I have a 1998 E300 TD. I do not drive it too much as I only have 30,000 on it. I have never used the second key for it and today when I decided to try it (it was sitting in some drawer in the house) I noticed that it didn't start the car. I called my local dealer who told me that a replacement key was $80. I find it strange that Mercedes would charge for a key which has never been used and defective. Was/Is this an issue with the E300 TD key? Any suggestions? Any information would sincerely be appreciated.