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Hi Guys I've posted before about this but really stuck ,the rns-e unit in my 05 allroad is totally blank & wont switch on i removed the unit ,applied 12v to kl30 7 kl31 it powered up ,i entered the code & all looks normal ,when i connect it to the wiring harness again ,i still have voltage on...

hi there got an a4 auto .im tryin to change knob but no one seems to know how.para creepin in