pa28pilot

We're about to put my wife's '99 ML430 to real use towing a small horse trailer. All of the trailers we're considering have electric brakes, so I think we'll need to install a brake controller.

I have read the MB service bulletin on Wolfgang's 4X4 site about how to install one, but I'm wondering if the folks here have any preference between the different types (inertial/proportional/timer), or brands?

I'm thinking we'll probably have around 4500-5000 lbs (not including pax/cabin payload in the ML) under tow.

I realize that some variants require the operator to learn a somewhat new style of braking (other than basic trailer driving principles), and I'm interested in hearing any comments about that. My wife's a fast learner, but I wouldn't want to increase her workload unnecessarily.

Thanks!