I recently bought an '87 300SDL. When I removed the lower cushion of the back seat to treat the leather, I discovered a black metal box lying on the soundproofing on the driver's side. It's black and measures about 3 x 7 x 1.5 inches; there are two cables running from the box into the trunk area. It isn't secured to the car.
There's of those helical cellular telephone antennas mounted at the top of the rear window, and between that and the fact that this box says "Motorola" on it, I thought at first that it might be an amplifier for a built-in cell phone the car might once have had. But then I realized that there are no wires running forward from the box toward the front seat area.
Anybody have any idea what this thing is?
Geoff