My review is for their service department. Very poor services and disappointing experiences I had there.
First, I had some issues with my fuel and MPG and ask them for a quick check. Without telling me, they put more than 110 Miles on my car which I think they could do the test with less millage or at least they could tell me before that and could ask for my consent. At the same test trip by Mercedes of SLC, a rock chip occurred on my windshield which they repaired and again extended later and they just repaired again. Now I have an ugly repaired rock chip on my windshield which goes back to that long long test trip by Mercedes Benz of SLC.
Second, few month later, I had an issue with my engine. Engine light turned on and the high pressure pump failed. I took my car to SLC Mercedes Benz they gave me a loaner car and kept my car for about 3, 4 days. Then they called me that the part is not available and we should order it from Germany, You should bring the loaner back and drive your car with the engine light on since they believe its is not a bad problem. After about 60 days they never followed back and when I call them they keep saying we have not heard anything about that ordered part yet (waiting from January 2018).
Once I talked to the same dealership for a recall schedule for November 2017 and they have been supposed to call me back for that which never happened.
Comparing with other dealerships like BMW that I've been in touch, I have received worst services, less respect and follow ups and more expensive services. For example if you buy a part from BMW like a door light projector you just need to pay for part but in MB of SLC they ask for part and labor which is sometimes more expensive than just the part. Other example is detail services and so on.