Welcome. I have found it useful to remove any aftermarket electronic equipment when chasing parasitic draws. Radio, radar detectors etc. I’m 3 years into ownership of my 02 with 36,000km. I recommend pulling off the front bumper to check the condition of and clean the radiators and install a mesh if one isn’t there. I just finished chasing suspension noises which were coming from upper mounts, go with 997 versions, and lower control arms. I see the original rear spoiler is gone. Yeah!! You don’t have to deal with leaking hydraulics. Like any Porsche they like to be driven hard. Enjoy.