Good points. I could probably live with gas gauge reading, but since the car is still under warranty, I'll put the onus on Mercedes to rectify. I'll certainly ask about the software updates as well.When you take it in for gas tank service complain about the transmission rough downshifts. There is a software update for that. I haven’t bothered with my gas gauge reading less than actually left in the tank. It always reads full when filled but, like yours, will indicate only minimal left when there is at least another gallon in the tank. I just consider this an additional safety margin to reduce chances of running out of gas.