Plug and go. I didn't have to do any programming. The rear ride self levels, so no matter the load, it adjusts. If you have a trailer plugged in, it will disable the rear PDC alerts. I used a Tekonsha wireless brake controller - it's pretty slick.

https://www.etrailer.com/Brake-Contr...sha/90250.html

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Daily Drivers:
- 2008 535i, 320,000km
- 2004 X5 4.4, 01/2004 production, 420,000km
- 1997 328i, 350,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2013 Ski-Doo MXZ X 800 E-TEC, trail can
- 2007 Ski-Doo MXZ Blizzard 800 HO
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)
- 1977 Ski-Doo Olympique 340E