I'm not familiar, but the company that makes it should be able to help you.
It sounds to me like something is sending feedback through the system. Maybe a bad ground or soemthing..
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.