Originally Posted by
Thomas Barbaruolo
Thanks, we have had some slow engine turnovers plus it is the original Varta battery. Sure wish Costco sold a battery that would fit. They said they don't. 
PNA...any thoughts on what lubricant would be best for seat rails? There isn't anything stuck under the seat and our friends 2005 Roadster is making the same horrible sound. Thanks again!
If you have the original battery, sounds like the culprit.
As far as the grease, you could check with the dealer to see what they would use. You could also check the service manual to see what they say about lubricants. I'd look but I can't right now. I do know I used white lithium grease with my spoiler when it was squeaking. It worked great. It comes highly recommended for most uses. I purchased it at my local auto store.