Trailer Hitch Wiring Harness Kit For 16‑22 Mercedes‑Benz GLC Except PO3 Premium Package Plug & Play
Model: 118747Wiring Harness (Plug & Play)
Installation Instructions
Fits The Following Vehicles:
Wiring Kit Specs:
| Part Number | 118747 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions |  |
Thank you for choosing Draw Tite the most powerful name in towing industry bar none. Manufactured by the same people that brought you Reese and Hidden Hitch all of our products come with standard lifetime warranty and support. Our custom hitches mount easily on your Car Truck Van SUV and RV. Most applications simply bolt on without any need for drilling or modifying your bumper. Please review installation instructions manual pdf file above for exact step by step instructions. Chose Class 1 or 2 for light duty towing, chose Class 3 4 and 5 for heavy duty towing. Pair your hitch with accessories like a ball mount that is available in several drop and rise configurations. Choose a 2 inch ball to haul most standard trailers. Choose a 1-7/8" ball to tow small and u tility trailers. Our hitches come with generous tongue weight ratings for use with cargo racks and other accessories. All parts in our store are sold at a discount. If you have any questions please do not hesitate to give us a call at 702-374-8999
Partial list of fitment years: 16 17 18 19 20 21 22 2016 2017 2018 2019 2020 2021 2022
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Product Details
- Brand: Draw-Tite
- Model: 118747
- UPC: 016118148572
- Includes: T-One T-Connector Custom Harness
Compatibility Chart
Description
Wiring Harness (Plug & Play)
Installation Instructions
Fits The Following Vehicles:
Wiring Kit Specs:
| Part Number | 118747 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions | |
Thank you for choosing Draw Tite the most powerful name in towing industry bar none. Manufactured by the same people that brought you Reese and Hidden Hitch all of our products come with standard lifetime warranty and support. Our custom hitches mount easily on your Car Truck Van SUV and RV. Most applications simply bolt on without any need for drilling or modifying your bumper. Please review installation instructions manual pdf file above for exact step by step instructions. Chose Class 1 or 2 for light duty towing, chose Class 3 4 and 5 for heavy duty towing. Pair your hitch with accessories like a ball mount that is available in several drop and rise configurations. Choose a 2 inch ball to haul most standard trailers. Choose a 1-7/8" ball to tow small and u tility trailers. Our hitches come with generous tongue weight ratings for use with cargo racks and other accessories. All parts in our store are sold at a discount. If you have any questions please do not hesitate to give us a call at 702-374-8999
Partial list of fitment years: 16 17 18 19 20 21 22 2016 2017 2018 2019 2020 2021 2022
Get Expert Help
Trailer Hitch Wiring Harness Kit For 16-22 Mercedes-Benz GLC Except PO3 Premium Package Plug & Play Install Notes
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:
-
Prepare the Vehicle:
- Open the rear hatch and temporarily remove the rear threshold plate.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
Reassemble the Vehicle:
- Reinstall the plastic trim panels, threshold, storage covers, floor covering, and any other removed items.
-
Store the 4-Flat Connector:
- Store the 4-flat connector in the rear cargo area when not in use.
-
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:
-
Prepare the Vehicle:
- Open the rear hatch and temporarily remove the rear threshold plate.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
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.
-
Reassemble the Vehicle:
- Reinstall the plastic trim panels, threshold, storage covers, floor covering, and any other removed items.
-
Store the 4-Flat Connector:
- Store the 4-flat connector in the rear cargo area when not in use.
-
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.
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