A brake controller makes a trailer stop more like a car. There are hundreds, maybe thousands of accessories for trailering, but nothing makes a bigger difference than the best trailer brake ...

For those unfamiliar, a trailer brake controller ... I bought a wiring harness for a 2015–2019 Sprinter, which uses the same plug, then dug up a Mercedes wiring diagram showing the pinouts ...

Trailer towing used to be simple and straightforward. You’d get a hitch and a simple four-pin trailer wiring kit installed, hook things up, and head out to the ...