Partially right...I live in Arizona and my 991 develops rattle at a weekly rate. The first one (very severe) was finally fixed after two service trips. The most recent ones are not so annoying. I have asked my wife to help me find the source but she does not want to be bothered. So, I think unless they get worse, I am actually stuck with them as I also do not want the serivce techs to make things worse.