Observations on the 2014 CLS550-4
1) ECO start/stop. Works as you'd expect though I find the restart to be somewhat noticeable - feels like the transmission is trying to move the car while the engine comes up to speed. Sometimes not a smooth transition. While on the topic of transmission, at lower speeds sometimes the transmission can't decide which gear to engage. Somewhat clunky at times. You get the impression if you accelerate quickly the tranny knows exactly what to do; pull away slowly and it's not sure. Maybe needs to break-in some more.
2) HOLD function. This is probably my fault but I can't seem to predictably engage it. I've been successful once or twice but can't figure what I'm doing wrong the rest of the time. Watched all the videos without success. Need to ask at the dealership.
3) Folding mirrors. The do fold but only if you push on them. There is a section in the digital manual which directs you to a button between the side mirror adjustment buttons which will fold the mirrors in/out. Problem is, there is no button, just a space holder. My garage width is such I would like this to be operable. No joy.
4) Distronic PLUS. Works as expected and quite well though not as I would have thought. Stop/go traffic is where it could really shine if it were implemented differently. In traffic the car will slow and come to a stop if the car in front does so but when the car ahead restarts, you have to re-engage the Distronic to get the car moving again. First time I tried this I was sitting waiting for the car to restart after traffic cleared and wound up getting a few horns from behind. My bad...
5) Road noise. Not a big issue but it's more than I would have thought. Not sure whether my expectations for ~$90k car are too high. No, I am sure. My expectations are about right. It came with Conti ContactPros which aren't the quietest tire available. If they are like most tires the noise will increase as they wear. Need to review tire options.
6) Garage opener buttons on the underside of the rear-view mirror. Again I realize I'm picking a bit but they are inactive if the engine is off. Pull into the garage, put it in "Park", shut off the engine and you'll have to set the ignition to at least "accessory" to close the garage door. Guess I'll have to get used to closing the garage with the engine running if only momentarily. Not a huge issue but could have been implemented differently.
7) Colored guidelines on monitor while in reverse. They're there though with Parktronic not sure how useful they are. Don't need the tennis ball against the windshield trick anymore. Position within the garage is predictable and repeatable. Sold on it.
Please don't think I don't love this car. I've avoided all the hyperbole associated with typical reviews because they are all true and can be read elsewhere. You should buy this care immediately. If not sooner. But if I were the head of design at MB...
Have a great day.
Scott

It seems mercedes hasn't added the automated wing mirror folding option yet...which never made any sense to me. I have been wondering if the wiring is in the casing, since that would enable us to wire it up ourselves.
The garage door buttons in my car only work when I turned off the car and still have the key inside the cabin. The moment I take the key outside the cabin, the garage door opener does not work.

The hold feature is pretty weird, I have to admit. My old VW CC had a physical button in the console (where the unused button is to be precise) which enabled the hold. I wish MB did that, since it would have been so much easier. I noticed that if you have to push the pretty hard the second time (it feels like you pushed it farther than normal), the hold is activated.
Have a great time pushing that v8 biturbo!
Just a little bit of comparison...







