Hi Jim,

I no longer have my 1982 R107 but believe you only have two speakers. one each below the the HVAC vents. If you remove your OEM Radio I might suggest that you keep it in a safe place so that when the day comes you decide to sell you have the original equipment. Additionally, if memory serves me I had some issues with the replacement speakers and ended up sending them back in exchange for different speakers. Lastly, when you go to remove the stereo if it has not been removed previously it will only 'come out' a short distance then won't budge. If that happens reach around the passenger side under dash and remove a 'stud' that is screwed into the side of the unit (horizontally) keeping it from being removed. I'm assuming this was an anti smash and dash feature...

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82 380SL 41K miles sold, 98 SL500 44K miles, 13 C300 4Matic, 14 CLA-250 4Matic