Location of Brake Controller Port on 2026 Leisure Travel Unity U24MBL on Sprinter Chassis
Updated 01/19/2026 | Published 12/22/2025
Question:
Where is the wire to hook up a trailer electric brake controller on a 2026 Mercedes Sprinter Leisure Unity MBL?
asked by: Timothy S
Expert Reply:
Hey Timothy! The brake controller port on the Sprinter is located under the driver seat. The connector picture below will fit into the port and allow you to install a brake controller like the Redarc Tow-Pro Elite # RED52CR. I also linked an installation video on a 2021 further down on this page which shows exactly where you can find the connector.
Are you wanting to tow a trailer or is this part of your flat tow setup? Flat tow brake systems do not require a brake controller in the motorhome.
(click to enlarge)
Product Page this Question was Asked From
Redarc Tow-Pro Elite Brake Controller w/ Custom Harness - Dash Knob - Off-Road Mode - Up to 3 Axles
- 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
more information >
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Robin H.
1/19/2026
Hey Timothy, how did things go finding the brake controller port under the driver seat on your Sprinter? Did the Redarc Tow-Pro Elite connect smoothly once you located it? Your update could make it easier for others wiring a similar setup.