Hey, I have an older audi (96 a6) and many of the back light bulbs have gone out on various controls and switches, Ive replaced most of them at this point but the one that has me stumped is the ext mirror control switch. First off ive figured out how to remove it except disconnecting the electrical connector, do you just pull the entire little black thing off or do you pop off the purple plastic wire holder? Next do you have to just replace the whole thing or is there a way to take it apart to replace the back lights?

thanks