I picked up my GLC43 in November 18. I noticed that on full lock it had this awful bumping/knocking noice from front wheels. i contended the main dealer & was told there was a fix to correct this. Why they didn't do this before i collect the car i don't know!!! When i got a call from the main dealer he told they were going to changing the tyres for a different compound. When asked if this would correct the problem I was told no but it would make it better. I was told to contact Mercedes if I wasn't satisfied!!! I have had a couple X6's, one a M50d, with no problems at all. I'm beginning to wish i'd stuck with BMW. I'll just have to see how it is when I get the new tyres!!
Welcome to the Forum, read the Mercedes GLC Clonking thread 100+ pages, that's the problem you have.
Adding your location to your profile would help you get answers as a lot of issues are market specific.
2017 GLC AMG43 premium plus, night pack, leather, intel lights, 360 camera, side steps. = sadly gone
Now GLE450 Premium plus, Selenite, Black/White Nappa leather, Tech plus pack, Driving assistance pack, Tow pack, Off road pack, 22 inch wheels.