what is this grey relay for?

[wacker315]

Thanks, no everything is standard since i have had the car. An update though. My electrics are now doing really weird things! i have changed the 30a fuse that the windows work from and still nothing. I cant even hear the motors trying to work. The car will now no longer lock as my key fob just suddenly stopped working, but now when i press the lock button the car locks but then opens again straight away.....