Brake Controller Wiring Harness for 2020 Mercedes Sprinter 3500
Updated 05/08/2026 | Published 05/05/2026
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Question:
Trying to install a brake curt brake controller on to my 2020 mercedes sprinter. 3590xd I got the harness curt part 51535 but the connector is different than the car harness. Do you have the right part for this car? Or perhaps using other brand of brake controller which has the correct harness?
asked by: Patrick C
Expert Reply:
Hey Patrick! Where is that connector located? It looks like the factory connector on your Sprinter is under the driver seat. Are you sure it is the right connector? Tekonsha has a wiring harness as well, it uses the exact came connector.
Redarc brake controllers like the # RED44FR you looked at are really reliable, and what I recommend the most, but the only option would be to splice in or find the right connector in the vehicle. If you find the one that matches the Curt # C34GJ you have now, you can use the adapter # 331-TPH-019 to make it plug and play. If you decide to get a Redarc, the Liberty # RED24FR is the better choice and will save you some money.
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Product Page this Question was Asked From
Redarc Tow-Pro Liberty Brake Controller - Dash Knob - Up to 2 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Plug-In
- Dash-Mounted Knob
- Behind-Dash
- Up to 2 Axles
- Indicator Lights
- Single Trailer Only
- Redarc
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