a spring loaded mechanism is probably malfunctioning. not something that will fix itself, and will likely get worse. i drove an audi a6 for a while that had a similar problem. you can either deal with it, or just get it fixed.
color: anthrecite metallic
wheels: style 89 E66, 19X9F 19X10R
ext. lighting: 8000k D2S & LED plate light
*want to get sport rear diff*