POLO 2008 Electric Window Problems and CCM location?

HI all

Wife's Polo 2008 MDY TDI has been having problems with passenger electric window, used to work of from drivers side, placed passenger window but that didn't help.

Now over the last few weeks the drivers side window switch as been playing up, dodgy connection??

And now today neither electric windows work..

I've removed rubber grommet between doors and pulled all plugs and checked wires, sprayed with WD40 and put back, but this has not made any difference..

I'm now thinking it could be the CCM and water ingress corroding the wires??

What does everyone think,????

Can you let me know where this is located and will check when I have time or any other ideas that will help..

Thanks

Tony