Hi Folks, I'm new to this forum since selling my Z3 and purchasing a Z4. Hopefully somebody can help me with my problem. The nav system can't detect exactly where I am. Sometimes it's close and other times it has me somewhere in the Atlantic Ocean. The maps seem to be OK. I have a 2007 coupe with tinted windows ... not factory tinting. I suspect that this may be my problem. Has anyone else had this problem?