I recently purchased a 2025 GLE450 and have been reviewing the forums for brake controller suggestions. Lots of great info and have found factory under dash wiring to hook up a controller. I see lots of wired posts on the Prodigy P2 or P3 and a few using the Curt echo wireless controller. I would prefer not to drill into the dash to mount a P2/P3 controller and don’t like the Curt Echo Wireless design of hanging off the 7 pin plug. I see that Curt has an Echo underdash Bluetooth controller. I assume it works much the same as the 7 ping plug based Echo and looks like it uses the same app. Anyone have any experience with the Curt Echo Underdash controller?

Thanks