Hello guys. Yesterday I received a MERCEDES C117 CLA CLA45 AMG LOOK GLOSS BLACK REAR DIFFUSER EXHAUST TAIL PIPES for my CLA amg line. I am not sure how difficult the installation is. Do I have to remove the entire bumper or can I button it up without removing it? Can I do it alone at home or do I have to go to a specialist? If you could tell me the steps of the process would be very helpful for me. Below I attach how it is my bumper now and what i ordered.