Yeah, I was suspecting that was the case. I am definitely replacing the speakers. At 25 years old, they have definitely seen better days. Thanks for the reply...

__________________
Mine: 1987 MB 420 SEL - 66K (Dec 2019)
Mine:1991 MB 350SDL - 244K (Aug 2011)- Totalled 9/14/2016
Mine:1981 MB 300SD - 326K mi (July 1997)-sold
Wife's: 2008 MB C300 Sport - 110Kmi (April 2009)