Compatible or Not?

[Edd1968]

Here's the thing,
Although my brakes are perfectly ok, they are OEM discs, pads and calipers, I feel that with newly refurbished wheels I'd like to swap my calipers for the twin pot design fitted to later models (and 500s of my car's era). My discs are 300mm and I knot that the Sport 280/350s ran bigger discs (I've seen 330mm & 345mm), do any of you gurus out there know whether the ones in the listing I've attached are a direct fit or will I need to change the hub?
I don't want to buy them, spend time having that quite frankly awful red paint job removed only to find that I need to replace hubs, discs etc.
Anyone know this?

Mercedes CLK W209 Front Brembo Twin Pot Brake Calipers Left + Right | eBay

 

[Edd1968]

Think I might just buy them and refurbish them and shove them on the shelf for now as it appears that i need to replace the dust cover behind the disc and fit the larger diameter discs. These discs aren't that old so have a fair few thousand miles in them.