this applies to an 1988-1991 mercedes with the high output sound system:

If anyone has an issue with their front speaker not coming on until the volume is raised very loud dont panic, it is a simple fix. There is a capacitor soldered into the speaker cluster. removing the speaker is easy, and once it is out take it to a good electronics parts dealer and have them look at the capacitor, they know what all the numbers mean. Once they figure out what will work you simply have to solder the new one in.