Wonderful response and I thank you for the time...I have spent hours researching and trying to figure out my lack of sound from my door grille speakers..I have tried to use a high powered flashlight to see if I could look through the grilles and see if I could see the speaker, no good.
I found a wiring diagram enclosed below, (also a picture of the car).
As you can see the radio has 4 outputs LR front and LR rear outputs....SO wheres the door speakers?
So where do the door panels get their sound from, Possibly the amp in the trunk wheel well?
I looked at the amp in the trunk and the connections are good...so maybe the amp has a blown channel.
I have contacted a Florida outfit that will look and fix both the amp and the radio head unit after I said I had a popping in my rear speaker, the man said to send in both the units..a bit pricey, $350.
Any ideas would be appreciated.
Dear Dallas John,
I too possess a 95 E320 Cab......my pride & joy!
Just for your consideration.....
First, it's quite time consuming to access those rear speakers. Seat bottom, seat back, and finally the side panel will require removal.
Yes, those grills in your doors do contain working speakers. In typical Mercedes fashion, the sound system is quite complex. In existance is a crossover network delivering to your doors, most specifically....bass.
Naturally, the dealer's are always an expensive route to go....however, they should know our cars, and get it right.
My suggestion would be to seek an indepenent high end sound system installation shop....lot's exist, and get their estimate. FWIW any stereo guy will insist (rightly) that both L&R rear speakers match, and if not in possession of an OEM speaker they'll then want to remove both side panels. Perhaps big $$$'s, and right back where you started.
So, perhaps the best option is to ask their estimate to R&R an OEM correct speaker that you've found online for less than $100.00....(does sound quite steep) and supplied with the hopes their labor price will be less.
Kind of how much trouble are you willing to go to......to save some money.
Lastly, there remains enough expert advice on Benzworld to DIY if willing.
Actually, my intention is to remove my 95 cab's rear seat, seatback, and sidepanels this weekend, and should be in a good position to guide you through the process.
Again, if you're feeling a little brave.
Feel free to PM me, anything I can do for a fellow Mercedes enthusiast.