So I am rolling around in my 1988 W461 SWB Danish Army with the OM617A & 5-speed Ironbox and no stereo, so I needed to fix that.
I decided on the JBL GTO 509 C component speakers and the VDO (aka Continental) with the blue lights for a 12V system as I am converted over to 12V already. They have 24v models available.
Radio – shipped from Germany in about 20 days
Radio ISO DIN adapter from Amazon
JBL GTO 509C speakers from Amazon
120mm Hole Saw from Amazon
3M double-sided tape (to hold the little cross overs to the lower dash panel.
The installation is fairly straight forward with the exception of cutting the speaker hole, this is by far the most daunting task, as there is no return once the metal is cut.
Step 1. Remove most of the dash
Step 2. Look and look and look and look where stuff will clash under the dash.
The main challenge of cutting the holes is placement. On the glove box side, a speaker that is too high will hit the bottom of the glove box. On the fuse box side, a speaker to low will interfere with the relays on the fuse block. So take notes and mark up the metal on the underside.
I removed the passenger seat, so I could lay down in the floorboard and look up to the cavity under the glove box. You can’t spend to much time looking for clash issues.
Step 3. Test your equipment, and if it all works properly remove the lower dash.
Step 4. Practice layouts and once you feel confident the speaker is located mark your center point and drill a small hole.