OP... for the tail lights to light up(LED bars) you will need to have the headlight switch set in the AUTO position. When the headlights are turned on manually (ie set to off or on) the LED tubes in the tails WILL NOT light up.
Set your headlights to AUTO and report back. 
Also note... IF your car is parked and your constantly locking and unlocking the car... after a few cycles the tail light LEDs will not light up. I think this is a safety feature as not to drain the battery.
Btw... the #282 (#63212225282) Blackline kit is the correct xenon kit for our cars.
PS: When your car's SW is flashed to a new version... often times you will need to go into the BC and reset your preferences for things like lights flashing when locking and unlocking, how long your lights stay on for when parked, and how many times your turn signal flashes(3x's vs 1x's).