Hitch, Wiring, and Brake Controller for 2025 Sprinter 3500XD With 170" Wheelbase
Updated 09/26/2025 | Published 04/19/2025
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Question:
Hi there, I am purchasing a 2025 Sprinter 3500XD 170WB, without the factory tow and with the rear step. Can you please recommend the best hitch that can tow 7000lb and the best brake controller? I would prefer the Curt wireless one. What do I need for an install? Thank you!
asked by: Alin P
Expert Reply:
Hey Alin! For a hitch I recommend the etrailer # e82TR. Keep in mind, just like the other available hitches you can only tow 7,000 lbs while using a weight distribution hitch. To find the right WDH you need to know the tongue weight of your setup. What kind of trailer are you towing?
For wiring you will start by adding the Curt # C59236 for a 4-way and then upgrade to a 7-way using the # ETBC7L. The # ETBC7L does not include the brake output wire since you don't need it to use the Curt Echo # C51180. The Curt is a good option if you don't want to mess with other wiring.
However, I do prefer the Redarc Tow-Pro Liberty # RED52VR. The main unit installs behind the dash so only the control knob is visible. It is simple, reliable, and you don't have to worry about messing with an app. If you decide to go this route you will need the # ETBC7 for wiring since that comes with the brake output wire.
If you have any other questions feel free to reply below.
(click to enlarge)
Product Page this Question was Asked From
Curt Echo Wireless Brake Controller - 7-Way Plug-in w/ Bluetooth App - Up to 2 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Plug-In
- Smartphone App
- Under-Dash
- Up to 2 Axles
- Smartphone Display
- Multiple Trailers
- CURT
more information >
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Robin H.
9/26/2025
Hey Alin, did you find a hitch and brake controller setup that worked for your Sprinter? I’d love to hear your outcome because it could give others confidence when setting up their towing system.