I went to my archive back up drives and found some photos. Remove side trims    Remove panels surrounding gear lever - then remove the ashtray  Lever the vent and radio surround, to separate from the heater control panel -      Unplug the heater control -   To open the unit first use a T10 Torx bit to remove the screws -      There are tabs around the edge -      The heater controls dismantled.            
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