Proud new owner of a 92,700 mile Lunar Blue Metallic 2014 GLK 350 RWD that has lived in Orange County, CA since new. Solidly built and still as squeak-and-rattle-free as a new Benz, I'm guessing it must be some kind of base model as it isn't equipped with the rearview mirror garage door buttons, sunroof, or electronic lift gate.

I've used the search function, but can't find a definitive answer to this question: are the tweeters in the door A-pillars easily blown? The whole car feels like new except for these tweeters, which sound painfully distorted. Are blown tweeters in this car a common problem? Thanks in advance.

 

Common problem - no - get the part#'s for the tweeters and plenty of eBay replacements

 

Go to a local stereo shop and upgrade all speakers , and you have a hidden eq in the Maintenance section of the stereo

 

Do you have a manual , I think the 3 button mirror is standard .