If your are no longer hear the turn signals 'blink' when activated, Seat belt warning chime, door open warning chime, frost warning chime, headlight on warning chime, key-in-ignition warning chime, very likely that the Instrument Cluster Speaker has failed.
It not compatible with Mercedes W220 year before 2000. (As wire line not enough long)
If your are no longer hear the turn signals 'blink' when activated, Seat belt warning chime, door open warning chime, frost warning chime, headlight on warning chime, key-in-ignition warning chime, very likely that the Instrument Cluster Speaker has failed.