I posted this on the Car Audio site but go no hits. I'll try it here too.

I am almost totally clueless when talking about stereo components. I am looking to replace the stock speakers in my '94 E320 wagon. I think they are 5"(?) Speakers. I would like to change the front dash, lower front door and rear door speakers. I currently have the stock radio (what kind is it - a Becker?). Can someone give me a recommendation as to what brand speaker to put in and where to get it? I also have future plans to finaly put in the CD changer. I've heard that putting in an Alpine is cheaper than what MB puts in. Is this true?

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dtf
1994 E320 Wagon (Died @ 308,669 miles)
1995 E300 Diesel (228,000)
1999 E300 Turbodiesel ( died @ 255,000)
2006 Toyota Tundra SR5 AC 4X4 (115,000 miles) rusted frame - sold to chop shop
2011 Audi A4 Avant (165,000 miles) Seized engine - donated to Salvation Army
BMW 330 xi 6 speed manual (175,034 miles)
2014 E350 4Matic Wagon 128,000 miles
2018 Dodge Ram 21,000 miles