Have Mercedes Questions? Ask a Mechanic for Answers ASAP
My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
Most common to cause this issue here is a fault with the sound amplifier itself needing replaced.I have seen several of these fail on Mercedes needing replaced.It is located under the drivers side seat area under the paneling under the carpet if this helps.As shown below.
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When you removed the seat did you remove the paneling under the carpet to inspect for the sound amp?
Let me know if you see anything.
It does look to be under that paneling according to the picture I had posted above.You may have to remove more components on the floor to get this panel off to locate the amp but it should be under that panel.
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Usually the seat does need removed completely then the carpet pulled up enough to access any more clips or nuts/screws holding this in place.My info does tell me for sure but this is usually how this is accessed from what I recall on this here.
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