Julian,
There are two motors involved.
The one that Neil has pointed out is on all cars and is the one that locks the boot.
The other motor is the optional one that powers the boot lid up and down. This is for idle folk like me.
__________________
Ray at Wigan Pier
2014 A8L D4 4.0TFSI Gold (Sticker says "Beige") Can't leave you in a black smoke cloud anymore..
In progress, Nothing left to do.
Gone 2004 A8 D3 3.0 TDI. Ebony Pearl Black (with little bits of other colours and glitter)