The backview wil not be any better if it works
Herman
I note the smiley, but actually if you have a properly working heated rear window system, they can clear the glass fine. It's just many do not have really good working H.R.W. systems. I've had my car from new and it worked and cleared the rear glass just fine. All the connections must be in good order, the voltage at the screen must be full 13 volts plus with the engine running and all the lines across must be intact, with a good earth on the left.
However, one problem with the Murena is that the airflow stays 'attached' down the rear screen (unless you have a rear spoiler) so if the outside air is really cold, this slows the heating of the glass making it take longer before it has a reasonable affect.
Roy.
The biggest problem is the water leaking from the backlights when it rains.
It soaks the carpet in the boot and because the exhaust warming it up you have lot of damp there that leads to a misty rearwindow.
Later in production they made a housing for the bachlights that made the problem better but still not realy good.
Herman
Yes and also don't ignore the holes for the number plate! Water will often leak in through those too. I have stick-on license plates so I don't drill holes in the panel. (if you use good quality double-sided adhesive tape and degrease the area properly the plate will not come off) Seal up any holes drilled previously.
Roy