I am thinking about installing a DVD system in my 300 but i have herd of people losing the radio controls on the steering wheel after the system is installed. Is there any way around this? Can i hook up an adapter or something that might bypass this problem from accuring.

 

there is a part you can buy made by PAC. its a steering wheel control interface. the model is a SWI-X. its a universal part. if you go to there website you may be able to order it. its probably going to be around 100 bucks.