Installation Instructions for Mercedes-Benz GLC 300

Part Numbers:

• 76628
• 84628
• CQT76628

Tools Required:

• Safety Glasses
• Ratchet
• Torque Wrench
• Sockets: 8mm, 10mm, 18mm (deep well), T40 Torx bit, 12-point socket
• Flat Head Screwdriver
• Plastic Trim Tools
• Tin Snips
• Socket Extension
• Blue Thread Locker (Optional)
• Die Grinder

Weight Capacities:

• Weight Carrying:
  • Max Gross Trailer Weight: 4,500 lbs (2,043 kg)
  • Max Tongue Weight: 675 lbs (306 kg)
• Weight Distributing:
  • Not Applicable

Installation Time:

• Difficulty: Expert

Step-by-Step Instructions:

1. Remove Taillights:

• Open the trunk and remove the access panel to the taillights.
• Use an 8mm socket to remove 3 flange nuts per side.
• For additional clearance, remove the tie-down loop on the passenger side using a T40 Torx bit.
• Disconnect the wiring and remove the taillight assembly.

2. Remove Fascia:

• Use a 10mm socket to remove 2 bolts beneath the vehicle near the wheel wells (Figures 2 and 3).
• Remove 3 plastic rivets from each wheel well using a flathead screwdriver or plastic trim tools (Figure 4).
• Remove one rivet from beneath the wheel well cover on each side.
• Use a small screwdriver to remove an additional screw located behind the wheel well covering (Figure 5).
• Carefully unclip and detach the fascia, working from the rear wheel well trim toward the taillights and then along the bottom edge of the vehicle.
• Disconnect any wiring harnesses or sensors attached to the fascia and set it aside.

3. Lower Exhaust:

• Use a 12-point 3/8" socket to unbolt the exhaust from the bumper attachment on both sides.

4. Remove Bumper:

• Use an 18mm deep well socket to remove the 4 flange nuts securing the bumper.
• Retain these nuts for hitch installation.

5. Install Hitch:

• Position the hitch over the existing studs/bolts and align it as shown in Figure 1.
• Reinstall the bumper over the hitch and secure it using the existing flange nuts.

6. Tighten Fasteners:

• Use a torque wrench to tighten all M12 CL10 fasteners to 76 lb-ft (103 N·m).

7. Adjust Heat Shield:

• Trim or push the heat shield forward to avoid interference with the hitch.

8. Trim Kick Sensor Bracket:

• Use a die grinder to remove the specified area of the sensor bracket (Figure 7).

9. Reinstall Exhaust:

• Reattach the exhaust hangers removed earlier.

10. Reinstall Fascia and Electrical:

• Place sensors back into their original positions and reconnect wiring harnesses.
• Gently reinstall the fascia, securing it with all fasteners removed earlier.

11. Reinstall Taillights:

• Reinstall the taillights and reconnect wiring.
• Replace any trim panels removed for access.

Safety Notes:

• Regularly inspect the hitch and fasteners to ensure secure attachment.
• If the hitch is removed, plug all holes in the body panels to prevent water or exhaust entry.
• Replace any damaged hitch or ball immediately.
• Always wear safety glasses and follow safety precautions when working beneath a vehicle.
• Do not cut access or attachment holes with a torch.

Specifications:

• Hitch Type: Class III
• Compliance: This product meets safety specifications as per V.E.S.C. Regulation V-5 and SAE J684.

Note: Always adhere to the lower of the vehicle manufacturer’s towing capacity or the hitch's rated capacity.

Installation Instructions for Mercedes-Benz GLC 300

Part Numbers:

• 76628
• 84628
• CQT76628

Tools Required:

• Safety Glasses
• Ratchet
• Torque Wrench
• Sockets: 8 mm, 10 mm, 18 mm (deep well), T40 Torx bit, 12-point socket
• Flat Head Screwdriver
• Plastic Trim Tools
• Tin Snips
• Socket Extension
• Blue Thread Locker (Optional)
• Die Grinder

Weight Capacities:

• Weight Carrying:
  • Max Gross Trailer Weight: 4,500 lbs (2,043 kg)
  • Max Tongue Weight: 675 lbs (306 kg)
• Weight Distributing:
  • Not Applicable

Installation Time:

• Difficulty: Expert

Step-by-Step Instructions:

1. Remove Taillights:

• Open the trunk and remove the access panel to the taillights.
• Use an 8 mm socket to remove 3 flange nuts per side.
• For additional clearance, remove the tie-down loop on the passenger side using a T40 Torx bit.
• Disconnect the wiring and remove the taillight assembly.

2. Remove Fascia:

• Use a 10 mm socket to remove 2 bolts beneath the vehicle near the wheel wells (Figures 2 and 3).
• Remove 3 plastic rivets from each wheel well using a flathead screwdriver or plastic trim tools (Figure 4).
• Remove one rivet from beneath the wheel well cover on each side.
• Use a small screwdriver to remove an additional screw located behind the wheel well covering (Figure 5).
• Carefully unclip and detach the fascia, working from the rear wheel well trim toward the taillights and then along the bottom edge of the vehicle.
• Disconnect any wiring harnesses or sensors attached to the fascia and set it aside.

