Ok, kinda stumped here. Had a person ask if I can repair their Summit S-460. I looked up serial number and can find it at Weber. However I am curious on the year it was manufactured. The first two letters are AI. looking at information it says 2017 however owner swears 2016. More curious than anything. I am replacing the Burners, flavor bars and grates but the manifold is in bad shape, the control for the IR burner is not working and non of the igniters work, a couple are burned completely off. Any ideas from yall on year. Thanks.