I am told the dash power outlet can easily converted to be "hot" all the time - not just when the car is running.

Anybody able to tell me how to do this?

Thanks!

 

Look in your owners manual. It involves moving the Cigar lighter fuse to a different position.
When You locate the fuse there will be three holes....1+2 is battery, 2+3 is ignition.

I may have them reversed, but you get the picture...

 

In the Rear Fuse box (In the Trunk) Look at fuse 18

Rear Fuse panel

 

Is this only for the 2010 models, or all 300 models?

 

Actually everything going way back. The first time I saw this was A 96 Caravan. The locations and fuse Numbers will be different , of course, but it will work on just about everything.