GLC phone holder
#76
Did you see that in the post immediately before yours I have linked some videos showing how to lift the central console?
Once you've done that it is very easy to run the cable through. It makes bit a lot easier to use Android Auto or Apple Carplay.
Good luck.
#77
I am not a big fan of magnetic holders. I do like the gravity mounts, like the one on the photo. Behind the mount on the air vent sits another, small one. Its sole purpose is to block the vent from moving sideways. Thos particular holder supports wireless charging. Maybe one day I have a phone with that function.