Auto Stop/Start during warmup

[corgi]

Also does the stop/start work when your in eco mode?

I would hope it is more likely to work in ECO mode 

The high power consumption could be if you're draining significant current from the battery - heated rear window, headlights etc. These stop/start systems are quite careful about making sure the battery will have enough cranking power to restart the engine...

[itavaltalainen]

I would hope it is more likely to work in ECO mode 
...
These stop/start systems are quite careful about making sure the battery will have enough cranking power to restart the engine...

And yet it is utterly pointless
90% the S/S switches and restarts engine there are only seconds... and when I am actually stationary for longer it would not be difficult to stop/restart it myself...

[GolfTi]

It's maybe saved me a litre of fuel in 9k miles...

I am a little concerned about the reduced battery and starter motor life these systems must cause, are they really worth it other than to lower published mpg figures?

I agree with what others have said about warm up times - quite amazing.

[dippy_x]

I had a play about with this last week.  I have AC disabled but stop/start doesn't function for a while into the journey - according to the info unit - because of AC.  I have my temps at 23 degrees and fan on two bars.  What I have noticed is if I switch the fan off / no bars the car switches off straight away.

[GolfTi]

Didn't VW try a basic stop/start system with the standard mk2/3??

The newer version is a lot more sophisticated but really what is the point?
You save a few quid on fuel but you (or future owner) need a replacement starter/battery sooner than without the system. Is it really a carbon saver?

[Skinnee D]

SkinneeD: Although it says A/C, it'll be the auxillary heater power demand that deactivates your stop-start. Until the engine is warm enough to provide the cabin with its excess heat, the auxillary heater will be required, and by reducing the set temp from 22C to 20C, you have reduced the demand on the heater.

MH - I'd thought that too and did have a quick go at deselecting the aux heater but it didn't seem to make any difference - I'll have another look. I do find the feature very handy going to work in the mornings and if a bit of fiddling with settings would get it working earlier that could be good.
The list that rocknob posted earlier includes a <8degC criteria between interior vent and setting temperatures, which would seem to fit with what's happening.