David_cls63s

Hi, I have a 2015 CLS 63s with 46k miles. I found that the car is super stiff when going through bad roads. With that, the interior starts to make super annoying squeeze noise. The tries are Michelin PS A/S 3+ (All season) w/ stock spec. Is there any way to fix the interior noise (around climate control unit) and rough ride? Thanks!!!

Cylinder Head

iTrader: (1)

Not sure about the squeak, could be an issue with your fan having eaten something (happened with my W211). The rough ride is just this car. All of the top end AMG’s, except for maybe the S have very stiff suspensions. Setting your suspension to comfort and keeping your tire pressures below 40psi will help a little.

Crawfishin

Same situation for with my 2016 cls 550, 39k miles. Very noisy, stiff ride. On the interstate it’s becomes worst. I honestly thought it was the suspension (I don’t know cars). The MB tech sort of implied “it’s just the car”. But I had a 2015 cls 400 and the ride was WAY better. I’m lost and annoyed!

Cylinder Head

iTrader: (1)

My car is smooth as butter on the interstate. I took a colleague from Seattle to Portland and back a week ago and he was amazed how smooth she was, he was expecting to need to call a chiropractor.

drjohn08318

My 2016 CLS400 4Matic is as quiet as a church mouse and perfectly tight, but not “stiff” by any meaning of the word. Perhaps I’m not surprised about the AMG; however, I would’ve never expected the 550 to be this way. Maybe you should take it to another dealership as it sounds like the last mechanic was being too dismissive.

Rehabguy

Unfortunately stiffness in a "Sports Oriented" vehicle is a must. This complaint has popped up a few times over the past few years over at the W212 forum. I don't mean to say that people don't know what they are buying, but, in many cases, people fail to understand that "Sports Suspension" = Stiffer suspension. In order to make cars "handle", some sacrifices need to be made in the form of comfort. Soft suspension = more comfort, but that ALSO = less handling. Anyone ever rode in a 1980's Town Car? It was like floating in a cloud.... trying to make quick maneuvers at less than ideal speeds would make you feel like the car was gonna flip over. You can't cheat physics. As stated above, it's the car. Best you can do to alleviate the harshness is to (again, as stated above) set to comfort mode, make sure suspension is set to softest (no lights on), do a lil research on what tire offers the most comfort (I see you are already running AS tires, which are usually softer than Summer tires). A few did mentioned that the Non-AMG E's rode much better/softer than the 63's (which I totally believe even when I have never ridden in one).
As for your interior squeaking. You first need to determine what exactly is making the noise. It could be something as simple as one of the trim panels is loose. Next time you hear it, try pressing down on the possible culprit and see if it stops. Maybe it can be popped back in or re-tightened. Wish you luck finding the squeaking part!