To be honest, everything looks good on silver. Some say that on a silver car, reflectivity should be emphasized over depth. A product like Zaino, which is highly reflective, should be selected over, say, a carnuba wax, becuase silver benefits most from reflectivity.
My wife's C280 is silver, and I have been equally impressed by both approaches. It looks fantastic with Zaino. It also looks fantastic with a three-step combination of P21S GEPC, Mothers Glaze, and P21S carnuba wax. Both approaches look equally great. The Zaino is highly reflective, and the carnuba 3-step gives the paint a deep, wet look that has to be seen to be believed. My wife's car is parked outside, so I am currently using Zaino, but if it were garaged, I might well go with the P21s, because there is something about the wet look that is really compelling.
Anyway, anything you choose will look great. Experiment with the different products and see which one you like best.