I just had to order new batts for my 13. They haven't been right since my alt burned up two years ago. Above 35 degrees they will start normal below it'll barely crank and throws all kinds of strange codes and the CEL lamp. Rock Auto had the best price even with the shipping only funny thing was both batts were shipped at the same time the same day one showed up two days early the other still on it's way... FED EX is very lacking.....
Did you have a chance to get those Mopar part numbers off your AGM batteries ?