yeah i read somewhere that you should just invest in the oem harness so you can do that. probably makes legality a non issues...i just want to pass inspections so if it doesn't pass i know next time to swap it before i go get it done. If i go with the black cg headlights then ill go with the mercedes tail lights...if i get the headlights with the tube led in stead of individual leds...it'll match the bmw one you have perfectly. not sure yet but i really appreciate your input. do you know any post that tells me which wire is witch? i am great at wiring i just not no great at no chinese! lol
Funny you mention the tube LED for headlights.... I went with those as well (Those were plug and play)
As for the wiring - I really wanted to do a write up but in the 4 hour process I was just so focused on getting it right - maybe when I have time ..... However - what I did is this:The OEM wiring is self explanatory as you know where your city light, brake, turn, and reverse wiring is as the bulbs and sockets come with the harness. For the Chinese taillight, after cutting the connector off, I just connected the ground and then tested each power line to a 9v battery (ground touching negative and then sticking each of the other wires to positive) - even though it isn't enough voltage to fully power the LED's it was enough to light them and indicate what wire went where. The good thing is that internationally black seems to always be ground, if not black then green. In my case the BMW taillights came with a black, Green, red, white, and yellow.... lol. Plus if you ever connect LEDs backwards like those map light bulbs they just wont work - so you never have to fear blow out when testing.
P.S. Also included an old pic I took of the rear when I received the taillights. If you notice the White wire was the longest and therefor was the backup as the BMW style relocates it to the trunk side and the trunk piece also came with green/black same as the main piece green indicating city lighting black being ground I was able to tell this from the mini connector and how it connected to the connector on trunk side. As the trunk side connector WAS plug and play - just not the main side.
Good Luck!