My Z3 had critters last winter... Yup the four legged and tail critters. Luckily I did not have any damage. Just a nest above the gas tank. Although I plan to drive her this winter, I am lining my garage with moth balls. I was told to even leave moth balls on the garage floor beneath her. If in the spring you have that smell of a barn in your car, you have critters.
This is my toy. 1998 (2.8)