Listening to feedback on the article I'd like to add that MBHPP (Mercedes Benz High Performance Powertrains) currently supply their works team (Mercedes), McLaren & Force India with 2.4 Litre V8 Engines and KERS. However as Red Bull have proven this year even if you're supplied something the team can adopt a different solution. Red Bull are supplied their KERS as part of their engine package from RenaultSport but have this season also run with Supercapacitors on the floor in order to alter the way in which power is distributed and used. Mercedes (GP) could indeed re manufacturer their own components in house not utilising all the components sent to them by their sister company MBHPP giving them an advantage over McLaren & Force India. That's not to say that those two teams couldn't do the same and gain an advantage but the cost / R&D would be much larger.