that so,!!!!!!well i broke mine ,! thats how i know the price,!!!!!take the two outer knobs off and there are two screws ,take them out,then pull the panel up and off,disconnecting the heater direction cable,,and the light wire,and also the power block connector,then you will see the heater switch has two push in clips to remove the servo unit,then you can push her thruogh the panel,trying to pull off the knob (ooo err) will end in a broken switch.if you want to try to remove the welded on knob-end then ,thats up to you,like i said ,mine broke.

yours must be a pre 90 car like mine then.