Audio System - Intermittent Vibration Noise From Woofer

VIBRATION NOISE FROM WOOFER

Topic Number LI82.62-P-047989

Version 1

Design Group 82.62 Loudspeakers, amplifiers, antennas

Date 09-17-2009

Validity MY 2005 and later 171 SLK

Reason for change Technical content updated/Supercedes DTB P-B-82.62/450

Reason for block

Complaint:

Intermittent vibration noises can be heard from the woofer in the driver or passenger door.





Attachments

Cause:

The magnets of the woofer in the R171 do not always have a uniform black surface. So that these magnets are not visible through the speaker covers (speaker grilles), black self-adhesive stickers have been affixed to them. Sometimes these black stickers become detached and can cause vibration noises.

Remedy:

Completely remove the black sticker from the magnet of the woofer. Any areas that are visible through the speaker covers (speaker grilles) must be colored black.





Symptoms








Work units





Validity





Attachment - Partially detached sticker on speaker magnet.