<https://www.renntech.org/topic/54173-litronic-upgrade/#comment-307640>
<http://schema.org/text>
"There are multiple different controllers, and a lot of chatter that they are not interchangeable:  \n \n\n\n\t \n \n\n\n\t1.) Leuchtweitenregelung Steuergerät = Lamp level controler \n\t000 044 900 38 \n\t996 618 151 15 \n\t0307870007 \n\t \n\t2.) head lamps Litronics \n\tEuropean Version\n \n\n\n\t \n \n\n\n\tfactory installed\n \n\n\n\t99663105701 \n\t99663105801 \n\t \n\tretrofit kit item (still available) \n\t99663115701 \n\t99663115801 \n\t \n\tWiring harness (retrofit kit part) \n\t99661298800 \n\t \n \n\n\n\tThe retrofit controller and wiring harness work perfectly, have no idea what the other combinations do.\n \n"
<https://www.renntech.org/topic/54173-litronic-upgrade/?tab=comments#comment-307356>