An interesting Mercedes-Benz C-Class prototype was spotted by our spy photographers who notice it had the S-Class digital dashboard.

Daimler commenced production of the C-Class W205 on February 4, 2014 so it hasn't even been a full year since the compact executive sedan hit the assembly line in Bremen and already they are testing out some changes. It is way too early in the game for a facelift as a mid-cycle refresh is likely scheduled for 2017 so why did Mercedes-Benz slap the S-Class digital dashboard onto this prototype?

Our best guess is that Mercedes plans to use the digital layout on the C-Class Coupe which is due later this year in both standard and AMG specifications. Chances are only the higher-end versions will come equipped with the digital dash which could also find its way inside the top-spec C-Class Cabriolet although at the moment this is only an assumption.

As a final note, in a couple of the attached spy images you will notice a camouflaged prototype of the S-Class Pullman due later this year.

Gallery: Mysterious Mercedes-Benz C-Class prototype spied with S-Class digital dashboard

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