Found this... and it mentions certain climate control features that might stop it from working...I did believe you by the way, I just found it extremely odd...
Conditions for an Autostop</font>The Stop-Start System checks if each of the following conditions is fulfilled. Otherwise an Autostop will be inhibited.</font><ul style="margin: 0px 1.5em 1.5em; padding: 0px; border: 0px; outline: 0px; font-size: 11px; font-family: tahoma, verdana, arial; line-height: 16.5px; : rgb240, 240, 240;"><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The Stop-Start system is not manually activated</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The bonnet is fully closed</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The drivers door is closed or the drivers seat belt is fastened</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The battery is sufficiently charged and in good condition</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The engine is warmed up</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The engine coolant temperature is not too high</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The engine exhaust temperature is not too high, e.g. after driving with high engine load</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The ambient temperature is not too low</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The defrost selection does not inhibit an Autostop</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The Climate Control system does not inhibit an Autostop</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The brake vacuum is sufficient</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The self-cleaning function of the diesel particulate filter is not active</font><li style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; list-style: disc outside;">
The vehicle has moved since the last Autostop</font>[/list]<div style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 11px; font-family: tahoma, verdana, arial; line-height: 16.5px; : rgb240, 240, 240;">
An Autostop may become less available as the ambient temperature approaches freezing point.</font><div style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-size: 11px; font-family: tahoma, verdana, arial; line-height: 16.5px; : rgb240, 240, 240;">
</font>Certain settings of the Climate Control system may inhibit an Autostop. Please consult the Climate Control chapter in your Owners Manual for details.</font>