I'm just over a week into ownership of my 74reg 1.5 MHEV hatchback. TO my knowledge, there's no way of knowing either if the car is in EV mode (I realise being the MHEV you can't choose to run on EV like you could on the Plug-in) or, to see how the battery is working. I had a Hyundai Tucson MHEV before and there was a little EV light that showed when the electric motor was in operation so you could ease off the accelerator at times to use more EV power and thus improve mpg. I don't think the Superb does this?

 

 

if you are displaying the rev counter (I don't) you can see the revs drop to zero when you are running on electric power only