Facelift tail lights
I had to bay these ones when I installed the M rear bumper. They where also installed without the facelift light module.
To get them to work properly I had to rewire the driving lights from the licencelights, and brakelights from the 3rd brakelight. Another issue was the yellow warning light at the instrument cluster had poped up. To get rid of that I had to install four resistors.
Used this nice HOW TO:
http://www.z4-forum.com/forum/viewtopic.php?f=2&t=17666
Now its all perfect, and its looking good with the leds