Remove the rear bumper. The sealing lips in the ventilation frame -1- must move freely and open/close automatically. Remove right luggage compartment trim. Remove the rear bumper. Press the latches from the inside one by one and remove the ventilation system -1-.
Installation in reverse order. When installing, observe the installation position. Press the plates into the mounting hole until you can clearly hear them click into place. The seal must be in full contact with the body.