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Home >> Mercedes Benz >> 2002 >> C240 Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Wiring Harness, Jacking/Hoisting -- Testing & Repair -- 203 Chassis >> Testing & Repair >> Remove contacts from micro quadlock system coupling - AR00.19-P-0120-04A

Remove contacts from micro quadlock system coupling - AR00.19-P-0120-04A

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 Wiring Harness Repair Kit (220 589 02 99 00)
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Fig 4: Identifying Blade Holder With Clamping Pliers (220 589 01 99 50)
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Fig 5: Identifying MQS Blade (220 589 01 99 60)
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Secondary unlocking for version with retaining cap (MQS) 

  1. Guide suitable tool (1) all the way into groove (4) from the side.
  2. Remove retaining cap (2) from coupling housing (3) in direction of arrow.

Shown on 3/3-pin MQS coupling 

Fig 6: Secondary Unlocking For Version With Retaining Cap (MQS) - Shown On 3/3-Pin MQS Coupling
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Secondary unlocking for version with retaining housing (MQS) 

  1. Lift locking catch (2) of retaining cap (4) using a suitable tool (1).
  2. Pull coupling housing (3) from retaining cap (4) in direction shown by arrow.

Shown on a 3/3-pin MQS/MCP coupling 

Fig 7: Secondary Unlocking For Version With Retaining Housing (MQS) - Shown On A 3/3-Pin MQS/MCP Coupling
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Secondary unlocking for version with cap (MQS) 

  1. Detach cover (1) from cap (2) in direction of arrow over the catch mechanism.
  2. Remove connector housing (3) from cap (2) in direction of arrow.

Shown on 14-pin MQS coupling with a connector housing 

Fig 8: Secondary Unlocking For Version With Cap (MQS) - Shown On 14-Pin MQS Coupling With A Connector Housing
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Secondary unlocking for version with 2nd contact retainer (MQS) 

  1. Using a suitable tool, open the contact retainer (1).
  2. Pry up the contact retainer (1) in direction shown by arrow.

Shown on 6-pin MQS coupling 

Fig 9: Secondary Unlocking For Version With 2Nd Contact Retainer (MQS) - Shown On 6-Pin MQS Coupling
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Secondary unlocking for version with lock tab (MQS) 

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

Shown on 8-pin MQS coupling 

Fig 10: Secondary Unlocking For Version With Lock Tab (MQS) - Shown On 8-Pin MQS Coupling
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Secondary unlocking for version with retaining housing (MQS) 

  1. Using a suitable tool, pry up the lock tab on the retaining cap (5).
  2. Pull coupling housing (6) from retaining cap (5) in direction shown by arrow.

Shown on 12-pin MQS coupling 

Fig 11: Secondary Unlocking For Version With Retaining Housing (MQS) - Shown On 12-Pin MQS Coupling
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Unpin female contacts from coupling (MQS) 

  1. Mount blade holder with clamping pliers SPECIAL TOOL and MQS blade SPECIAL TOOL from above through the opening in the exposed connector housing (1) at the spring of the female contact (2).
  2. Press the spring shackle of the female contact (2) downward and push the female contact (2) out of the contact cavity of the connector housing (1). Tug the corresponding cable at the same time to assist the unpinning procedure.

Illustrated on an 18-pin MQS coupling with a connector housing (circular conductor) 

Fig 12: Unpinning Female Contacts From Coupling (MQS) - Illustrated On An 18-Pin MQS Coupling With A Connector Housing (Circular Conductor)
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Illustrated on a 2-pin MQS coupling (circular conductor) 

Fig 13: Unpinning Female Contacts From Coupling With 2Nd Contact Retainer (MQS) - Illustrated On A 2-Pin MQS Coupling (Circular Conductor)
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Unpin female contacts from coupling with 2nd contact retainer (MQS) 

  1. Mount blade holder with clamping pliers SPECIAL TOOL and MQS blade SPECIAL TOOL from above through the opening (3) of the connector housing (1), press down spring shackle of female contact (2), and pull female contact (2) out of contact cavity of connector housing (1) up to the stop.
  2. Mount blade holder with clamping pliers SPECIAL TOOL and MQS blade SPECIAL TOOL from above through the opening (4), press down spring shackle of female contact (2), and pull female contact (2) out of contact cavity of connector housing (1).

    IMPORTANT Tug the corresponding cable at the same time to help unpinning procedure.

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