Headlight Switch Removal

'93 500SEL, anyone know how to remove the dash rotary headlight switch? On this model, the foglamps are activated by pull the switch
out one or two clicks towards the driver. The foglamps work OK, but only when the switch is pulled out and then side to side pressure applied, seems like contacts might be fouled, thought I'd remove the switch and give it a good cleaning with some contact spray, any advice in this regard would be appreciated.
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