Will this fit my Mercedes?

It uses a 5x112 bolt pattern with ET38 offset, which suits many recent Mercedes cars, but the listing notes Cabriolet fitment. Confirm your model and year with a dealer before buying.

Is this a genuine Mercedes-Benz wheel?

Yes. It carries a Mercedes part number and is sold as a new OEM AMG accessory wheel, not an aftermarket copy.

What tire size does a 20-inch wheel need?

A 20-inch rim takes a low-profile tire, typically a 245/30 or 255/30 depending on the model. Check the tire placard on your car for the approved size.

Does it come as a set of four?

No. This is a single wheel. A full set means ordering four, and tires, center caps and lug bolts are usually separate.

Is it heavier than the wheel it replaces?

At roughly 15 kg it is on the heavy side for a 20-inch alloy. That adds unsprung weight, so expect a small effect on ride and steering feel.

Can I use it for winter tires?

The gloss black finish and wide 20-inch size suit summer use better. Many owners keep a smaller wheel set for winter tires.

Where is the Wheel Alloy 21 AMG multi-spoke - Black - 10 x 21 cheapest?

At MBOnlineParts.com, for $913.50, as of our latest check.

Where can I buy the Wheel Alloy 21 AMG multi-spoke - Black - 10 x 21?

12 stores we checked sell it, including MBOnlineParts.com, Mercedes-Benz of Laredo, Mercedes Benz of Stevens Creek, Real Mercedes Parts, MercedesBenz.parts.