you can't turn the heating off, just unplug the connectors... the glass sits on clips, to pull the glass, it has to go 4-5 mm vertically up to clear the plastic clips/hooks. it is easier to tilt the glass to gain more clearance for the fingers... you can have more clearance for the fingers if you pul lthe trim off - i would use three old credit cards, insert them into the gap between the bottom of the glass and the top of the external shroud, there will be a seam between the plastic parts of the shroud - squeeze the cards into that seam (the glass will be in the way, tilt it up), you are unclipping 3 wide clips... as the cards go in, you may hear the clips unclipping with a "pop", and then the shroud just falls apart, make sure you catch it...