For the record, adding factory OE wiring kit to my 2004 4.4 required no programming. Plugged in a trailer with standard lights and it nicely disabled the PDC. Lights functioned without any bulb errors. If I plug into LED trailer, I'll likely need the adapter. I'll be building a car trailer with e-brakes over the winter, so I'll be using the wireless prodigy unit for that. Stay tuned!

Only question I have for those that tow - what do you use to cover the trailer chains or bumper trim? My chains rub on the lower lip and will make a mess of it if I don't do something.

Cheers.

__________________
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