I replied to your question down in the 5 series section. There have been similar complaints from owners w/ the SMG transmission. If you do have the SMG transmission, I recall it was software related and resolved w/ a software update. I'd press your dealer to check through the BMW bullitens (TIS I think they call them) about tranny problems on the the '04 5 series. If you don't have the SMG, don't know what to tell you because w/ no codes in the computer, it's likely your dealer will simply give the carback w/ the old "unable to replicate" response...