As for fuses / relays the below link may help, there may also be some info in the wiki section as well, hope this helps.

https://www.google.com/url?esrc=s&q=&a...TrstgNrhh7

There is no mention of mirror heating on the fuse diagram, are they linked with front screen? I think my screen is goosed only heats on one side and very partially on the passenger side (rhd) fbh cannot be started manually, getting a bit fed up in this damp and miserable weather.