RE: Permanently disable start & stop
I've found that there are certain points on my commute to work that I can pretty much guarantee I'm going to be stationary for at least 20 seconds or more, like the traffic lights at Apex Corner, and again when I get to top of the hill at Hendon. I've started to count the seconds now when the engine stops. As the Drive recommendations state anything 15 seconds or over is saving fuel. It's surprising how quickly 15 seconds passes.
That said... I hate it when the cars cold, I'm stopped in traffic, the engine stops then restarts itself after a few seconds - that's just pointless!