I work on M-B cars every day so it was super easy for me..............took 10 minutes using hand tools.

To make things nice and easy it's best to jack up the vehicle first and put it on stands. Then you can remove the two(one on each side) torx T20 bolts on the edge of the bumper inside the wheel well holding on the fender liner. With those out you can open up the fender liner and have access to the 10mm bolt and 10mm nut holding the bumper to fender on each side. While in there you can easily unplug the sidemarker lights by a simple 1/4 turn of the socket. Then there's 3(one on each bottem corner and one in the center) two piece "rivets" that hold the fender liner bottom edge and main splash shield in place. After those are out you can remove the front lower bumper grilles by simply pulling on them with your fingers or a small hook tool. Once those are off you need a short 10mm socket and ratchet to access the 2 10mm nuts that bolt on backwards through the bumper into brackets on the car. You will not be able to see the nuts and must remove them by feel. Once they are off you can remove the 2 torx T30 bolts on the top edge of the bumper near the headlights and the 4 8mm bolts holding the big front grille on. Once all that is done you can pull the bumper off the car about 6 inches and disconnect both foglight assys. and the ambient temperature sensor......................and you're done. Simple as that. LOL