Brake Controller Recommendation for 2025 Sprinter 4500 Mercedes

Updated 06/10/2026 | Published 07/03/2025

Question:

2025 Sprinter rv 4500 Need brake controller and harness, has 7 pin at back of unit

asked by: Dave B

Expert Reply:

Hey Dave, the install harness part # 3063-P does fit to the green connector that is under your seat in your 2025 Mercedes Benz Sprinter 4500 and would work great with the P3 part # 90195 which is widely considered to be the best controller around.

I attached a link on this page that will help you find the connector as well.

expert reply by: Jameson C

Jameson C.

8/7/2025

Hey Dave, did the Tekonsha harness and P3 brake controller work out for your Sprinter? I'm curious to know if everything fit well and if you're satisfied with the setup.

Trevor S.

6/10/2026

@JamesonC I have the same van and same question. I do not see 3063-P as a valid part on the website. Is there an updated part? I have another wiring harness and the lights work but my Tekonsha P3 doesn't detect the brakes and gives me a no trailer error.

Jameson C.

6/10/2026

@TrevorS The manufacturer who made the 3063-P is no longer around so we can't get it anymore. I wish we had a similar harness from a different manufacturer but at this time we do not.