The way I have done it is to pull the whole unit out of the dash (don't have to disconnect the cables from the heater valve, flaps in the box) by the couple of screws hold it in the dash. The knobs don't come off the levers so you have to spread the 'strips' of the over lay. They will not spread side to side but you can flex them front to back. Thus you flex the middle area back and the side forward. It helps if the knobs are not all lined up. You can then slip the overlayment over the knobs. This will make sense when you start to play with it...


Chris