Hi @Nods, thank you, that is very helpful. It seems your understanding is that when the battery is depleted it is still available to support the petrol engine like in your old Lexus (and like in my old DS5 hybrid) - whereas I had previously been worried that after the battery is depleted I’m left driving a petrol engine car carrying a heavy battery which is useless until I charge it up again. I think your assumption must be correct if you still get 4.7l/100 for your overall journey.That seems pretty good. For comparison my DS5 would do approx 6.3l/100 on a long motorway, (dropping to as low as 5.4l/100 when running around town).
So if this is how the DS4 hybrid system works, I will be pretty happy with that. I’m already seeing improvement in the battery range; I guess it is partly down to warmer weather, but I have only done 1,100kms, so it is hardly bedded in yet.
I have various other questions about my car, which we seem to have taken ownership of around the same time, but I’ll feed them in gently, as it looks like they would all fall in your lap!
Cheers 