No expert Muks but doesn't the command system get the tom tom traffic information via the built in sim card.
I have a galaxy S8 and it connects brilliantly.
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.