i got my 2016 GLE350 a couple of weeks ago. I got the standard sound system. I was originally disappointed with the sound system, wishing I had added the upgraded sound system, especially since there was no bass. I adjusted the bass, mid and treble, and was still disappointed. Then, I adjust the fade. I put more volume toward the front, and then there was the bass! It made a dramatic improvement to the sound. I'm much happier, but I do wish I had looked into the HK system before buying. If I was to do it again, I'd definitely listen to a car with HK and compare it to a car with standard before ordering.