As a corvette owner, i've seen this scenairo. GM came out with CF version and promptly doubled the price (other mods as well, especially engine were also included..it's the ZR-1)
Chances are, it will not be part of a standard E-Class and the pricing will make it out of reach for most owners. If not out of reach, out of consideration.
Sports cars, yes....4-door sedans, not so much.