...that nonsense feature - "start-stop". My friend has it in Polo and he switched it permanently off.
Real start-stops works perfectly well in hybrid car - engine is usually off at the intersections but you immediately start moving in Electric Drive (as in EV).
Stop start is quite nice for driving situations where you are going to be stationary at the traffic lights for 3+ minutes. It just sucks when you are at the front of the queue of a roundabout/ give way sign / stop sign with poor sight lines / small gaps where you want acceleration immediately (normally a pulse on the break gets the running), or when the car doesn't restart for some reason (happened to me twice, you just break again, and then accelerate again...). Other time it is annoying is when you are in a pulsing queue (i.e. roundabout /ramp signal), but this is more about excessive wear on the drivetrain.
I wonder how many cycles the stop-start starter motors are rated for... in city traffic you can see a lot of cycles in not many KM.
It takes a lot of fuel savings to pay for one expensive part like a $750 battery or stop-start starter motor (not sure what they are worth)...