I had the floors on my 1973/450sl replaced /welded. I picked the car up and she started and ran fine on 4/08/03. Today 4/12/03 she would not start. I boosted her and she started and ran without a problem. All of a sudden the CD player started acting strange ,cutting on and off and the car shut off. Now the battery will not hold a charge. Is there any possible connection with the weld process. Would this kill the battery . Any advice will be helpful. thanks.