The Mercedes S-Class Plug-in Hybrid is inching closer to production as the company has begun filing patents for the model.

The Mercedes S-Class Plug-in Hybrid is inching closer to production as the company has begun filing patents for the model.

Set to be called the S500 Hybrid Plus, the model has a familiar design but is distinguished by a revised grille, a new exhaust system and a modified rear bumper with a charging port.

Under the hood, we can expect a 3.5-liter V6 engine and a 109 HP (80 kW) electric motor that is powered by a lithium-ion battery. Nothing is official, but speculation suggests the car could have a fuel consumption rating of roughly 3 L/100km (78.4 mpg US / 94.1 mpg UK).

The Mercedes S500 Hybrid Plus is expected to be launched sometime next year and cost less than €100,000.