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2017 - 2023 Mercedes-Benz GLS450
Confirmed to Fit
Always the correct part
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Always the correct part
We know our products
Quality Products
Free Shipping!
Includes mounting hardware & plug & play harness
Knob outside diameter is 1.9"
Patent #10,960,860
Includes mounting hardware & plug & play harness
Warranty: Limited Lifetime
Installation Time Exact (Minutes): 0
The CURT Spectrum trailer brake controller provides powerful brake operation while maintaining a clean, consistent OE look and feel on the dash of your vehicle. It is comprised of a main module and a separate user interface. This interface is a simple rotary knob with a push-button and ten tri-color LEDs to control and monitor all trailer brake activity. It also features a triple-axis accelerometer for highly responsive, smooth stops on any grade. The separated module and interface of the Spectrum brake controller allow it to integrate with the vehicle unlike any other. The main module can be mounted behind the dash and completely out of sight. The separate rotary knob provides a sleek, subtle interface that mounts on the dash of the vehicle wherever desired. It features ten LEDs with three colors each (red, green and blue) to indicate trailer brake activity and power adjustment. The rotary knob and integrated push-button allow for simple and effective operation of the control settings and manual adjustment. The Spectrum trailer brake controller offers superior safety and helps protect the life of your vehicle and trailer with its advanced triple-axis accelerometer. This integrated circuit detects the motion of the vehicle and trailer when making stops and applies the precise amount of brake power for maximum efficiency and effectiveness. The three axes of the circuit also enable the brake control to compensate when going up or down a hill. Like most CURT brake controllers, the Spectrum installs using one of our vehicle-specific quick plug harnesses. It also has automated leveling and calibration capabilities to simplify and speed up the installation process. The Spectrum trailer brake controller comes with mounting hardware for a complete installation.
CURT offers a variety of high-quality trailer hitches and accessories for select vehicle models. Find the perfect fit for your towing needs at TowUniverse.
CURT, a Lippert brand, offers a complete line of towing products and is the leading manufacturer of custom-fit trailer hitches. We offer the broadest selection of custom-fit hitches, and each one is designed, welded, and coated in Wisconsin.
CURT is also a leader in flat towing products, as well as 5th wheel, gooseneck, and weight distribution hitches, ball mounts, electrical components, cargo solutions, and other towing accessories.
For everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®.'
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Call 888-634-94941 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2017 - 2023 | Mercedes-Benz GLS450 | — |
Yes, the 2017-2023 Mercedes-Benz GLS450 with Factory Tow Package CURT Venturer NEXT Time-Delay Trailer Brake Controller for 1-3 Axles #51116 (Part #CURTBC1967) is designed to fit the 2017-2023 Mercedes-Benz GLS450.
The 2017-2023 Mercedes-Benz GLS450 with Factory Tow Package CURT Venturer NEXT Time-Delay Trailer Brake Controller for 1-3 Axles #51116 (Part #CURTBC1967) fits 2017-2023 Mercedes-Benz GLS450 models. The 2023 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2017-2023 Mercedes-Benz GLS450 with Factory Tow Package CURT Venturer NEXT Time-Delay Trailer Brake Controller for 1-3 Axles #51116 (Part #CURTBC1967) fits the following vehicles: 2017-2023 Mercedes-Benz GLS450. Always verify your specific year, make, and model before ordering.
The 2017-2023 Mercedes-Benz GLS450 with Factory Tow Package CURT Venturer NEXT Time-Delay Trailer Brake Controller for 1-3 Axles #51116 (Part #CURTBC1967) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
CURT 51534 is a brake control harness designed to connect a brake controller to a vehicle's factory brake control connector. It includes a custom harness with a green 4-pin connector that interfaces with the factory harness under the driver-side dash.
The manual does not specify which vehicle makes, models or years are compatible with part 51534. Contact CURT product support at 877-287-8634 or visit curtmfg.com to confirm fitment for your specific vehicle.
You will need a ratchet, a panel trim removal tool, and a T15 Torx bit. The manual notes that proper tools will improve installation quality and reduce installation time. For a full tools reference guide, visit curtmfg.com/trailer-hitch-installation.
The manual requires that the vehicle ignition be off and not in the 'ON' or 'ACCESSORY' positions prior to installation, but does not explicitly state whether the battery must be disconnected. For safety, contact CURT product support at 877-287-8634 before proceeding.
Ensure the vehicle ignition is off and not in the 'ON' or 'ACCESSORY' positions before beginning installation.
The green 4-pin brake control harness connector is located under the driver-side dash, near the kick panel. To access it: (1) carefully pull down the cover underneath the dash using a panel trim removal tool, (2) use a T15 Torx bit to remove the screws retaining the panel, and (3) use the panel trim removal tool to carefully pull back the driver-side sill plate and kick panel to expose the connector.
Install the custom brake control harness to the factory harness by inserting the connectors all the way with the locking tabs in place. Before attaching to the vehicle connectors, plug the brake control adapter into the mating connector on the brake controller first. Ensure all locking tabs are fully seated.
After testing the harness and controller, replace all parts removed in reverse order of steps 1–3. Follow the brake controller manual for installation and setup instructions.
Do not lay tools across the positive terminal (typically noted with red covers or a red '+' symbol), as this can cause a ground short leading to sparks and/or electrical shocks. Additionally, do not exceed the product rating or tow vehicle lamp load rating, whichever is lower.
Test for proper function by using a test light or connecting a properly wired trailer. The manual requires that all steps be followed to ensure the product will function properly. For detailed testing procedures, refer to the brake controller manual.
The manual does not specify compatible vehicles. Contact CURT at 877-287-8634 or visit curtmfg.com to confirm fitment.
You need a ratchet, panel trim removal tool, and T15 Torx bit. See curtmfg.com/trailer-hitch-installation for a full tools reference guide.
Yes. Ensure the vehicle ignition is off and not in the 'ON' or 'ACCESSORY' positions before beginning installation.
Yes. Plug the brake control adapter into the mating connector on the brake controller prior to attaching to the vehicle connectors, and ensure all locking tabs are in place.
Do not lay tools across the positive terminal (red covers or '+' symbol) as this can cause a short circuit, sparks and electrical shock.
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