Just thought I'd post up that my passenger window switch on the driver side master control stopped working the other day. The passenger window was still working when using passenger switch. I took the switch unit out and dismantled the switch itself, was clear that corrosion was the issue on the contacts,scraped off reassembled and refitted working perfectly,might be of some help to someone, saved me €50

How easy is it to get these switches out without marking them or the trim around them? Mine are working, but it's always handy to know how to pull these things apart...

Handy to know thanks

Took a bit of fiddling about with a plastic tool I used to remove a phone screen but all told 30 mins and no damage done at all.