My driver side heated seat has stopped working although the lights on the switch still work as normal just no heat I have the seat out but not sure what wires or plugs I should be testing so check the elements can anyone point me in the right direction? Also it seems as though the front screen is not heating on the drivers side either both seem to have failed just over the past few days, could they be connected in some way?

Have you checked/replaced the appropriate fuse(s)  ON THE WAY: BMW F21 M140i
MERCEDES GL350 - Metallic Navy Blue w/Grey interior

GOING: BMW F31 335D MSport+ xDrive Touring
GONE: Land Rover Discovery 4 HSE - Stornaway Grey w/Black Interior (wish we'd kept it )
GONE: BMW F10 520D MSport - Carbon Black
GONE:MY12 RRS SDV6 HSE Sumatra/Ivory/Grand Black Privacy glass

Yes I found the problem with the seat the element had burned out and has damaged the foam, next I need to find the problem with the windscreen