DIY How to fix buzzing noise from door speaker in a Mercedes-Benz

Step-by-step instructions on how to replace a bad door speaker or a blown door speaker in a Mercedes-Benz E-Class. If one of the speakers in your car has “blown,” it’s time to replace it. Do you have serious sound distortion when you play any music? Older speakers wear out and start to crackle, even if you don’t blast your music. When a speaker blows, it makes a noise you can’t miss, and the sounds it emits are distorted. This article will show you how to replace a speaker on an E-Class W211. These instructions should also help CLK W209 and CLS owners.

If the noise is coming from a rear subwoofer, disconnecting it temporarily can help confirm the failed speaker. Subwoofer location and wiring vary by body style and audio system. You may want to unplug the wire until you can replace it. You will not notice much difference in sound quality without the subwoofer unless you always blast your stereo.

Tools Needed:

Mounting Wedge Part Number 110589035900. This highly-ranked kit on Amazon should work as well.
T-bit socket set
Screwdrivers

Parts Needed:

For new speakers, see the link here

If you need a temporary fix, try to use the Fade and Balance buttons on your car stereo so as not to route sound to that speaker. For example, if the front passenger door speaker is bad, set most of the sound to the rear speakers and shift the balance slightly to the left. This is not a perfect solution, but temporary until you get the time to replace the bad speaker.

NOTE: DISCONNECT THE GROUND WIRE FROM THE BATTERY FIRST.

Remove the triangular tweeter trim near the mirror, disconnect the tweeter connector, and set the trim aside.
Use a flat plastic object (or flat-head screwdriver) to remove the cover near the door lining.
Unscrew the Torx screws shown below.
Unscrew the door lock pin until it comes off.
Remove the cover behind the armrest.
Unscrew the two bolts hidden under the cover.
Use a trim wedge to release the door panel clips. Pry close to each clip to reduce the chance of breaking it.
If any mounting clips break, replace them before reinstalling the panel.
Lift the door panel and move the panel a couple of inches away from the door.
Disconnect the interior door handle release cable from the door panel.
Disconnect only the electrical connectors attached to the door panel. Leave the remaining door control module connectors in place. Note: Don’t unplug every connector from the door control module; only the wires to the door panel.
Carefully peel back enough of the moisture barrier to access the speaker. Reseal the barrier during reassembly.
Unplug the electrical connector to the speaker.
Release the locking tab and rotate the speaker counterclockwise to remove it.
Align the replacement speaker and rotate it into the locked position
Reconnect the interior door handle cable and all electrical connectors removed earlier.
Install the door panel by sliding it down into the upper channel near the glass. Make sure it is fully seated before installing the fasteners.
Push the door panel in and install all the screws you removed earlier.
After reconnecting the speaker and electrical connectors, test speaker output, the interior handle, door lock, window controls, mirror controls, and any door-mounted lighting before installing every screw and clip.

If one door speaker fails, consider replacing the matching left and right pair. Even better, you can replace all of them with upgraded speakers. Before buying aftermarket speakers, confirm the speaker size, mounting depth, impedance, and factory audio system for your vehicle. If you look at Amazon, you can find a set of upgraded speakers for around $50.