Found these links stating some updates on the MY2012 370z which includes a snow mode button similar to that of the G37, a new TPMS stating psi of each tire, and apparently a revised suspension. I cannot confirm the legitimacy of these articles but it caught my attention. Maybe it's for Europe version only, who knows??
Motor Mania Buzz: New Car: 2012 Nissan 370Z (EU)
2012 Nissan 370Z | Car News | Car Accessories | Car Relaes Date