AudioTronics is a CAN Bus & Bluetooth module which acts as a gateway between your smartphone and your Mercedes-Benz car. It provides endless functions, among which the most important are: restoring original functionality of the Command unit with any aftermarket radio, using voice commands (Siri) to operate several things in your car, such as: 'Siri, raise the passenger's side window', reading (basic) diagnostics information from your car, etc.