Mercedes will be launching a GLC F-Cell, fueled by Hydrogen with added plug-in power. It'll be launched before the end of 2017 as well, thus marketing it as a 2018.
Total range is expected to be in the ballpark of 500km (310 miles) with a full tank and a maximum charge. Electric power alone can bring you 30 miles, and the two carbon-fiber tanks can hold 4kg of hydrogen which will take approximately 3 minutes to fill.
As far as pricing goes, all they've said is it would be sold "at a price the customers will accept". Ponder on that...
How much would you think it'll be coming out at and is the interest there ?