Review on PAC RP4 CH11 Replacement Steering Interface by Justin Ritter

This device replaced the previously installed ADS Maestro for several reasons. This unit alone holds the rear entertainment system in my 300c, the Maestro doesn't. Another reason is that ADS has no idea how to fix this problem and when I bought Maestro it promised to keep some other features but it didn't happen. It was supposed to store the information sent by the GU to the EVIC, but it didn't. PAC Radio Pro too, as far as I know, but didn't claim it would. According to my installer, the RP4 was very easy to use and unlike the Maestro it was pre-programmed. If PAC could update this to send radio and nav signals to the EVIC I'd be in heaven.