I am currently upgrading the radio in my 1977 Mercedes 450SLC. It currently has a Pioneer MP3/CD Player I had installed not long after I purchased the car in 2003. The Pioneer came out of my old 300E and was installed in early 2002. As well as the Pioneer CD player, the car also had Pioneer speakers. These pre-dated my ownership of the car. Looking them up online, they appeared to be late 90s vintage, and were sold as drop in speakers for Chrysler models. They had connectors I had not seen before, which must be the Chrysler connectors.
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