Help I purchased a 2015 c300 that is equipped with all options 355 preinstalled navigation retrofitting 522 audio 20 and 270 GPS Antenna required for Plug and Play Garmin Map Pilot SD Card. I purchased card online brand new sealed package when nav button is pressed it tells me software not loaded. When I go to media and choose Sd card it says no card loaded. I sent back card and they sent me a new one same thing. Everything I’ve read states it should be working can somebody give any ideas?