I have seen and read the DIY for removal of the speaker and plastic cover. I have an agonizing problem with my front left door speaker. The whole plastic area surrounding the speaker vibrates and buzzes when very low notes are being played on radio/cassette/cd. The buzzing sound is really the whole front plastic cover vibrating within the very badly designed frame and holders which has only one screw at the bottom to anchor the whole thing and some side and bottom breakable plastic tags and hole. I have removed the cover and no more buzzing sound and it comes back again as soon as I put it back in. The speaker is 9 years old, but still looks very clean and good. The sound is more of low range/bass than mid range although the mid range still gets out with a struggle. Don't really want to change speakers due to the mess I will get into in the redrilling of holes and removing all the speakers.......there are 6 of the larger single cone ones(2 in the back shelf and one in each door) and 2 tweeters in the dash. None of the other door speakers has this vibration and buzzing sound. Does look like I will have to find some thin tape or something to insert between the main plastic frame lining in the door and the plastic speaker cover edges.
Should prevent all that vibrations making the buzzing sounds. The speaker is not damaged and seems like there's nothing behind the speaker causing this irritating sound.

Has anyone else had this experience in their Benzs? What have you done to stop the bothersome noise? I am pretty sure the speaker itself has not gone south? Thanks.

1994 Euro C180.

why dont you try putting some silicone behind the grille... maybe it'd stop it vibrating.

try to do it nicely so it wont be visible

I agree with the previous response. Get some 100 percent silicone caulk, like bathtub or aquarium sealer. Try to find a matching colour or clear. Run a heavy bead around the outside perimeter of the plastic grille from behind so as it is not visible from the front side. After it cures, it will help to "de-tune" the grille piece. Your spearker is most likely not the cause of the resonance. I have also used strips of self adhesive velco to dampen vibrations. Use 2 pieces of the fuzzy side "back to back" between offending surfaces. You can ad a dab of silicone sealer to all screws and washers in the area to insure that they don't rattle. There are some commercial sound deadening materials available too; search this forum. When all else fails, switch to classical music. Good Luck. Tod

P.S. Don't speakers down there "go north" when they fail?

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Thanks guys for your valuable inputs. I will be trying the silicone treatment soon, but am quite worried about the potential damage it would cause to the plastic parts. Have any of you tried this and what type of silicone to use....acidic or non-acidic like for fish tanks??? I may try the sticky tape treatment first as this is definitely non-damaging. If this doesn't allow enough of the vibrations to be curbed, I will try the other way. Please let me know about the silicone to be used and whether anyone using this has got any damage to the plastic like warping and melting. I looked today for some replacement 2 or 3 way hifi speakers and don't know which will fit the W202 door and rear shelf. The diameter of the speaker and frame have to fit without any major alteration except drilling new holes. The rear door speakers look smaller than the 2 front ones. I cannot see the size of the rear shelf speakers. I also notice some coils or elect. condensors attached to cut down the high notes or low notes. What is the ohms of these speakers and their outputs? Will 2 or 3way speakers fit with those bigger magnets on the back and the higher fronts caused by the midrange and tweeter settings?

I will only adress the silicone issue. I have used the 100 percent silicone clear bathtub sealer with great success. Read the last as: not the stuff which is partially laytex. I didn't know that it came in acidic or non acidic varieties. If the speaker doesn't buzz without the grille, why replace it? I don't believe that any aftermarket speaker of the same size will sound any better than the original if the original is not damaged. Tod

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Resistance is Futile.