The wire diameter of your tool is also important..(no I'm not going there
). Too big and it won't insert all the way. Too small and it won't release the detent enough. I just went through this with a 95 W124 2 hours from home. Standard clothes hanger is to big, but the cheap white painted ones from the cleaners are just right. Also an electrical staple won't work, nor will a large paper clip. Its also important to file the ends of the tool with the proper slash point so that it can get behind the detent. Good Luck!