Winter rim advice

Hi everyone,

New owner of a 2021 E450 All-Terrain here.

I’m currently running the stock tire/rim set up 245/45R19s with a rim that’s 8Jx19 ET38 and I’m looking to get a set of winter rims with separate tires. This is a square (aka non staggered) configuration.

Ideally I would like a square set up with 18 inch rims for the winter.

I’ve found some OEM Benz rims on Facebook marketplace that are 8Jx18 ET43. Seller didn’t say what model so I’m not sure what these came from but I think it’s from a C63 AMG based on the part number which is shown in the photos and is A204 401 39 02

Will these fit on my car? Any input and advice welcome.

Thanks very much, James