When I drive my car and use the stero, all speakers work well. When I swithc to CD trunk player, the sound is so much better, then once I hit a bump the left front speaker goes out. Then maybe a block later it comes back on and then a bump later it goes out again.

I cannot see the radio face as it is no longer clear, it is black across the middle so I have to adjust by ear.

Suggestions other than getting a new susyem, I like keeping all the old stuff in. 1998 C280.

Thanks,