Radio/tape Cd Player problems of the 2011 Dodge Grand Caravan

Van was in motion on city street (taking daughter to school) when it started shaking and then there was a burning smell. Auto shop said it's electrical but has referred us to dealership for further auto service because whatever caused burning smell "shorted out the radio / information control unit" the van is not safe to drive with this issue or it could catch fire.

1). Noticed that the area around the rear left side of the vehicle (interior) gets hot. It is not the speaker as the speaker is working properly and the area gets hot even when not using the radio. My concern is that is the side where the gas pump is and hoping this doesn't cause a fire or explosion. Our 22 month old baby sits on that side of the van. 2) noticed that there are scratches above the rear wheel hub on both sides of the van, from both sliding doors. 3) there is a hard shutter from the automatic transmission going from 1st to 2nd gear, whenever the speed hits 10mph. The shutter causes the vehicle to have a clunking motion. 4) whenever I start the vehicle, the rpms will shoot up and down after 2 minutes, before getting to normal idle.