20" AMG oem wheel VS replica

Just bought a 2013 ML350 as a daily driver. Car came with the OEM 19" wheels which I'll use during winter. But I plan on getting a set of 5 spokes 20" AMG wheels (pic), OEM if possible or replicas if I can't find OEMs at a decent price.
Can someone confirm the width and offset on the 5 spoke 20" wheels? If I need to go with replicas, I want to make sure I get an offset and a width similar to the factory spec. I want to retain the OEM look.
I've seen 9X20 ET41 but I can't confirm if it's correct or not.
Thanks!


