Hello,
Sounds like the window motor to me.
My friends Matiz started to play up, then suddenly stopped working all together. I removed the door trim and gently pressed the outer casing of the motor; The window started to work again and then finally stopped. I pulled the motor apart and have discovered that the motor was worn out.
I am now trying to source the part.
How much did they charge you Harry? I am no mechanic, but it only took me a couple of hours.
Colin P
July 2008