Got an old 1995 300E diesel, (I believe it to be a W124 body) and wanted to replace the speakers. I believe I have the 6 speaker active bass, two in the front door, two in the dash, and two in the high rear. I believe the sizes are 4 inch for dash, 5.25 inch for door, and 5.25 inch for rear.

I intend to replace the head unit, and I was figuring I would only run the door speakers and the rear speakers. As this car is very old, I purchased some 5.25 Polk Audio speakers to place in the door (I understand they only run bass right now, but once I get the new head, they will run the typical full sounds) and am awaiting to purchase the new head in a week or two.

So I've been googling and figured how to take apart the door (unfortunately I appear to have fractured the cheap wood particle board in two places but I don't care).

To my surprise there is a weird speaker enclosure which I was not expecting. So the 5.25 Polk Audio speakers I purchased indeed do NOT just fit right in like many blogs stated it would.

So what do I do now? Is there a website that sells the specific product to make my life easier? My current plan is to get some wood product, cut out a shape, and mount the speakers on onto the wood product with screws.

Any suggestions?

I have indeed googled, binged, and searched this website. It appears many people are frustrated with noobies who don't do their research. I assure you I have, if I missed something I apologize and would appreciate links to my specific question, not just random info that may or may not assist me.

Thanks .

Save the old factory speaker frames but cut out the central magnet assembly and cone. Cut through the struts that connect the perimeter of the old speaker to the 'hub' after measuring carefully, with a Dremel cutoff wheel or similar. You now have a bracket that is perfectly mated to the original speaker box, and if you've measured correctly, you can mount the smaller 5 - 1/4 speaker's rim to the truncated struts.