Parts Needed to Add 7 Way Trailer Connector on 2019 Mercedes GLS450
Question:
I need the trailer hitch wiring ending in a 7 blade connector for this vehicle. Mercedes typical response is a wire loom p/n 1665401403 and a 7 pin to 7 pin connector p/n 0008211856 that does not interface to the wire loom. Any help is seriously appreciated. Thanks.
asked by: Jeff
Expert Reply:
It sounds like you're trying to add a 7 way connector to your 2019 Mercedes GLS450. I have a solution for you but there are no "plug and play" style connectors available for these vehicles so we'll need to cobble together some pieces to make this work- you'll need to first install a 4 way flat connector and then add in the 7 way.
To start, I recommend using the Tekonsha ZCI # 119250KIT which allows you to clamp onto the wiring on your GLS450 to receive the signals you need to install and operate a 4 way trailer connector. I highly recommend this kit for high end luxury vehicles because of the non-invasive and easy installation. If you're willing to do some hard wiring on the vehicle you can use the Curt # C59236 to install your 4 way connector.
Once you've installed your 4 way, I recommend using the # ETBC7L which will allow you to use a wireless brake controller like the Curt Echo Mobile # C51180 or no brake controller at all if you're just looking to provide lights to your trailer. Using this 7 way connector is not an option if you have a wired brake controller for your vehicle like the Tekonsha Prodigy P3 # 90195; if you're using a wired brake controller you'll instead need to use the # ETBC7 kit for wired brake controllers. Both of these kits will provide you with a 7 way "blade" style connector for your vehicle.
Using the provided 4 way and 7 way options will allow you to install a working 7 way blade style connector on your 2019 Mercedes Benz GLS 450. I've linked some helpful installation and review videos on these items that you might find helpful during the installation process that you might want to have a look at, as well.
Products Referenced in This Question
ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Converter
- Universal Fit
- 4 Flat
- Tekonsha
more information >
Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 4 Axles
- LCD Display
- Up to 360 Degrees
- Tekonsha
more information >
Curt Echo Wireless Brake Controller - 7-Way Plug Mount w/ Bluetooth App - 1 to 2 Axle - Proportional
- Trailer Brake Controller
- Proportional Controller
- Hidden
- Up to 2 Axles
- Smartphone Display
- CURT
more information >
Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Converter
- Universal Fit
- 4 Flat
- CURT
more information >
Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Accessories and Parts
- Trailer Brake Controller
- Installation Kits
- etrailer
more information >
7-Way RV Upgrade Kit for Trailer Brake Controller Installation - 12 Gauge Wires
- Accessories and Parts
- Trailer Brake Controller
- Installation Kits
- etrailer
more information >
Product Page this Question was Asked From
Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End
- Trailer Wiring
- Wiring Adapters
- Single-Function Adapter
- 7 Round - Blade
- Plug Only
- 7 Round - Blade
- Tow Ready
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Hitch
- Shop: Trailer Wiring
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Video: Curt Trailer Hitch Receiver Installation - 2018 Mercedes-Benz GLS-Class
- Video: Curt Powered Tail Light Converter Installation - 2016 Mercedes-Benz GLE
- Search Results: 59236
- Shop: Brake Controller
- Shop: etrailer Tongue Weight Scale for Campers and Utility Trailers - 2,000-lb Capacity
- Shop: Roof Rack
- Video: Choosing the Right Trailer Wiring
- Shop: Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Shop: Curt Echo Wireless Brake Controller - 7-Way Plug Mount w/ Bluetooth App - 1 to 2 Axle - Proportional
- Shop: Stealth Hitches Hidden Trailer Hitch Receiver w/ Towing Kit - Custom Fit - 2"
- Video: Hopkins 7- and 4-Pole Trailer Connector Socket Review
- Video: Choosing the Right Brake Controller
- Video: Hopkins 7-Way Trailer Connector Installation
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Search Results: tekonsha 3036 p
- Search Results: tekonsha zci
- Search Results: tekonsha 3063~p
- Search Results: 7 pin to 4 pin
- Search Results: obdii connector
- Q&A: Parts Needed to Install Brake Controller in 2020 Mercedes Benz GLS
- Q&A: Curt Echo Best Wireless Brake Controller for Mercedes-Benz GLE
- Q&A: Furrion RV Back Up Camera Connection Troubleshooting
- Q&A: Can Sway Control be Used on a Trailer without Using Weight Distribution
- Q&A: How Can I add Sway Control to my 2019 VW Atlas Without Weight Distribution
- Search Results: trailer wire extension