Axxess AXDIS-MB82 radio data interface W/ SWC wire harness Mercedes GL/ML/SLK/E Class( W/MOST25 amp) 05-12 models. When replacing the OEM radio in select vehicles some features will be lost or not function. This radio data interface will retain those features and provide Nav outputs for multimedia radios. This interface is designed for OEM amplified audio systems. Retains the audio controls on the steering wheel.