I highly recommend that you get Z2 and ZFX (at minimum).
Z1 is the old "primer" that works well but takes forever to dry. It has now been replaced by ZFX.
Z3 is just like Z2 but is used on surfaces without clearcoat.
Other things you might want to consider are Z-6 Gloss Enhancer, Z-7 Car Wash soap, and Z-18 Clay bar. Or just get the Zaino Total Protection Kit, which includes all of these fine products.
Since your car is relatively new, the clay bar isn't a necessity but that also depends on how anal you are about the car.
Z1 is the old "primer" that works well but takes forever to dry. It has now been replaced by ZFX.
Z3 is just like Z2 but is used on surfaces without clearcoat.
Other things you might want to consider are Z-6 Gloss Enhancer, Z-7 Car Wash soap, and Z-18 Clay bar. Or just get the Zaino Total Protection Kit, which includes all of these fine products.
Since your car is relatively new, the clay bar isn't a necessity but that also depends on how anal you are about the car.