Hitch, Wiring, and Brake Controller for 2025 Sprinter 3500XD With 170" Wheelbase

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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

0

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.

expert reply by: Robin H

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etrailer Hitch on Sprinter
(click to enlarge)

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.

Marshall

3/13/2026

@RobinH did he ever give you an answer on this? I have a 2025 Forest River Sunseeker on a 2023 Mercedes 3500XD chassis. I'm looking to haul an Aluma car hauler with a subaru Outback combined weight of 5500 lbs. Looking to upgrade to a class III hitch ad my class II is rated at 5000 lbs. I plan to order the Redarc 5200VR and the ETBC7 harness. Is there anything else I will need? Plan on coordinating with a certified installer to make sure I get this right.

Robin H.

3/14/2026

@Marshall no but I can tell you it that is poorly worded and this will work for you. The # C59236 and # ETBC7 are universal parts. The # RED52VR comes with a universal hiring harness as well so that will work with any vehicle really. The only thing I'm not sure on is the hitch, since that depends on your wheelbase and bumper. The hitch above works for a 170" wheelbase with a step bumper and doesn't reach that 5,500 lb capacity you need. If you have a 144" or 170" with a standard bumper the # e76AR has a high enough capacity.

Answer 1

Hey Michael, I can not see in your cart but I can see some of the parts you were looking at. I checked with Tekonsha and a few other brake controller manufacturers and there are no plug and play adapters, like item #3063-P, that fit the 2024 Mercedes…

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Answer 2

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 3

Hey Brandon, I would strongly recommend sticking with the Tekonsha RF brake controller part #TK94FR. We know this works really well and it sounds like it worked well for you too. The Curt Echo is not reliable enough for me to really ever recommend it…

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Answer 4

Hey Ron, congratulations on the new trailer! I have a Jay Feather myself and love it. You're definitely off to a great start with a weight distribution hitch, it will make a world of difference towing that trailer with your F-150. The Weigh Safe…

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Answer 5

Hello Jack, Yes, you can absolutely lock it to the pedestal. If you are going with the Watchdog Power Center Surge Protector and Voltage Booster - Bluetooth and WiFi - 30 Amp #HU84ZR, I would use our etrailer Cable Lock - 10' Long - 5/16"…

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Answer 6

Hey Matthew. No one makes a custom fit gooseneck hitch for a Silverado 5500 but we do have a couple of options depending on how your truck is setup. If you have a flatbed truck or one with a regular bed, you can use the B&W Turnoverball Underbed…

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Answer 7

Hey Dennis. For your 2023 Toyota Tundra, you'll need the Redarc Tow-Pro Liberty Brake Controller w/ Custom Harness item #RED98CR. This is the correct kit that comes with the custom fit wiring harness that will make installation super easy. The…

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Answer 8

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 9

Yes, the Curt Trailer Hitch Receiver item #13358 does fit the 2022 Mercedes-Benz Sprinter 2500 with the factory step bumper. This hitch is custom fit and bolts to your Mercedes with included hardware. We have not heard of any issues with the rear…

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Answer 10

Hey Pablo, If your 2020 Mercedes-Benz Sprinter 2500 has a 144" or 170" wheelbase with a standard bumper you'll need the Draw-Tite Max-Frame Trailer Hitch Receiver #75549. If you have a 144" or 170" wheelbase with a factory…

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Answer 11

Just a single difference exists between the Curt and etrailer trailer hitches for your 2024 Mercedes Sprinter 2500 with a factory step bumper, which is the finish. The etrailer hitch has a matte black finish, while the Curt hitch has a glossy black…

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Hitch, Wiring, and Brake Controller for 2025 Sprinter 3500XD With 170" Wheelbase

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