I bought my 2006 470 at the beginning of February and have loved the ML speakers. The previous owner replaced the head unit with a GROM Vline to get Apple CarPlay, which has been pleasant. However, recently, the rear right speaker below the glass window has blown, and I'm not sure what to do. I was thinking about just doing a stock ML replacement, but after reading some threads here, I can't tell whether I should go for sub replacements in the back with some aftermarket like Dayton 6.5" or Visaton or just go for a stock replacement. Another thing I was interested in was when I replace the speaker it would be beneficial to try and upgrade the ML amp as it is almost 20 years old or just stick with it and do speakers as necessary.