3. Lower Exhaust:

• Use a 12-point 3/8" socket to unbolt the exhaust from the bumper attachment on both sides.

4. Remove Bumper:

• Use an 18 mm deep well socket to remove the 4 flange nuts securing the bumper.
• Retain these nuts for hitch installation.

5. Install Hitch:

• Position the hitch over the existing studs/bolts and align it as shown in Figure 1.
• Reinstall the bumper over the hitch and secure it using the existing flange nuts.

6. Tighten Fasteners:

• Use a torque wrench to tighten all M12 CL10 fasteners to 76 lb-ft (103 N*m).

7. Adjust Heat Shield:

• Trim or push the heat shield forward to avoid interference with the hitch.

8. Trim Kick Sensor Bracket:

• Use a die grinder to remove the specified area of the sensor bracket (Figure 7).

9. Reinstall Exhaust:

• Reattach the exhaust hangers removed earlier.

10. Reinstall Fascia and Electrical:

• Place sensors back into their original positions and reconnect wiring harnesses.
• Gently reinstall the fascia, securing it with all fasteners removed earlier.

11. Reinstall Taillights:

• Reinstall the taillights and reconnect wiring.
• Replace any trim panels removed for access.

Safety Notes:

• Regularly inspect the hitch and fasteners to ensure secure attachment.
• If the hitch is removed, plug all holes in the body panels to prevent water or exhaust entry.
• Replace any damaged hitch or ball immediately.
• Always wear safety glasses and follow safety precautions when working beneath a vehicle.
• Do not cut access or attachment holes with a torch.

Specifications:

• Hitch Type: Class III
• Compliance: This product meets safety specifications as per V.E.S.C. Regulation V-5 and SAE J684.

Note: Always adhere to the lower of the vehicle manufacturer’s towing capacity or the hitch's rated capacity.

Additional Notes:

• Attention: This is a summary of the installation procedure. For complete installation instructions, including diagrams and detailed information from the manufacturer, please download the full installation PDF.
• For detailed photo instructions, scan the QR code provided in the manual or visit the website.

Technical Support:

For technical support and assistance, our team of experts is available to help. You can reach our tech support by visiting www.trailerjacks.com or calling 877-869-6690.

Warranty Information:

This product is covered under a limited warranty. For complete warranty instructions, please download the full installation PDF.

Installation Instructions for T-One® T-Connector for Mercedes GLC300

Part Numbers:

• 118747

Tools Required:

• 10mm Socket & Ratchet or Wrench
• Drill (3/32” Drill Bit)
• Wire Crimpers
• Wire Cutters
• Phillips Head Screwdriver

Step-by-Step Instructions:

1. Prepare the Vehicle:

   • Open the rear hatch and temporarily remove the rear threshold plate.

2. Access the Taillight Wiring Harness:

   • On both the driver and passenger sides, remove the access panels.
   • Locate the taillight wiring harness with connection points matching the T-One® Connector ends. Separate the connectors carefully to avoid damaging the locking tabs. Clean all connector surfaces.

3. Connect the Passenger-Side T-Connector:

   • Route the harness with the green wire through the opening in the side panel near the threshold and up behind the taillight pocket.
   • Insert the T-One® Connector end with the green wire between the vehicle wiring connectors. Lock into place, ensuring the connectors are fully inserted and secure.

4. Connect the Driver-Side T-Connector:

   • Locate the access hole on the driver’s side between the spare tire and rear threshold.
   • Route the T-One® Connector end with the yellow wire up through the hole to the access panel.
   • Insert the T-One® Connector end with the yellow wire between the vehicle wiring connectors and lock into place.

5. Mount the Black Box Module:

   • On the passenger side, mount the T-One® Connector black box using the provided double-sided tape.
   • Secure the remaining T-One® Connector harness with the supplied cable ties to prevent damage or rattling. Avoid areas that may cut or pinch the wire.

6. Ground the White Wire:

   • Locate a suitable grounding point near the connector, such as an existing ground stud, or drill a 3/32” hole. Secure the white wire using the provided eyelet and screw.
   • Caution: Verify what is behind any surface before drilling to avoid damage or injury. Do not drill into exposed surfaces.

7. Connect the Power Wire:

   • On the passenger side, locate the black 12-gauge power wire from the T-One® Connector black box.
   • Attach the provided black 12-gauge wire and route it along the exterior frame or follow existing wiring to the engine compartment. Avoid areas that may pinch, cut, or break the wire.

   Warning: If routing through a grommet and along the exterior, avoid hot pipes, heat shields, fuel tanks, or other hazardous points.

8. Connect to the Vehicle Battery:

   • Disconnect the vehicle’s Negative (-) battery cable.
   • Remove the fuse from the yellow fuse holder.
   • Attach the ring terminal to the Positive (+) battery cable and connect the other end of the fuse holder to the black 12-gauge wire using the yellow butt connector.

