The passenger-side electric window switch has failed on our Mercedes Vito W639 due to age and wear over time, sometimes the window will go down by itself so we're going to replace the switch to avoid this and for safety reasons too but it involves removing the door card to access it so here's a video showing the whole thing including the tools etc needed. We hope this video helps thanks!.
The switch we used is below from eBay:
www.ebay.co.uk/itm/155918992901
#mercedesvito #w639