If you want to try the Zaino products go ahead .I think you will be happy with your purchase. ZAIO,CS,Z16,Z10,Z8,Z6 are my farvorites of that line and are really good products key is remember a little goes a long way.I think you will be pleased. As far as ZPC it works well but for paint correction you may want to try the
M105 since you have a Mercedes which more than likely has the ceramiclear but that depends on how bad the the in perfections are since 105 is some pretty aggressive stuff .For lighter imperfections then I would go
Menzerna SIP followed by one of their finishing polishes .This would be preceeded by a good claying.
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Ron

Makita,Metabo,Flex3403,603VV Rotary's,Flex3401,UDM,PC,PC7424XP,Aztec HotRod,Camspray 1500A PW,CamSpray Foam Cannon