Caesar's chariot will get prettier, more powerful, and sip less fuel.
They say the eyes are the windows to the soul, which probably explains why when automakers want to give a car a facelift, the first place they start are with a car's equivalent to the eyes, the headlights. Not wanting to let its top-of-the-line Bentley-fighting convertible age the way the Continental has, Mercedes has gone under the knife for a facelift and a touch of botox, saving the headlight update for subsequent test mules. The most notable difference between the current Mercedes S-Class Convertible and the test mule we see here are the taped up tail lights.
These will complement new headlights up front despite the fact that this prototype wears the current model's lenses. In addition to the lights, bumpers featuring new designs should be present as well to ensure that the neighbors know which household they need to keep up with. Furthering the misery of previous-generation Mercedes S-Class Convertible owners is what appears to be a new interior, although we're having a hard time seeing those components as they're covered up. What we do know is that a new steering wheel will be made available along with a new instrument cluster that's full-length, much like the one that the new Mercedes S-Class sedan will get.
Aside from this, the only other part of this test mule that appears to turn heads is the fact that it's dirty, but that's likely a boon to the changes that Mercedes made under the hood. Thanks to Mercedes' recent engine roll out that included four separate engines, we can expect the S550 Convertible to get AMG's new twin-turbo 4.0-liter V8 to replace the thirstier 4.7-liter V8 in the previous car. The AMG S63 model will also ditch its larger engine, a 5.5-liter V8, in favor of a more powerful 4.0-liter twin-turbo V8 and both engines will be mated to Mercedes' new nine-speed automatic transmission to wring out just a bit more fuel economy. Expect to see an official unveiling at the upcoming Geneva Motor Show.