Can someone confirm the radio harness required to retain or not error out the Dash screen in a 2010 Limited? I have the REQ Media Center 230 system no amps i dont think, with steering wheel controls. Ive seen numerous harness's and none have much detail on what they retain or what one you actually need. Metra is useless, and PAC looks to be what im looking for but at $199.99 i want to be sure.