Rear bass amplifier on my 2014 E350 starting popping, crackling loudly. Have had this repaired twice before on the same car, both times under warranty. Can't believe they can't fix it to last more than 2 years! Car no longer under extended warranty, but will be insisting they fix it again as if it were, since the problem is likely more than just the amp, but they haven't dug any deeper in the last 2 repair attempts.

Rear speaker on my E350 started popping, crackling, with a burning odor. Replaced the rear bass amplifier (for the second time on this car) while still under warranty.