Electric cars are cheaper to build than IC engined cars and a lot cheaper to service. The batteries are a cos that has to be bought in and sold on to the customer. No profit there for VWMercW.
Electric cars will eventually kill the car industry so don't expect too many too quickly. Cue Elon Musk and Apple.
You have read too much into my post, the government will have to recoup tax/revenue one way or another WHEN electric cars take over & that's not going to be in my life time or any time soon which is pretty obvious.