Title pretty much says it all. The Nav unit under the passenger seat in my wife's 03 100 has been dead for a while. I recently stumbled upon the Vline from Grom audio and it looks like it would modernize the whole vehicle and alleviate the need to replace the nav unit. I'm just wondering if it will work like I think it will. The guys at Grom weren't sure. Apparently the guy who did all the compatibility testing is no longer with the company.