Maserati is currently busy working on a facelift for the Quattroporte
This prototype was snapped testing on the roads around the German Nurburgring race circuit. The changes appear to be focused on the front fascia with a small alteration to the rear bumper. The camouflage suggests that in addition to changes to the front bumper air-intakes, Maserati stylists may have made some changes to overall grille shape, and to the headlights. The changes amount to the normal mid-cycle facelift, which should go public early next year, perhaps at either the LA or Detroit auto shows.