The 2015 Mercedes C-Class plug-in hybrid is inching closer to production as our spies have caught a prototype in a parking lot.

The 2015 Mercedes C-Class plug-in hybrid is inching closer to production as our spies have caught a prototype in a parking lot.

Looking instantly recognizable, the plug-in hybrid variant is distinguished by an active shutter grille and a revised rear bumper which has an integrated charging port that is similar to the one on the S-Class plug-in hybrid.

The interior picture doesn't reveal any significant changes but were wouldn't be surprised if the model comes with a revised COMAND system that shows hybrid-specific driving information.

While nothing is official, the model is expected to use a turbocharged 2.0-liter four-cylinder engine and a 68 PS (50 kW) electric motor. This will reportedly enable the sedan to return up to 78.4 mpg US (94.1 mpg UK or 3 L/100 km).

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