Rs6 c7 2014 facelift

[Kibzrs6]

Hi wondering if some1 can help, i decided to facelift my rs6 c7 2014, i have purchased my headlights, front bumper, rear taillights(2015).. I was going to purchase a rear bumper but the owner told me it wont fit my car, unsure why he said that but after numerous times of contact I couldn't get through to him to know why he had said that, this has now put me on hold to get 1 can some please help me that may have carried out this conversation. Thanks