Buzzing noise, engine speed related - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 04-08-2009, 11:43 AM Thread Starter
BenzWorld Junior Member
Date registered: Apr 2009
Vehicle: MB S500 W220 (2001)
Location: Warrington, UK
Posts: 5
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Post Buzzing noise, engine speed related

I have a 2001 W220 (S500) with 80k miles on the clock and all was fine until a couple of weeks ago. Firstly, I noticed that the front door-mounted speakers were not working - they have since worked intermittently. Then I noticed that when I pressed the brake pedal, I could hear a small crack in the rear speakers - similar to if a switch was broken without being surpressed. Since then, the problem has grown into an engine speed related whirr/buzz in the speakers which is there whether the radio is on or off. The problem seems to disappear after a couple of miles or when the car is warm. Any ideas please?
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