Removal and installation the Comfort system electrical equipment control unit
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Turn off the ignition, all electrical consumers and remove the key from the ignition switch. Remove the shock absorber panel under the instrument panel on the driver's side. Remove the driver's side footwell air vent. Remove brake light switch "1". Control unit "3" should be slightly pressed "arrow A" and pulled out "arrow B" from holder "2". After unlocking the plug connectors, disconnect them.
Installation is carried out in the reverse order of actions.