Control knob, air vent (with chrome ring)
| Control knob, air vent (with chrome ring) | 
        
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| To remove | 
| 1. | 
        Carefully separate the plastic top (A) from the rubber knob using a knife.
         
        
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| 2. | 
        Remove the rubber knob (B) from the control knob (C).
         
        
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| To fit | 
| 1. | 
        Press the rubber knob (B) on the control knob (C).
         
        
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| 2. | 
        Press the plastic top (A) onto the rubber knob (B).
         
        
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                Warning