My 2013 GLK 350 has a problem that's very apparent in the cold. The steering wheel makes a groaning noise like it needs oil when I turn it left or right a quarter way. It sounds louder as I turn it quicker. I don't think my GLK has a steering pump so I can't fill it or anything. This one is electric. Could it be a bad steering assembly? Or do some bushings need to be greased somewhere? Thanks!

 

I have not read anything here about other electric steering issues.

Are you still covered by the factory 4yr/50k mile warranty? If so then take it in and have them look.

 

I have the same issue, it happens when car is cold and turning at low speeds. Mine is a 2013 GLK 350

 

Could be the Macpherson strut. Have someone listen right above the front wheel as you turn the steering wheel. Does the sound stay as a moan when you hold the steering wheel to one side or another or only while turning the wheel. Need toisolate the noise.