iDatalink Maestro ADS-MRR RR Interface ModuleiDatalink Maestro ADS MRR RR Interface Module Connect a new stereo and retain the steering wheel audio controls and factory amps in select vehicles This is the iDatalink Maestro ADS MRR, the world's most advanced aftermarket head unit interface module. Compatible with a number of vehicle specific t harnesses, this module can make installing an aftermarket head unit in many new vehicles much easier. It will retain your steering wheel controls, retain