Since the aygo haynes manual is a little shy of info & there is still a demand for this, here is the definitive list;
Here's how to reset the MMT brain
AYGO MMT RESET.pdf
Layout of the parts
AYGO MMT PART LAYOUT.pdf
System diagram
AYGO MMT GEARBOX.pdf
Construction & operation
AYGO MMT OPS.pdf
Function of main components
AYGO MMT PART FUNCTION.pdf
How the MMT ecu makes decisions (including diagnostic trouble codes DTC )
AYGO MMT SYS OPS.pdf
2019 update: Here's a link to a bunch of useful service, service bulletin and general tech info