   Warning: Follow all warnings and cautions related to the tow vehicle’s battery. Ensure all connections are complete for proper functionality.

9. Secure the Wiring Harness:

   • Use the provided cable ties to secure the remaining T-One® Connector harness, avoiding areas that may pinch, cut, or melt the wire.

10. Reassemble the Vehicle:

    • Reinstall the plastic trim panels, threshold, storage covers, floor covering, and any other removed items.

11. Store the 4-Flat Connector:

    • Store the 4-flat connector in the rear cargo area when not in use.

12. Test the Installation:

    • Insert the 15-amp fuse into the fuse holder.
    • Test the installation using a test light or trailer. Reset the vehicle’s electrical system by temporarily removing the key from the ignition.

Safety Notes:

• Overloading circuits can cause fires. Do not exceed stated product ratings or vehicle manufacturer specifications.
• Always wear safety glasses and follow safety precautions during installation.

Manufacturer Notes:

• Refer to the vehicle owner’s manual and the instruction sheet for additional details.
• Store these instructions for future reference.

Installation Instructions for T-One® T-Connector for Mercedes GLC300

Part Numbers:

• 118747

Tools Required:

• 10mm Socket & Ratchet or Wrench
• Drill (3/32” Drill Bit)
• Wire Crimpers
• Wire Cutters
• Phillips Head Screwdriver

Step-by-Step Instructions:

1. Prepare the Vehicle:

   • Open the rear hatch and temporarily remove the rear threshold plate.

2. Access the Taillight Wiring Harness:

   • On both the driver and passenger sides, remove the access panels.
   • Locate the taillight wiring harness with connection points matching the T-One® Connector ends. Separate the connectors carefully to avoid damaging the locking tabs. Clean all connector surfaces.

3. Connect the Passenger-Side T-Connector:

   • Route the harness with the green wire through the opening in the side panel near the threshold and up behind the taillight pocket.
   • Insert the T-One® Connector end with the green wire between the vehicle wiring connectors. Lock into place, ensuring the connectors are fully inserted and secure.

4. Connect the Driver-Side T-Connector:

   • Locate the access hole on the driver’s side between the spare tire and rear threshold.
   • Route the T-One® Connector end with the yellow wire up through the hole to the access panel.
   • Insert the T-One® Connector end with the yellow wire between the vehicle wiring connectors and lock into place.

5. Mount the Black Box Module:

   • On the passenger side, mount the T-One® Connector black box using the provided double-sided tape.
   • Secure the remaining T-One® Connector harness with the supplied cable ties to prevent damage or rattling. Avoid areas that may cut or pinch the wire.

6. Ground the White Wire:

   • Locate a suitable grounding point near the connector, such as an existing ground stud, or drill a 3/32” hole. Secure the white wire using the provided eyelet and screw.
   • Caution: Verify what is behind any surface before drilling to avoid damage or injury. Do not drill into exposed surfaces.

7. Connect the Power Wire:

   • On the passenger side, locate the black 12-gauge power wire from the T-One® Connector black box.
   • Attach the provided black 12-gauge wire and route it along the exterior frame or follow existing wiring to the engine compartment. Avoid areas that may pinch, cut, or break the wire.

   Warning: If routing through a grommet and along the exterior, avoid hot pipes, heat shields, fuel tanks, or other hazardous points.

8. Connect to the Vehicle Battery:

   • Disconnect the vehicle’s Negative (-) battery cable.
   • Remove the fuse from the yellow fuse holder.
   • Attach the ring terminal to the Positive (+) battery cable and connect the other end of the fuse holder to the black 12-gauge wire using the yellow butt connector.

   Warning: Follow all warnings and cautions related to the tow vehicle’s battery. Ensure all connections are complete for proper functionality.

9. Secure the Wiring Harness:

   • Use the provided cable ties to secure the remaining T-One® Connector harness, avoiding areas that may pinch, cut, or melt the wire.

10. Reassemble the Vehicle:

    • Reinstall the plastic trim panels, threshold, storage covers, floor covering, and any other removed items.

11. Store the 4-Flat Connector:

    • Store the 4-flat connector in the rear cargo area when not in use.

12. Test the Installation:

    • Insert the 15-amp fuse into the fuse holder.
    • Test the installation using a test light or trailer. Reset the vehicle’s electrical system by temporarily removing the key from the ignition.

Safety Notes:

• Overloading circuits can cause fires. Do not exceed stated product ratings or vehicle manufacturer specifications.
• Always wear safety glasses and follow safety precautions during installation.

Manufacturer Notes:

• For complete installation instructions, including diagrams and detailed information from the manufacturer, please download the full installation PDF.
• Refer to the vehicle owner’s manual for additional details.
• Store these instructions for future reference.

Technical Support:
For technical support and assistance, our team of experts is available to help. You can reach our tech support by visiting www.trailerjacks.com or calling 877-869-6690.

Warranty:
For complete warranty instructions, please download the full installation PDF.