remove the foil.

Courtesy of MERCEDES-BENZ USA